HIGHWOODS PROPERTIES, INC., 10-K filed on 2/9/2021
Annual Report
v3.20.4
Cover Page - USD ($)
$ in Billions
12 Months Ended
Dec. 31, 2020
Jan. 29, 2021
Jun. 30, 2020
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Document Transition Report false    
Entity Registrant Name HIGHWOODS PROPERTIES, INC.    
Entity Incorporation, State or Country Code MD    
Entity File Number 001-13100    
Entity Tax Identification Number 56-1871668    
Entity Address, Address Line One 3100 Smoketree Court    
Entity Address, Address Line Two Suite 600    
Entity Address, City or Town Raleigh    
Entity Address, State or Province NC    
Entity Address, Postal Zip Code 27604    
City Area Code 919    
Local Phone Number 872-4924    
Title of 12(b) Security Common Stock, $.01 par value, of Highwoods Properties, Inc.    
Trading Symbol HIW    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 3.8
Entity Common Stock, Shares Outstanding   103,921,110  
Entity Central Index Key 0000921082    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Amendment Flag false    
Highwoods Realty Limited Partnership [Member]      
Entity Information [Line Items]      
Entity Registrant Name HIGHWOODS REALTY LIMITED PARTNERSHIP    
Entity Incorporation, State or Country Code NC    
Entity File Number 000-21731    
Entity Tax Identification Number 56-1869557    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Entity Shell Company false    
Entity Central Index Key 0000941713    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Amendment Flag false    
v3.20.4
Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Real estate assets, at cost:    
Land $ 466,872 $ 515,095
Buildings and tenant improvements 4,981,637 5,128,150
Development in-process 259,681 172,706
Land held for development 131,474 99,163
Total real estate assets 5,839,664 5,915,114
Less-accumulated depreciation (1,418,379) (1,388,566)
Net real estate assets 4,421,285 4,526,548
Real estate and other assets, net, held for sale 11,360 20,790
Cash and cash equivalents 109,322 9,505
Restricted cash 79,922 5,237
Accounts receivable 27,488 23,370
Mortgages and notes receivable 1,341 1,501
Accrued straight-line rents receivable 259,381 234,652
Investments in and advances to unconsolidated affiliates 27,104 26,298
Deferred leasing costs, net of accumulated amortization of $151,698 and $146,125, respectively 209,329 231,347
Prepaid expenses and other assets, net of accumulated depreciation of $21,154 and $20,017, respectively 62,885 58,996
Total Assets 5,209,417 5,138,244
Liabilities, Noncontrolling Interests in the Operating Partnership and Equity/Liabilities, Redeemable Operating Partnership Units and Capital:    
Mortgages and notes payable, net 2,470,021 2,543,710
Accounts payable, accrued expenses and other liabilities 268,727 286,911
Total Liabilities 2,738,748 2,830,621
Commitments and contingencies
Noncontrolling interests in the Operating Partnership 112,499 133,216
Equity/Capital:    
Preferred Stock, $.01 par value, 50,000,000 authorized shares; 8.625% Series A Cumulative Redeemable Preferred Shares (liquidation preference $1,000 per share), 28,826 and 28,859 shares issued and outstanding, respectively 28,826 28,859
Common Stock, $.01 par value, 200,000,000 authorized shares; 103,921,546 and 103,756,046 shares issued and outstanding, respectively 1,039 1,038
Additional paid-in capital 2,993,946 2,954,779
Distributions in excess of net income available for common stockholders (686,225) (831,808)
Accumulated other comprehensive loss (1,462) (471)
Total Stockholders’ Equity 2,336,124 2,152,397
Noncontrolling interests in consolidated affiliates 22,046 22,010
Total Equity/Capital: 2,358,170 2,174,407
Total Liabilities, Noncontrolling Interests in the Operating Partnership and Equity/Total Liabilities, Redeemable Operating Partnership Units and Capital 5,209,417 5,138,244
Highwoods Realty Limited Partnership [Member]    
Real estate assets, at cost:    
Land 466,872 515,095
Buildings and tenant improvements 4,981,637 5,128,150
Development in-process 259,681 172,706
Land held for development 131,474 99,163
Total real estate assets 5,839,664 5,915,114
Less-accumulated depreciation (1,418,379) (1,388,566)
Net real estate assets 4,421,285 4,526,548
Real estate and other assets, net, held for sale 11,360 20,790
Cash and cash equivalents 109,322 9,505
Restricted cash 79,922 5,237
Accounts receivable 27,488 23,370
Mortgages and notes receivable 1,341 1,501
Accrued straight-line rents receivable 259,381 234,652
Investments in and advances to unconsolidated affiliates 27,104 26,298
Deferred leasing costs, net of accumulated amortization of $151,698 and $146,125, respectively 209,329 231,347
Prepaid expenses and other assets, net of accumulated depreciation of $21,154 and $20,017, respectively 62,885 58,996
Total Assets 5,209,417 5,138,244
Liabilities, Noncontrolling Interests in the Operating Partnership and Equity/Liabilities, Redeemable Operating Partnership Units and Capital:    
Mortgages and notes payable, net 2,470,021 2,543,710
Accounts payable, accrued expenses and other liabilities 268,727 286,911
Total Liabilities 2,738,748 2,830,621
Commitments and contingencies
Redeemable Operating Partnership Units:    
Redeemable Operating Partnership Units, Common Units, 2,838,725 and 2,723,703 outstanding, respectively 112,499 133,216
Series A Preferred Units (liquidation preference $1,000 per unit), 28,826 and 28,859 units issued and outstanding, respectively 28,826 28,859
Total Redeemable Operating Partnership Units 141,325 162,075
Equity/Capital:    
General partner Common Units, 1,063,515 and 1,060,709 outstanding, respectively 23,087 21,240
Limited partner Common Units, 102,449,222 and 102,286,528 outstanding, respectively 2,285,673 2,102,769
Accumulated other comprehensive loss (1,462) (471)
Noncontrolling interests in consolidated affiliates 22,046 22,010
Total Equity/Capital: 2,329,344 2,145,548
Total Liabilities, Noncontrolling Interests in the Operating Partnership and Equity/Total Liabilities, Redeemable Operating Partnership Units and Capital $ 5,209,417 $ 5,138,244
v3.20.4
Consolidated Balance Sheets (Parentheticals) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Assets:    
Deferred leasing costs, accumulated amortization $ 151,698 $ 146,125
Prepaid expenses and other assets, accumulated amortization $ 21,154 $ 20,017
Equity/Capital:    
Preferred Stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred Stock, authorized shares (in shares) 50,000,000 50,000,000
Preferred Stock, liquidation preference (in dollars per share) $ 1,000 $ 1,000
Preferred Stock, shares issued (in shares) 28,826 28,859
Preferred Stock, shares outstanding (in shares) 28,826 28,859
Common Stock, par value (in dollars per share) $ 0.01 $ 0.01
Common Stock, authorized shares (in shares) 200,000,000 200,000,000
Common Stock, shares issued (in shares) 103,921,546 103,756,046
Common Stock, shares outstanding (in shares) 103,921,546 103,756,046
Highwoods Realty Limited Partnership [Member]    
Assets:    
Deferred leasing costs, accumulated amortization $ 151,698 $ 146,125
Prepaid expenses and other assets, accumulated amortization $ 21,154 $ 20,017
Redeemable Operating Partnership Units:    
Redeemable Common Units, outstanding (in shares) 2,838,725 2,723,703
Preferred Units liquidation preference (in dollars per share) $ 1,000 $ 1,000
Series A Preferred Units, issued (in shares) 28,826 28,859
Series A Preferred Units, outstanding (in shares) 28,826 28,859
Common Units:    
General partners' capital account, units outstanding (in shares) 1,063,515 1,060,709
Limited partners' capital account, units outstanding (in shares) 102,449,222 102,286,528
v3.20.4
Consolidated Statements of Income - USD ($)
shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Rental and other revenues $ 736,900 $ 735,979 $ 720,035
Operating expenses:      
Rental property and other expenses 231,825 248,511 242,415
Depreciation and amortization 241,585 254,504 229,955
Impairments of real estate assets 1,778 5,849 423
General and administrative 41,031 44,067 40,006
Total operating expenses 516,219 552,931 512,799
Interest expense 80,962 81,648 71,422
Other income/(loss) (1,707) (2,510) 1,940
Gains on disposition of property 215,897 39,517 37,638
Equity in earnings of unconsolidated affiliates 4,005 3,276 2,238
Net income 357,914 141,683 177,630
Net (income) attributable to noncontrolling interests in the Operating Partnership (9,338) (3,551) (4,588)
Net (income) attributable to noncontrolling interests in consolidated affiliates (1,174) (1,214) (1,207)
Dividends on Preferred Stock (2,488) (2,488) (2,492)
Net income available for common stockholders $ 344,914 $ 134,430 $ 169,343
Earnings per Common Share - basic:      
Net income available for common stockholders (in dollars per share) $ 3.32 $ 1.30 $ 1.64
Weighted average Common Shares outstanding - basic (in shares) 103,876 103,692 103,439
Earnings per Common Share - diluted:      
Net income available for common stockholders (in dollars per share) $ 3.32 $ 1.30 $ 1.64
Weighted average Common Shares outstanding - diluted (in shares) 106,714 106,445 106,268
Highwoods Realty Limited Partnership [Member]      
Rental and other revenues $ 736,900 $ 735,979 $ 720,035
Operating expenses:      
Rental property and other expenses 231,825 248,511 242,415
Depreciation and amortization 241,585 254,504 229,955
Impairments of real estate assets 1,778 5,849 423
General and administrative 41,031 44,067 40,006
Total operating expenses 516,219 552,931 512,799
Interest expense 80,962 81,648 71,422
Other income/(loss) (1,707) (2,510) 1,940
Gains on disposition of property 215,897 39,517 37,638
Equity in earnings of unconsolidated affiliates 4,005 3,276 2,238
Net income 357,914 141,683 177,630
Net (income) attributable to noncontrolling interests in consolidated affiliates (1,174) (1,214) (1,207)
Distributions on Preferred Units (2,488) (2,488) (2,492)
Net income available for common unitholders $ 354,252 $ 137,981 $ 173,931
Earnings per Common Unit - basic:      
Net income available for common unitholders (in dollars per share) $ 3.33 $ 1.30 $ 1.64
Weighted average Common Units outstanding - basic (in shares) 106,297 106,014 105,826
Earnings per Common Unit - diluted:      
Net income available for common unitholders (in dollars per share) $ 3.33 $ 1.30 $ 1.64
Weighted average Common Units outstanding - diluted (in shares) 106,305 106,036 105,859
v3.20.4
Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Comprehensive income:      
Net income $ 357,914 $ 141,683 $ 177,630
Other comprehensive income/(loss):      
Unrealized gains/(losses) on cash flow hedges (1,238) (9,134) 4,161
Amortization of cash flow hedges 247 (1,250) (2,086)
Total other comprehensive income/(loss) (991) (10,384) 2,075
Total comprehensive income 356,923 131,299 179,705
Less-comprehensive (income) attributable to noncontrolling interests (10,512) (4,765) (5,795)
Comprehensive income attributable to common stockholders/unitholders 346,411 126,534 173,910
Highwoods Realty Limited Partnership [Member]      
Comprehensive income:      
Net income 357,914 141,683 177,630
Other comprehensive income/(loss):      
Unrealized gains/(losses) on cash flow hedges (1,238) (9,134) 4,161
Amortization of cash flow hedges 247 (1,250) (2,086)
Total other comprehensive income/(loss) (991) (10,384) 2,075
Total comprehensive income 356,923 131,299 179,705
Less-comprehensive (income) attributable to noncontrolling interests (1,174) (1,214) (1,207)
Comprehensive income attributable to common stockholders/unitholders $ 355,749 $ 130,085 $ 178,498
v3.20.4
Consolidated Statements of Equity - USD ($)
$ in Thousands
Total
Highwoods Realty Limited Partnership [Member]
Common Stock [Member]
Series A Cumulative Redeemable Preferred Shares [Member]
General Partner Common Units [Member]
Highwoods Realty Limited Partnership [Member]
Limited Partner Common Units [Member]
Highwoods Realty Limited Partnership [Member]
Additional Paid-In Capital [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Highwoods Realty Limited Partnership [Member]
Noncontrolling Interests in Consolidated Affiliates [Member]
Noncontrolling Interests in Consolidated Affiliates [Member]
Highwoods Realty Limited Partnership [Member]
Distributions in Excess of Net Income Available for Common Stockholders [Member]
Balance (in shares) at Dec. 31, 2017     103,266,875                  
Balance at Dec. 31, 2017 $ 2,237,234 $ 2,208,342 $ 1,033 $ 28,892 $ 21,830 $ 2,161,258 $ 2,929,399 $ 7,838 $ 7,838 $ 17,416 $ 17,416 $ (747,344)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Issuances of Common Units, net of issuance costs and tax withholdings   1,865     19 1,846     0   0  
Distributions on Common Units   (195,712)     (1,957) (193,755)     0   0  
Distributions on Preferred Units   (2,492)     (25) (2,467)     0   0  
Issuances of Common Stock - Shares     33,652                  
Issuances of Common Stock, net of issuance costs and tax withholdings 1,865   $ 0 0     1,865 0   0   0
Conversions of Common Units to Common Stock - Shares     90,001                  
Conversions of Common Units to Common Stock 4,043   $ 0 0     4,043 0   0   0
Dividends on Common Stock (191,302)   0 0     0 0   0   (191,302)
Dividends on Preferred Stock (2,492)   0 0     0 0   0   (2,492)
Adjustment of noncontrolling interests in the Operating Partnership to fair value 33,427   0 0     33,427 0   0   0
Distributions to noncontrolling interests in consolidated affiliates (1,047) (1,047) $ 0 0 0 0 0 0 0 (1,047) (1,047) 0
Issuances of restricted stock - Shares     172,440                  
Issuances of restricted stock 0   $ 0 0     0 0   0   0
Redemptions/repurchases of Preferred Stock (15)   $ 0 (15)     0 0   0   0
Share-based compensation expense, net of forfeitures - Shares     (5,903)                  
Share-based compensation expense, net of forfeitures 7,466 7,466 $ 3 0 75 7,391 7,463 0 0 0 0 0
Adjustment of Redeemable Common Units to fair value and contributions/distributions from/to the General Partner   37,292     372 36,920     0   0  
Net (income) attributable to noncontrolling interests in the Operating Partnership (4,588)   0 0     0 0   0   (4,588)
Net (income) attributable to noncontrolling interests in consolidated affiliates 0 0 0 0 (12) (1,195) 0 0 0 1,207 1,207 (1,207)
Comprehensive income:                        
Net income 177,630 177,630 0 0 1,776 175,854 0 0 0 0 0 177,630
Other comprehensive income/(loss) 2,075 2,075 $ 0 0 0 0 0 2,075 2,075 0 0 0
Total comprehensive income 179,705 179,705                    
Balance (in shares) at Dec. 31, 2018     103,557,065                  
Balance at Dec. 31, 2018 2,264,296 2,235,419 $ 1,036 28,877 22,078 2,185,852 2,976,197 9,913 9,913 17,576 17,576 (769,303)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Issuances of Common Units, net of issuance costs and tax withholdings   298     3 295     0   0  
Distributions on Common Units   (201,347)     (2,013) (199,334)     0   0  
Distributions on Preferred Units   (2,488)     (25) (2,463)     0   0  
Issuances of Common Stock - Shares     (143)                  
Issuances of Common Stock, net of issuance costs and tax withholdings 298   $ 0 0     298 0   0   0
Conversions of Common Units to Common Stock - Shares     15,000                  
Conversions of Common Units to Common Stock 663   $ 0 0     663 0   0   0
Dividends on Common Stock (196,935)   0 0     0 0   0   (196,935)
Dividends on Preferred Stock (2,488)   0 0     0 0   0   (2,488)
Adjustment of noncontrolling interests in the Operating Partnership to fair value (29,557)   0 0     (29,557) 0   0   0
Distributions to noncontrolling interests in consolidated affiliates (1,767) (1,767) 0 0 0 0 0 0 0 (1,767) (1,767) 0
Contributions from noncontrolling interests in consolidated affiliates 4,987 4,987 $ 0 0 0 0 0 0 0 4,987 4,987 0
Issuances of restricted stock - Shares     190,934                  
Issuances of restricted stock 0   $ 0 0     0 0   0   0
Redemptions/repurchases of Preferred Stock (18)   $ 0 (18)     0 0   0   0
Share-based compensation expense, net of forfeitures - Shares     (6,810)                  
Share-based compensation expense, net of forfeitures 7,180 7,180 $ 2 0 72 7,108 7,178 0 0 0 0 0
Adjustment of Redeemable Common Units to fair value and contributions/distributions from/to the General Partner   (28,033)     (280) (27,753)     0   0  
Net (income) attributable to noncontrolling interests in the Operating Partnership (3,551)   0 0     0 0   0   (3,551)
Net (income) attributable to noncontrolling interests in consolidated affiliates 0 0 0 0 (12) (1,202) 0 0 0 1,214 1,214 (1,214)
Comprehensive income:                        
Net income 141,683 141,683 0 0 1,417 140,266 0 0 0 0 0 141,683
Other comprehensive income/(loss) (10,384) (10,384) $ 0 0 0 0 0 (10,384) (10,384) 0 0 0
Total comprehensive income $ 131,299 131,299                    
Balance (in shares) at Dec. 31, 2019 103,756,046   103,756,046                  
Balance at Dec. 31, 2019 $ 2,174,407 2,145,548 $ 1,038 28,859 21,240 2,102,769 2,954,779 (471) (471) 22,010 22,010 (831,808)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Issuances of Common Units, net of issuance costs and tax withholdings   8,359     84 8,275     0   0  
Distributions on Common Units   (204,002)     (2,040) (201,962)     0   0  
Distributions on Preferred Units   (2,488)     (25) (2,463)     0   0  
Issuances of Common Stock - Shares     19,377                  
Issuances of Common Stock, net of issuance costs and tax withholdings 2,196   $ 0 0     2,196 0   0   0
Conversions of Common Units to Common Stock - Shares     3,570                  
Conversions of Common Units to Common Stock 145   $ 0 0     145 0   0   0
Dividends on Common Stock (199,331)   0 0     0 0   0   (199,331)
Dividends on Preferred Stock (2,488)   0 0     0 0   0   (2,488)
Adjustment of noncontrolling interests in the Operating Partnership to fair value 30,617   0 0     30,617 0   0   0
Distributions to noncontrolling interests in consolidated affiliates (1,138) (1,138) $ 0 0 0 0 0 0 0 (1,138) (1,138) 0
Issuances of restricted stock - Shares     149,304                  
Issuances of restricted stock 0   $ 0 0     0 0   0   0
Redemptions/repurchases of Preferred Stock (33)   $ 0 (33)     0 0   0   0
Share-based compensation expense, net of forfeitures - Shares     (6,751)                  
Share-based compensation expense, net of forfeitures 6,210 6,210 $ 1 0 62 6,148 6,209 0 0 0 0 0
Adjustment of Redeemable Common Units to fair value and contributions/distributions from/to the General Partner   19,932     199 19,733     0   0  
Net (income) attributable to noncontrolling interests in the Operating Partnership (9,338)   0 0     0 0   0   (9,338)
Net (income) attributable to noncontrolling interests in consolidated affiliates 0 0 0 0 (12) (1,162) 0 0 0 1,174 1,174 (1,174)
Comprehensive income:                        
Net income 357,914 357,914 0 0 3,579 354,335 0 0 0 0 0 357,914
Other comprehensive income/(loss) (991) (991) $ 0 0 0 0 0 (991) (991) 0 0 0
Total comprehensive income $ 356,923 356,923                    
Balance (in shares) at Dec. 31, 2020 103,921,546   103,921,546                  
Balance at Dec. 31, 2020 $ 2,358,170 $ 2,329,344 $ 1,039 $ 28,826 $ 23,087 $ 2,285,673 $ 2,993,946 $ (1,462) $ (1,462) $ 22,046 $ 22,046 $ (686,225)
v3.20.4
Consolidated Statements of Equity (Parentheticals) - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Series A Cumulative Redeemable Preferred Shares [Member]      
Dividends on Preferred Stock (per share)/Distributions on Preferred Units (per unit) $ 86.25 $ 86.25 $ 86.25
Highwoods Properties, Inc. [Member]      
Dividends on Common Stock (per share) 1.92 1.90 1.85
Highwoods Properties, Inc. [Member] | Series A Cumulative Redeemable Preferred Shares [Member]      
Dividends on Preferred Stock (per share)/Distributions on Preferred Units (per unit) 86.25 86.25 86.25
Highwoods Realty Limited Partnership [Member]      
Distributions on Common Units (per unit) 1.92 1.90 1.85
Highwoods Realty Limited Partnership [Member] | Series A Cumulative Redeemable Preferred Shares [Member]      
Dividends on Preferred Stock (per share)/Distributions on Preferred Units (per unit) $ 86.25 $ 86.25 $ 86.25
v3.20.4
Consolidated Statements of Cash Flows
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Operating activities:      
Net income $ 357,914 $ 141,683 $ 177,630
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 241,585 254,504 229,955
Amortization of lease incentives and acquisition-related intangible assets and liabilities (2,537) (505) (1,943)
Share-based compensation expense 6,210 7,180 7,466
Credit losses on operating lease receivables 5,458 9,861 1,212
Write-off of mortgages and notes receivable 0 4,087 0
Accrued interest on mortgages and notes receivable (118) (184) (451)
Amortization of debt issuance costs 3,092 2,970 2,857
Amortization of cash flow hedges 247 (1,250) (2,086)
Amortization of mortgages and notes payable fair value adjustments 1,681 1,619 1,449
Impairments of real estate assets 1,778 5,849 423
Losses on debt extinguishment 3,674 640 0
Net gains on disposition of property (215,897) (39,517) (37,638)
Equity in earnings of unconsolidated affiliates (4,005) (3,276) (2,238)
Distributions of earnings from unconsolidated affiliates 1,533 1,149 2,104
Settlement of cash flow hedges 0 (11,749) 7,216
Changes in operating assets and liabilities:      
Accounts receivable 437 (3,271) 1,759
Prepaid expenses and other assets (365) 1,610 1,217
Accrued straight-line rents receivable (36,576) (29,828) (23,203)
Accounts payable, accrued expenses and other liabilities (5,951) 24,225 (7,101)
Net cash provided by operating activities 358,160 365,797 358,628
Investing activities:      
Investments in acquired real estate and related intangible assets, net of cash acquired (2,363) (424,222) (50,649)
Investments in development in-process (160,612) (116,111) (150,310)
Investments in tenant improvements and deferred leasing costs (137,997) (138,754) (121,534)
Investments in building improvements (62,154) (53,826) (68,256)
Net proceeds from disposition of real estate assets 484,311 133,326 88,813
Distributions of capital from unconsolidated affiliates 72 7,833 105
Investments in mortgages and notes receivable (32) 0 0
Repayments of mortgages and notes receivable 310 295 1,312
Investments in and advances to unconsolidated affiliates 0 (9,977) 0
Changes in other investing activities (10,853) (5,971) (6,230)
Net cash provided by/(used in) investing activities 110,682 (607,407) (306,749)
Financing activities:      
Dividends on Common Stock (199,331) (196,935) (191,302)
Redemptions/repurchases of Preferred Stock (33) (18) (15)
Dividends on Preferred Stock (2,488) (2,488) (2,492)
Distributions to noncontrolling interests in the Operating Partnership (5,456) (5,189) (5,167)
Distributions to noncontrolling interests in consolidated affiliates (1,138) (1,767) (1,047)
Proceeds from the issuance of Common Stock 3,571 2,086 3,637
Costs paid for the issuance of Common Stock (215) 0 (95)
Repurchase of shares related to tax withholdings (1,160) (1,788) (1,677)
Borrowings on revolving credit facility 129,000 604,600 438,900
Repayments of revolving credit facility (350,000) (565,600) (501,900)
Borrowings on mortgages and notes payable 398,364 747,990 345,863
Repayments of mortgages and notes payable (251,952) (326,876) (211,803)
Payments of debt extinguishment costs (3,193) 0 0
Changes in debt issuance costs and other financing activities (10,309) (7,806) (2,971)
Net cash provided by/(used in) financing activities (294,340) 246,209 (130,069)
Net increase/(decrease) in cash and cash equivalents and restricted cash 174,502 4,599 (78,190)
Cash and cash equivalents and restricted cash at beginning of the period 14,742 10,143 88,333
Cash and cash equivalents and restricted cash at end of the period 189,244 14,742 10,143
Reconciliation of cash and cash equivalents and restricted cash:      
Cash and cash equivalents at end of the period 109,322 9,505 3,769
Restricted cash at end of the period 79,922 5,237 6,374
Supplemental disclosure of cash flow information:      
Cash paid for interest, net of amounts capitalized 72,350 72,014 67,235
Supplemental disclosure of non-cash investing and financing activities:      
Unrealized gains on cash flow hedges (1,238) (9,134) 4,161
Conversions of Common Units to Common Stock 145 663 4,043
Changes in accrued capital expenditures (1) (1,913) 5,625 (165)
Write-off of fully depreciated real estate assets 46,656 85,727 76,558
Write-off of fully amortized leasing costs 25,618 45,042 34,191
Write-off of fully amortized debt issuance costs 1,438 1,791 2,733
Adjustment of noncontrolling interests in the Operating Partnership to fair value (30,617) 29,557 (33,427)
Issuances of Common Units to acquire real estate assets 6,163 0 0
Contingent consideration in connection with the acquisition of land 0 1,200 0
Contributions from noncontrolling interests in consolidated affiliates 0 4,987 0
Initial recognition of lease liabilities related to right of use assets 0 35,349 0
Accrued capital expenditures included in accounts payable, accrued expenses and other liabilities 66,000 67,900 62,200
Highwoods Realty Limited Partnership [Member]      
Operating activities:      
Net income 357,914 141,683 177,630
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 241,585 254,504 229,955
Amortization of lease incentives and acquisition-related intangible assets and liabilities (2,537) (505) (1,943)
Share-based compensation expense 6,210 7,180 7,466
Credit losses on operating lease receivables 5,458 9,861 1,212
Write-off of mortgages and notes receivable 0 4,087 0
Accrued interest on mortgages and notes receivable (118) (184) (451)
Amortization of debt issuance costs 3,092 2,970 2,857
Amortization of cash flow hedges 247 (1,250) (2,086)
Amortization of mortgages and notes payable fair value adjustments 1,681 1,619 1,449
Impairments of real estate assets 1,778 5,849 423
Losses on debt extinguishment 3,674 640 0
Net gains on disposition of property (215,897) (39,517) (37,638)
Equity in earnings of unconsolidated affiliates (4,005) (3,276) (2,238)
Distributions of earnings from unconsolidated affiliates 1,533 1,149 2,104
Settlement of cash flow hedges 0 (11,749) 7,216
Changes in operating assets and liabilities:      
Accounts receivable 437 (3,271) 1,759
Prepaid expenses and other assets (365) 1,610 1,217
Accrued straight-line rents receivable (36,576) (29,828) (23,203)
Accounts payable, accrued expenses and other liabilities (5,951) 24,225 (7,101)
Net cash provided by operating activities 358,160 365,797 358,628
Investing activities:      
Investments in acquired real estate and related intangible assets, net of cash acquired (2,363) (424,222) (50,649)
Investments in development in-process (160,612) (116,111) (150,310)
Investments in tenant improvements and deferred leasing costs (137,997) (138,754) (121,534)
Investments in building improvements (62,154) (53,826) (68,256)
Net proceeds from disposition of real estate assets 484,311 133,326 88,813
Distributions of capital from unconsolidated affiliates 72 7,833 105
Investments in mortgages and notes receivable (32) 0 0
Repayments of mortgages and notes receivable 310 295 1,312
Investments in and advances to unconsolidated affiliates 0 (9,977) 0
Changes in other investing activities (10,853) (5,971) (6,230)
Net cash provided by/(used in) investing activities 110,682 (607,407) (306,749)
Financing activities:      
Distributions on Common Units (204,002) (201,347) (195,712)
Redemptions/repurchases of Preferred Units (33) (18) (15)
Distributions on Preferred Units (2,488) (2,488) (2,492)
Distributions to noncontrolling interests in consolidated affiliates (1,138) (1,767) (1,047)
Proceeds from the issuance of Common Units 3,571 2,086 3,637
Costs paid for the issuance of Common Units (215) 0 (95)
Repurchase of units related to tax withholdings (1,160) (1,788) (1,677)
Borrowings on revolving credit facility 129,000 604,600 438,900
Repayments of revolving credit facility (350,000) (565,600) (501,900)
Borrowings on mortgages and notes payable 398,364 747,990 345,863
Repayments of mortgages and notes payable (251,952) (326,876) (211,803)
Payments of debt extinguishment costs (3,193) 0 0
Changes in debt issuance costs and other financing activities (11,094) (8,583) (3,728)
Net cash provided by/(used in) financing activities (294,340) 246,209 (130,069)
Net increase/(decrease) in cash and cash equivalents and restricted cash 174,502 4,599 (78,190)
Cash and cash equivalents and restricted cash at beginning of the period 14,742 10,143 88,333
Cash and cash equivalents and restricted cash at end of the period 189,244 14,742 10,143
Reconciliation of cash and cash equivalents and restricted cash:      
Cash and cash equivalents at end of the period 109,322 9,505 3,769
Restricted cash at end of the period 79,922 5,237 6,374
Supplemental disclosure of cash flow information:      
Cash paid for interest, net of amounts capitalized 72,350 72,014 67,235
Supplemental disclosure of non-cash investing and financing activities:      
Unrealized gains on cash flow hedges (1,238) (9,134) 4,161
Changes in accrued capital expenditures (1) (1,913) 5,625 (165)
Write-off of fully depreciated real estate assets 46,656 85,727 76,558
Write-off of fully amortized leasing costs 25,618 45,042 34,191
Write-off of fully amortized debt issuance costs 1,438 1,791 2,733
Adjustment of Redeemable Common Units to fair value (26,880) 27,256 (38,049)
Issuances of Common Units to acquire real estate assets 6,163 0 0
Contingent consideration in connection with the acquisition of land 0 1,200 0
Contributions from noncontrolling interests in consolidated affiliates 0 4,987 0
Initial recognition of lease liabilities related to right of use assets 0 35,349 0
Accrued capital expenditures included in accounts payable, accrued expenses and other liabilities $ 66,000 $ 67,900 $ 62,200
v3.20.4
Description of Business and Significant Accounting Policies
12 Months Ended
Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Description of Business and Significant Accounting Policies Description of Business and Significant Accounting Policies
Description of Business

Highwoods Properties, Inc. (the “Company”) is a fully integrated real estate investment trust (“REIT”) that provides leasing, management, development, construction and other customer-related services for its properties and for third parties. The Company conducts its activities through Highwoods Realty Limited Partnership (the “Operating Partnership”). At December 31, 2020, we owned or had an interest in 27.2 million rentable square feet of in-service properties, 1.2 million rentable square feet of office properties under development and approximately 230 acres of development land.

The Company is the sole general partner of the Operating Partnership. At December 31, 2020, the Company owned all of the Preferred Units and 103.5 million, or 97.3%, of the Common Units in the Operating Partnership. Limited partners owned the remaining 2.8 million Common Units. In the event the Company issues shares of Common Stock, the net proceeds of the issuance are contributed to the Operating Partnership in exchange for additional Common Units. Generally, the Operating Partnership is obligated to redeem each Common Unit at the request of the holder thereof for cash equal to the value of one share of Common Stock based on the average of the market price for the 10 trading days immediately preceding the notice date of such redemption, provided that the Company, at its option, may elect to acquire any such Common Units presented for redemption for cash or one share of Common Stock. The Common Units owned by the Company are not redeemable. During 2020, the Company redeemed 3,570 Common Units for a like number of shares of Common Stock and the Operating Partnership issued 118,592 Common Units to acquire real estate assets.

Basis of Presentation

Our Consolidated Financial Statements are prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”).

The Company’s Consolidated Financial Statements include the Operating Partnership, wholly owned subsidiaries and those entities in which the Company has the controlling interest. The Operating Partnership’s Consolidated Financial Statements include wholly owned subsidiaries and those entities in which the Operating Partnership has the controlling interest. We consolidate joint venture investments, such as interests in partnerships and limited liability companies, when we control the major operating and financial policies of the investment through majority ownership, in our capacity as a general partner or managing member or through some other contractual right. At December 31, 2020, three properties owned through a joint venture investment were consolidated. We also consolidate those entities deemed to be variable interest entities in which we are determined to be the primary beneficiary. At December 31, 2020, we have involvement with, and are the primary beneficiary in, an entity that we concluded to be a variable interest entity (see Note 4).

In addition, during 2019, we acquired a building using a special purpose entity owned by a qualified intermediary to facilitate a potential Section 1031 reverse exchange under the Internal Revenue Code. We determined that this entity was a variable interest entity of which we were the primary beneficiary and therefore, we consolidated this entity as of December 31, 2019. During 2020, we completed the exchange by acquiring 100% of the special purpose entity.

All intercompany transactions and accounts have been eliminated.

Certain amounts within the Consolidated Statements of Income for the year ended December 31, 2018 were removed and/or combined to conform to the current year presentation.

Use of Estimates

The preparation of consolidated financial statements in accordance with GAAP requires us to make estimates and assumptions that affect the amounts reported in our Consolidated Financial Statements and accompanying notes. Actual results could differ from those estimates.
Insurance

We are primarily self-insured for health care claims for participating employees. We have stop-loss coverage to limit our exposure to significant claims on a per claim and annual aggregate basis. We determine our liabilities for claims, including incurred but not reported losses, based on all relevant information, including actuarial estimates of claim liabilities. At December 31, 2020, a reserve of $0.5 million was recorded to cover estimated reported and unreported claims.

Real Estate and Related Assets

Real estate and related assets are recorded at cost and stated at cost less accumulated depreciation. Renovations, replacements and other expenditures that improve or extend the life of assets are capitalized and depreciated over their estimated useful lives. Expenditures for ordinary maintenance and repairs are charged to expense as incurred. Depreciation is computed using the straight-line method over the estimated useful life of 40 years for buildings and depreciable land infrastructure costs, 15 years for building improvements and five to seven years for furniture, fixtures and equipment. Tenant improvements are amortized using the straight-line method over the initial fixed terms of the respective leases, which generally are from three to 10 years. Depreciation expense for real estate assets was $204.6 million, $214.7 million and $191.0 million for the years ended December 31, 2020, 2019 and 2018, respectively.

Expenditures directly related to the development and construction of real estate assets are included in net real estate assets and are stated at depreciated cost. Development expenditures include pre-construction costs essential to the development of properties, development and construction costs, interest costs on qualifying assets, real estate taxes, development personnel salaries and related costs and other costs incurred during the period of development. Interest and other carrying costs are capitalized until the building is ready for its intended use, but not later than a year from cessation of major construction activity. We consider a construction project as substantially completed and ready for its intended use upon the completion of tenant improvements. We cease capitalization on the portion that is substantially completed and occupied or held available for occupancy and capitalize only those costs associated with the portion under construction.

We record liabilities for the performance of asset retirement activities when the obligation to perform such activities is probable even when uncertainty exists about the timing and/or method of settlement.

Upon the acquisition of real estate assets accounted for as asset acquisitions, we assess the fair value of acquired tangible assets such as land, buildings and tenant improvements, intangible assets and liabilities such as above and below market leases, acquired in-place leases and other identifiable intangible assets and assumed liabilities. We allocate fair value on a relative basis based on estimated cash flow projections that utilize discount and/or capitalization rates as well as available market information. The fair value of the tangible assets of an acquired property considers the value of the property as if it were vacant.

The above and below market rate portions of leases acquired in connection with property acquisitions are recorded in deferred leasing costs and in accounts payable, accrued expenses and other liabilities, respectively, at fair value and amortized into rental revenue over the remaining term of the respective leases as described below. Fair value is calculated as the present value of the difference between (1) the contractual amounts to be paid pursuant to each in-place lease and (2) our estimate of fair market lease rates for each corresponding in-place lease, using a discount rate that reflects the risks associated with the leases acquired and measured over a period equal to the remaining initial term of the lease for above-market leases and the remaining initial term plus the term of any renewal option that the customer would be economically compelled to exercise for below-market leases.

In-place leases acquired are recorded at fair value in deferred leasing costs and amortized to depreciation and amortization expense over the remaining term of the respective lease. The value of in-place leases is based on our evaluation of the specific characteristics of each customer’s lease. Factors considered include estimates of carrying costs during hypothetical expected lease-up periods, current market conditions, the customer’s credit quality and costs to execute similar leases. In estimating carrying costs, we include real estate taxes, insurance and other operating expenses and estimates of lost rentals at market rates during the expected lease-up periods, depending on local market conditions. In estimating costs to execute similar leases, we consider tenant improvements, leasing commissions and legal and other related expenses.

Real estate and other assets are classified as long-lived assets held for use or as long-lived assets held for sale. Real estate is classified as held for sale when the sale of the asset is probable, has been duly approved by the Company, a legally enforceable contract has been executed and the buyer’s due diligence period, if any, has expired.
Impairments of Real Estate Assets and Investments in Unconsolidated Affiliates

With respect to assets classified as held for use, we perform an impairment analysis if our evaluation of events or changes in circumstances indicate that the carrying value may not be recoverable, such as a significant decline in occupancy, identification of materially adverse legal or environmental factors, change in our designation of an asset from core to non-core, which may impact the anticipated holding period, or a decline in market value to an amount less than cost. This analysis is generally performed at the property level, except when an asset is part of an interdependent group such as an office park, and consists of determining whether the asset’s carrying amount will be recovered from its undiscounted estimated future operating and residual cash flows. These cash flows are estimated based on a number of assumptions that are subject to economic and market uncertainties including, among others, demand for space, competition for customers, changes in market rental rates, costs to operate each property and expected ownership periods. For properties under development, the cash flows are based on expected service potential of the asset or asset group when development is substantially complete.

If the carrying amount of a held for use asset exceeds the sum of its undiscounted future operating and residual cash flows, an impairment loss is recorded for the difference between estimated fair value of the asset and the carrying amount. We generally estimate the fair value of assets held for use by using discounted cash flow analyses. In some instances, appraisal information may be available and is used in addition to a discounted cash flow analysis. As the factors used in generating these cash flows are difficult to predict and are subject to future events that may alter our assumptions, the discounted and/or undiscounted future operating and residual cash flows estimated by us in our impairment analyses or those established by appraisal may not be achieved and we may be required to recognize future impairment losses on properties held for use.

We record assets held for sale at the lower of the carrying amount or estimated fair value. Fair value of assets held for sale is equal to the estimated or contracted sales price with a potential buyer, less costs to sell. The impairment loss is the amount by which the carrying amount exceeds the estimated fair value.

We also analyze our investments in unconsolidated affiliates for impairment. This analysis consists of determining whether an expected loss in market value of an investment is other than temporary by evaluating the length of time and the extent to which the market value has been less than cost, the financial condition and near-term prospects of the investment, and our intent and ability to retain our investment for a period of time sufficient to allow for any anticipated recovery in market value. As the factors used in this analysis are difficult to predict and are subject to future events that may alter our assumptions, we may be required to recognize future impairment losses on our investments in unconsolidated affiliates.

Sales of Real Estate

For sales of real estate where we have collected the consideration to which we are entitled in exchange for transferring the real estate, the related assets and liabilities are removed from the balance sheet and the resultant gain or loss is recorded in the period the transaction closes. Any post-sale involvement is accounted for as separate performance obligations and when the separate performance obligations are satisfied, the sales price allocated to each is recognized.

Leases

See Note 2 for significant accounting policies and related disclosures with respect to revenue recognition for our leases, accounting for initial direct costs and lease incentive costs and credit losses on operating lease receivables as a result of the lease standard adoption effective January 1, 2019.

Discontinued Operations

Properties that are sold or classified as held for sale are classified as discontinued operations provided that the disposal represents a strategic shift that has (or will have) a major effect on our operations and financial results. Interest expense is included in discontinued operations if a related loan securing the sold property is to be paid off or assumed by the buyer in connection with the sale.

Investments in Unconsolidated Affiliates

We account for our joint venture investments using the equity method of accounting when our interests represent a general partnership interest but substantive participating rights or substantive kick out rights have been granted to the limited partners or when our interests do not represent a general partnership interest and we do not control the major operating and financial policies of the investment. These investments are initially recorded at cost as investments in unconsolidated affiliates and are
subsequently adjusted for our share of earnings and cash contributions and distributions. To the extent our cost basis at formation of the joint venture is different than the basis reflected at the joint venture level, the basis difference is amortized over the life of the related assets and included in our share of equity in earnings of unconsolidated affiliates.

Cash Equivalents

We consider highly liquid investments with an original maturity of three months or less when purchased to be cash equivalents.

Restricted Cash

Restricted cash represents cash deposits that are legally restricted or held by third parties on our behalf, such as construction-related escrows, property disposition proceeds set aside and designated or intended to fund future tax-deferred exchanges of qualifying real estate investments and escrows and reserves for debt service, real estate taxes and property insurance established pursuant to certain mortgage financing arrangements.

Redeemable Common Units and Preferred Units

Limited partners holding Common Units other than the Company (“Redeemable Common Units”) have the right to put any and all of the Common Units to the Operating Partnership and the Company has the right to put any and all of the Preferred Units to the Operating Partnership in exchange for their liquidation preference plus accrued and unpaid distributions in the event of a corresponding redemption by the Company of the underlying Preferred Stock. Consequently, these Redeemable Common Units and Preferred Units are classified outside of permanent partners’ capital in the Operating Partnership’s accompanying balance sheets. The recorded value of the Redeemable Common Units is based on fair value at the balance sheet date as measured by the closing price of Common Stock on that date multiplied by the total number of Redeemable Common Units outstanding. The recorded value of the Preferred Units is based on their redemption value.

Income Taxes

The Company has elected and expects to continue to qualify as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the “Code”). A corporate REIT is a legal entity that holds real estate assets and, through the payment of dividends to stockholders, is generally permitted to reduce or avoid the payment of federal and state income taxes at the corporate level. To maintain qualification as a REIT, the Company is required to pay dividends to its stockholders equal to at least 90.0% of its annual REIT taxable income, excluding net capital gains. The partnership agreement requires the Operating Partnership to pay economically equivalent distributions on outstanding Common Units at the same time that the Company pays dividends on its outstanding Common Stock.

Other than income taxes related to its taxable REIT subsidiary, the Operating Partnership does not reflect any federal income taxes in its financial statements, since as a partnership the taxable effects of its operations are attributed to its partners. The Operating Partnership does record state income tax for states that tax partnership income directly.

We conduct certain business activities through a taxable REIT subsidiary, as permitted under the Code. The taxable REIT subsidiary is subject to federal, state and local income taxes on its taxable income. We record provisions for income taxes based on its income recognized for financial statement purposes, including the effects of differences between such income and the amount recognized for tax purposes.

Concentration of Credit Risk

At December 31, 2020, properties that we wholly own were leased to 1,378 customers. The geographic locations that comprise greater than 10.0% of our rental and other revenues are Atlanta, Nashville, Raleigh and Tampa. Our customers engage in a wide variety of businesses. No single customer generated more than 5% of our consolidated revenues during 2020.

We maintain our cash and cash equivalents and our restricted cash at financial or other intermediary institutions. The combined account balances at each institution may exceed FDIC insurance coverage and, as a result, there is a concentration of credit risk related to amounts on deposit in excess of FDIC insurance coverage. Additionally, from time to time in connection with tax-deferred 1031 transactions, our restricted cash balances may be commingled with other funds being held by any such intermediary institution, which would subject our balance to the credit risk of the institution.
Derivative Financial Instruments

We borrow funds at a combination of fixed and variable rates. Borrowings under our revolving credit facility and bank term loans bear interest at variable rates. Our long-term debt, which consists of secured and unsecured long-term financings, typically bears interest at fixed rates. Our interest rate risk management objectives are to limit generally the impact of interest rate changes on earnings and cash flows and lower our overall borrowing costs. To achieve these objectives, from time to time, we enter into interest rate hedge contracts such as collars, swaps, caps and treasury lock agreements in order to mitigate our interest rate risk with respect to existing and prospective debt instruments. We generally do not hold or issue these derivative contracts for trading or speculative purposes. The interest rate on all of our variable rate debt is generally adjusted at one or three month intervals, subject to settlements under these interest rate hedge contracts.

Interest rate swaps involve the receipt of variable rate amounts from a counterparty in exchange for making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. Changes in the fair value of derivatives designated and that qualify as cash flow hedges are recorded in accumulated other comprehensive income/(loss) and are subsequently reclassified into interest expense as interest payments are made on our debt.

We account for terminated derivative instruments by recognizing the related accumulated other comprehensive income/(loss) balance in current earnings, unless the hedged forecasted transaction continues as originally planned, in which case we continue to amortize the accumulated other comprehensive income/(loss) into earnings over the originally designated hedge period.

Earnings Per Share and Per Unit

Basic earnings per share of the Company is computed by dividing net income available for common stockholders by the weighted Common Shares outstanding - basic. Diluted earnings per share is computed by dividing net income available for common stockholders (inclusive of noncontrolling interests in the Operating Partnership) by the weighted Common Shares outstanding - basic plus the dilutive effect of options, warrants and convertible securities outstanding, including Common Units, using the treasury stock method. Weighted Common Shares outstanding - basic includes all unvested restricted stock where dividends received on such restricted stock are non-forfeitable.

Basic earnings per unit of the Operating Partnership is computed by dividing net income available for common unitholders by the weighted Common Units outstanding - basic. Diluted earnings per unit is computed by dividing net income available for common unitholders by the weighted Common Units outstanding - basic plus the dilutive effect of options and warrants, using the treasury stock method. Weighted Common Units outstanding - basic includes all of the Company’s unvested restricted stock where distributions received on such restricted stock are non-forfeitable.

Recently Issued Accounting Standards

The Financial Accounting Standards Board (“FASB”) issued an accounting standards update (“ASU”) that changes certain disclosure requirements for fair value measurements. We adopted the ASU as of January 1, 2020 with no material effect on our Notes to Consolidated Financial Statements.

The FASB issued an ASU that provides temporary optional expedients and exceptions to the guidance on contract modifications and hedge accounting to ease the financial reporting burdens related to the expected market transition from LIBOR and other interbank offered rates to alternative reference rates, such as the Secured Overnight Financing Rate (“SOFR”). Entities can elect not to apply certain modification accounting requirements to contracts affected by reference rate reform, if certain criteria are met. An entity that makes this election would not have to remeasure the contracts at the modification date or reassess a previous accounting determination. Entities can also elect various optional expedients that would allow them to continue applying hedge accounting for hedging relationships affected by reference rate reform, if certain criteria are met. The guidance in this ASU is optional and may be elected over the period March 12, 2020 through December 31, 2022 as reference rate reform activities occur. We will continue to evaluate the impact of this ASU; however, we currently expect to avail ourselves of such optional expedients and exceptions should our modified contracts meet the required criteria.

Due to the business disruptions and challenges severely affecting the global economy caused by the COVID-19 pandemic, lessors may provide rent deferrals and other lease concessions to lessees. In April 2020, the FASB staff issued a question and answer document (the “Lease Modification Q&A”) focused on the application of lease accounting guidance to lease concessions provided as a result of the COVID-19 pandemic. Under existing lease guidance, we would have to determine, on a lease by lease basis, if a lease concession was the result of a new arrangement reached with the tenant (treated within the lease modification accounting framework) or if a lease concession was under the enforceable rights and obligations within the existing lease agreement (precluded from applying the lease modification accounting framework). The Lease Modification
Q&A allows us, if certain criteria have been met, to bypass the lease by lease analysis, and instead elect to either apply the lease modification accounting framework or not, with such election applied consistently to leases with similar characteristics and similar circumstances. We have elected the practical expedient and will not apply lease modification accounting on a lease by lease basis where applicable. As a result, $3.7 million of deferred rent is included in accounts receivable on our Consolidated Balance Sheets at December 31, 2020.
v3.20.4
Leases
12 Months Ended
Dec. 31, 2020
Leases [Abstract]  
Leases Leases
On January 1, 2019, we adopted Accounting Standards Codification Topic 842 “Leases” (“ASC 842”), which supersedes Accounting Standards Codification Topic 840 “Leases” (“ASC 840”). Information in this Note 2 with respect to our leases and lease related costs as both lessee and lessor and lease related receivables as lessor is presented under ASC 842 as of and for the years ended December 31, 2020 and 2019 and under ASC 840 for the year ended December 31, 2018.

We adopted ASC 842 using the modified retrospective approach whereby the cumulative effect of adoption was recognized on the adoption date and prior periods were not restated. There was no net cumulative effect adjustment to retained earnings as of January 1, 2019 as a result of this adoption. ASC 842 sets out the principles for the recognition, measurement, presentation and disclosure of leases for both lessees and lessors. We operate as both a lessor and a lessee. As a lessor, we are required under ASC 842 to account for leases using an approach that is substantially equivalent to ASC 840’s guidance for operating leases and other leases such as sales-type leases and direct financing leases. In addition, ASC 842 requires lessors to capitalize and amortize only incremental direct leasing costs. As a lessee, we are required under the new standard to apply a dual approach, classifying leases, such as ground leases, as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase. This classification determines whether lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. ASC 842 also requires lessees to record a right of use asset and a lease liability for all leases with a term of greater than a year regardless of their classification. We have also elected the practical expedient not to recognize right of use assets and lease liabilities for leases with a term of a year or less.

On adoption of the standard, we elected the package of practical expedients provided for in ASC 842, including:

No reassessment of whether any expired or existing contracts were or contained leases;

No reassessment of the lease classification for any expired or existing leases; and

No reassessment of initial direct costs for any existing leases.

The package of practical expedients was made as a single election and was consistently applied to all existing leases as of January 1, 2019. We also elected the practical expedient provided to lessors in a subsequent amendment to ASC 842 that removed the requirement to separate lease and nonlease components, provided certain conditions were met.

Information as Lessor Under ASC 842

We generally lease our office properties to lessees in exchange for fixed monthly payments that cover rent, property taxes, insurance and certain cost recoveries, primarily common area maintenance (“CAM”). Office properties owned by us that are under lease are primarily located in Atlanta, Charlotte, Nashville, Orlando, Pittsburgh, Raleigh, Richmond and Tampa and are leased to a wide variety of lessees across many industries. Our leases are operating leases and mostly range from three to 10 years. Payments from customers for CAM are considered nonlease components that are separated from lease components and are generally accounted for in accordance with the revenue recognition standard. However, we qualified for and elected the practical expedient related to combining the components because the lease component is classified as an operating lease and the timing and pattern of transfer of CAM income, which is not the predominant component, is the same as the lease component. As such, consideration for CAM is accounted for as part of the overall consideration in the lease. Payments from customers for property taxes and insurance are considered noncomponents of the lease and therefore no consideration is allocated to them because they do not transfer a good or service to the customer. Fixed contractual payments from our leases are recognized on a straight-line basis over the terms of the respective leases. This means that, with respect to a particular lease, actual amounts billed in accordance with the lease during any given period may be higher or lower than the amount of rental revenue recognized for the period. Straight-line rental revenue is commenced when the customer assumes control of the leased premises. Accrued straight-line rents receivable represents the amount by which straight-line rental revenue exceeds rents currently billed in accordance with lease agreements.
Some of our leases are subject to annual changes in the Consumer Price Index (“CPI”). Although increases in the CPI are not estimated as part of our measurement of straight-line rental revenue, to the extent that actual CPI is greater or less than the CPI at lease commencement, the amount of straight-line rent recognized in a given year is affected accordingly.

Some of our leases have termination options and/or extension options. Termination options allow the customer to terminate the lease prior to the end of the lease term under certain circumstances. Termination options generally become effective half way or further into the original lease term and require advance notification from the customer and payment of a termination fee that reimburses us for a portion of the remaining rent under the original lease term and the undepreciated lease inception costs such as commissions, tenant improvements and lease incentives. Termination fee income is recognized on a straight-line basis from the date of the executed termination agreement through lease expiration when the amount of the fee is determinable and collectability of the fee is reasonably assured. Our extension options generally require a re-negotiation with the customer at market rates.

Initial direct costs, primarily commissions, related to the leasing of our office properties are included in deferred leasing costs and are stated at amortized cost. Such expenditures are part of the investment necessary to execute leases and, therefore, are classified as investment activities in the statement of cash flows. All leasing commissions paid to third parties and our in-house personnel for new leases or lease renewals are capitalized. Capitalized leasing costs are amortized on a straight-line basis over the initial fixed terms of the respective leases. All other costs to negotiate or arrange a lease are expensed as incurred.

Lease incentive costs, which are payments made to or on behalf of a customer as an incentive to sign a lease, are capitalized in deferred leasing costs and amortized on a straight-line basis over the respective lease terms as a reduction of rental revenues.

Lease related receivables, which include accounts receivable and accrued straight-line rents receivable, are reduced for credit losses. Such amounts are recognized as a reduction to rental and other revenues. We regularly evaluate the collectability of our lease related receivables. Our evaluation of collectability primarily consists of reviewing the credit quality of our customer, historical trends of the customer and changes in customer payment terms. We do not maintain a general reserve to estimate amounts that may not be collectible. If our assumptions regarding the collectability of lease related receivables prove incorrect, we could experience credit losses in excess of what was recognized in rental and other revenues.

We recognized rental and other revenues related to operating lease payments of $726.0 million and $723.1 million, of which variable lease payments were $56.0 million and $65.4 million, during the years ended December 31, 2020 and 2019, respectively. The following table sets forth the undiscounted cash flows for future minimum base rents to be received from customers for leases in effect at December 31, 2020 for the properties that we wholly own:
2021$623,888 
2022619,530 
2023570,417 
2024513,483 
2025432,272 
Thereafter2,049,545 
$4,809,135 

Information as Lessor Under ASC 840

Minimum contractual rents from leases are recognized on a straight-line basis over the terms of the respective leases. This means that, with respect to a particular lease, actual amounts billed in accordance with the lease during any given period may be higher or lower than the amount of rental revenue recognized for the period. Straight-line rental revenue is commenced when the customer assumes control of the leased premises. Accrued straight-line rents receivable represents the amount by which straight-line rental revenue exceeds rents currently billed in accordance with lease agreements. Contingent rental revenue, such as percentage rent, is accrued when the contingency is removed. Termination fee income is recognized at the later of when the customer has vacated the space or the lease has expired and a fully executed lease termination agreement has been delivered, the amount of the fee is determinable and collectability of the fee is reasonably assured.

Cost recovery income is determined on a calendar year and a lease-by-lease basis. The most common types of cost recovery income in our leases are CAM and real estate taxes, for which a customer typically pays its pro-rata share of operating and administrative expenses and real estate taxes in excess of the costs incurred during a contractually specified base year. The
computation of cost recovery income is complex and involves numerous judgments, including the interpretation of lease provisions. Leases are not uniform in dealing with such cost recovery income and there are many variations in the computation. Many customers make monthly fixed payments of CAM, real estate taxes and other cost reimbursement items. We accrue income related to these payments each month. We make quarterly accrual adjustments, positive or negative, to cost recovery income to adjust the recorded amounts to our best estimate of the final annual amounts to be billed and collected. After the end of the calendar year, we compute each customer’s final cost recovery income and, after considering amounts paid by the customer during the year, issue a bill or credit for the appropriate amount to the customer. The differences between the amounts billed less previously received payments and the accrual adjustment are recorded as increases or decreases to cost recovery income when the final bills are prepared, which occurs during the first half of the subsequent year.

Accounts receivable, accrued straight-line rents receivable and mortgages and notes receivable are reduced by an allowance for amounts that may become uncollectible in the future. We regularly evaluate the adequacy of our allowance for doubtful accounts. The evaluation primarily consists of reviewing past due account balances and considering such factors as the credit quality of our customer, historical trends of the customer and changes in customer payment terms. Additionally, with respect to customers in bankruptcy, we estimate the probable recovery through bankruptcy claims and adjust the allowance for amounts deemed uncollectible. If our assumptions regarding the collectability of receivables prove incorrect, we could experience losses in excess of our allowance for doubtful accounts. The allowance and its related receivable are written-off when we have concluded there is a low probability of collection and we have discontinued collection efforts.

The following table sets forth the activity of allowance for doubtful accounts:
Balance at December 31, 2017AdditionsDeductionsBalance at December 31, 2018
Allowance for Doubtful Accounts - Straight-Line Rent$819 $599 $(777)$641 
Allowance for Doubtful Accounts - Accounts Receivable753 969 (556)1,166 
Allowance for Doubtful Accounts - Notes Receivable72 — (28)44 
Totals$1,644 $1,568 $(1,361)$1,851 

Lease incentive costs, which are payments made to or on behalf of a customer as an incentive to sign a lease, are capitalized in deferred leasing costs and amortized on a straight-line basis over the respective lease terms as a reduction of rental revenues.

Our real estate assets are leased to customers under operating leases. The minimum rental amounts under the leases are generally subject to scheduled fixed increases. Generally, the leases also provide that we receive cost recovery income from customers for increases in certain costs above the costs incurred during a contractually specified base year.  

Information as Lessee Under ASC 842

We have 20 properties subject to operating ground leases in Atlanta, Nashville, Orlando, Raleigh and Tampa with a weighted average remaining term of 51 years. Rental payments on these leases are adjusted periodically based on either the CPI or on a pre-determined schedule. The monthly payments on a pre-determined schedule are recognized on a straight-line basis over the terms of the respective leases. Changes in the CPI are not estimated as part of our measurement of straight-line rental expense. Upon initial adoption of ASC 842, we recognized a lease liability of $35.3 million (in accounts payable, accrued expenses and other liabilities) and a related right of use asset of $29.7 million (in prepaid expenses and other assets) on our Consolidated Balance Sheets equal to the present value of the minimum lease payments required under each ground lease. The difference between the recorded lease liability and right of use asset represents the accrued straight-line rent liability previously recognized under ASC 840. We used a discount rate of approximately 4.5%, which was derived from our assessment of the credit quality of the Company and adjusted to reflect secured borrowing, estimated yield curves and long-term spread adjustments over appropriate tenors. Some of our ground leases contain extension options; however, these did not impact our calculation of the right of use asset and liability as they extend beyond the useful life of the properties subject to the operating ground leases. We recognized $2.6 million and $2.5 million of ground lease expense during the years ended December 31, 2020 and 2019, respectively, and paid $2.2 million in cash during both years.
The following table sets forth the undiscounted cash flows of our scheduled obligations for future minimum payments on operating ground leases at December 31, 2020 and a reconciliation of those cash flows to the operating lease liability at December 31, 2020:

2021$2,127 
20222,169 
20232,167 
20242,123 
20252,170 
Thereafter81,527 
92,283 
Discount(57,892)
Lease liability$34,391 

Information as Lessee Under ASC 840

Certain of our properties are subject to operating ground leases. Rental payments on these leases are adjusted periodically based on either the CPI or on a pre-determined schedule. Total rental property expense recorded for operating ground leases was $2.5 million for the year ended December 31, 2018.
v3.20.4
Real Estate Assets
12 Months Ended
Dec. 31, 2020
Real Estate [Abstract]  
Real Estate Assets Real Estate Assets
Acquisitions

During 2020, we acquired two development parcels totaling less than one acre in Raleigh and Nashville for an aggregate purchase price of $8.5 million, including the issuance of 118,592 Common Units and capitalized acquisition costs.

During 2019, we acquired a building in the central business district of Charlotte, which delivered in 2019 and encompasses 841,000 rentable square feet, for a net purchase price of $399.1 million. The assets acquired and liabilities assumed were recorded at relative fair value as determined by management, with the assistance of third party specialists, based on information available at the acquisition date and on current assumptions as to future operations.

During 2019, we also acquired four development parcels totaling approximately 10 acres in Raleigh, Richmond and Pittsburgh for an aggregate purchase price, including capitalized acquisition costs, of $12.4 million.

During 2018, we acquired two development parcels totaling approximately nine acres in Nashville for an aggregate purchase price, including capitalized acquisition costs, of $50.6 million.

Dispositions

During 2020, we sold a total of 52 buildings, encompassing 4,489,000 rentable square feet, in Greensboro and Memphis and various land parcels for an aggregate sale price of $494.2 million (before closing credits to buyer of $5.7 million) and recorded aggregate gains on disposition of property of $215.5 million. During 2020, we also recognized $0.4 million of gain related to the satisfaction of a performance obligation as part of a 2016 land sale.

During 2019, we sold a total of six buildings and various land parcels for an aggregate sale price of $136.4 million and recorded aggregate gains on disposition of property of $39.5 million.

During 2018, we sold a total of three buildings and various land parcels for an aggregate sale price of $90.6 million and recorded aggregate gains on disposition of property of $37.6 million.

Impairments

During 2020, we recorded an impairment of real estate assets of $1.8 million, which resulted from a change in market-based inputs and our assumptions about the use of the assets.
During 2019, we recorded aggregate impairments of real estate assets of $5.8 million as a result of shortened hold periods from classifying all of our assets in Greensboro and Memphis as non-core and changes in market-based inputs and our assumptions about the use of the assets.

During 2018, we recorded an impairment of real estate assets of $0.4 million, which resulted from a change in market-based inputs and our assumptions about the use of the assets.
v3.20.4
Investments In and Advances To Affiliates
12 Months Ended
Dec. 31, 2020
Equity Method Investments and Joint Ventures [Abstract]  
Investments In and Advances To Affiliates Investments in and Advances to Affiliates
Unconsolidated Affiliates

We have equity interests of up to 50.0% in various joint ventures with unrelated third parties that are accounted for using the equity method of accounting because we have the ability to exercise significant influence over the operating and financial policies of the joint venture investment. The difference between the cost of these investments and the net book value of the underlying net assets was $0.6 million and $0.7 million at December 31, 2020 and 2019, respectively.

The following table sets forth our ownership in unconsolidated affiliates at December 31, 2020:
Joint VentureLocationOwnership
Interest
Plaza Colonnade, Tenant-in-CommonKansas City50.0%
Kessinger/Hunter & Company, LCKansas City26.5%
Highwoods DLF Forum, LLC (1)
Raleigh25.0%
__________
(1)We acquired our joint venture partner’s 75.0% interest in our Highwoods DLF Forum, LLC joint venture (the “Forum”) in the first quarter of 2021. See Note 19.

We receive development, management and leasing fees for services provided to certain of our joint ventures. These fees are recognized in income to the extent of our respective joint venture partner’s interest. During the years ended December 31, 2020, 2019 and 2018, we recognized $1.0 million, $0.5 million and $0.4 million, respectively, of development/construction, management and leasing fees from our unconsolidated joint ventures. At December 31, 2020 and 2019, we had receivables of $0.2 million and $0.1 million, respectively, related to these fees in accounts receivable.

Consolidated Variable Interest Entity

In 2019, we and The Bromley Companies formed a joint venture (the “Midtown One joint venture”) to construct Midtown West, a 150,000 square foot, multi-customer office building located in the mixed-use Midtown Tampa project in Tampa’s Westshore submarket. Midtown West has an anticipated total investment of $71.3 million. Construction of Midtown West began in the third quarter of 2019 with a scheduled completion date in the second quarter of 2021. At closing, we agreed to contribute cash of $20.0 million, which has been fully funded, in exchange for an 80.0% interest in the Midtown One joint venture and The Bromley Companies contributed land valued at $5.0 million in exchange for the remaining 20.0% interest. We also committed to provide a $46.3 million interest-only secured construction loan to the Midtown One joint venture that is scheduled to mature on the second anniversary of completion. The loan bears interest at LIBOR plus 250 basis points. As of December 31, 2020, $18.5 million under the loan has been funded.
We determined that we have a variable interest in the Midtown One joint venture primarily because the entity was designed to pass along interest rate risk, equity price risk and operation risk to us as both a debt and an equity holder and The Bromley Companies as an equity holder. The Midtown One joint venture was further determined to be a variable interest entity as it requires additional subordinated financial support in the form of a loan because the initial equity investment provided by us and The Bromley Companies is not sufficient to finance its planned investments and operations. We, as majority owner and managing member and through our control rights as set forth in the joint venture’s governance documents, were determined to be the primary beneficiary as we have both the power to direct the activities that most significantly affect the entity (primarily lease rates, property operations and capital expenditures) and significant economic exposure through our equity investment and loan commitment. As such, the Midtown One joint venture is consolidated and all intercompany transactions and accounts are eliminated. The following table sets forth the assets and liabilities of the Midtown One joint venture included on our Consolidated Balance Sheets:

December 31,
2020
Development in-process$46,873 
Deferred leasing costs$196 
Prepaid expenses and other assets$75 
Accounts payable, accrued expenses and other liabilities$2,693 

The assets of the Midtown One joint venture can be used only to settle obligations of the joint venture and its creditors have no recourse to our wholly owned assets.

Other Consolidated Affiliate

We have a 50.0% ownership interest in Highwoods-Markel Associates, LLC (“Markel”), a consolidated joint venture. We are the manager and leasing agent for Markel’s properties, which are located in Richmond in exchange for customary management and leasing fees. We consolidate Markel since we are the managing member and control the major operating and financial policies of the entity. As controlling member, we have an obligation to cause this property-owning entity to distribute proceeds of liquidation to the noncontrolling interest member in these partially owned properties only if the net proceeds received by the entity from the sale of any of Markel’s assets warrant a distribution as determined by the agreement governing the joint venture. We estimate the value of such noncontrolling interest distributions would have been $30.7 million had the entity been liquidated at December 31, 2020. This estimated settlement value is based on the fair value of the underlying properties which is based on a number of assumptions that are subject to economic and market uncertainties including, among others, demand for space, competition for customers, changes in market rental rates and costs to operate each property. If the entity’s underlying assets are worth less than the underlying liabilities on the date of such liquidation, we would have no obligation to remit any consideration to the noncontrolling interest holder.
v3.20.4
Intangible Assets and Below Market Leaes Liabilities
12 Months Ended
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets and Below Market Lease Liabilities Intangible Assets and Below Market Lease Liabilities
The following table sets forth total intangible assets and acquisition-related below market lease liabilities, net of accumulated amortization:
December 31,
20202019
Assets:
Deferred leasing costs (including lease incentives and above market lease and in-place lease acquisition-related intangible assets)
$361,027 $377,472 
Less accumulated amortization(151,698)(146,125)
$209,329 $231,347 
Liabilities (in accounts payable, accrued expenses and other liabilities):
Acquisition-related below market lease liabilities$63,748 $65,971 
Less accumulated amortization(37,838)(34,014)
$25,910 $31,957 
The following table sets forth amortization of intangible assets and below market lease liabilities:

Year Ended December 31,
202020192018
Amortization of deferred leasing costs and acquisition-related intangible assets (in depreciation and amortization)
$34,401 $37,386 $36,486 
Amortization of lease incentives (in rental and other revenues)$1,847 $4,281 $1,908 
Amortization of acquisition-related intangible assets (in rental and other revenues)
$1,137 $1,290 $1,677 
Amortization of acquisition-related intangible assets (in rental property and other expenses)
$510 $557 $557 
Amortization of acquisition-related below market lease liabilities (in rental and other revenues)
$(6,031)$(6,633)$(6,085)

The following table sets forth scheduled future amortization of intangible assets and below market lease liabilities:

Years Ending December 31,Amortization
of Deferred Leasing Costs and Acquisition-Related Intangible Assets (in Depreciation and Amortization)
Amortization
of Lease Incentives (in Rental and Other Revenues)
Amortization
of Acquisition-Related Intangible Assets (in Rental and Other Revenues)
Amortization
of Acquisition-Related Below Market Lease Liabilities (in Rental and Other Revenues)
2021$34,063 $1,563 $711 $(4,958)
202230,011 1,353 601 (3,977)
202326,496 1,279 447 (3,600)
202423,348 1,133 373 (2,932)
202519,224 1,064 342 (1,673)
Thereafter60,979 4,523 1,819 (8,770)
$194,121 $10,915 $4,293 $(25,910)
Weighted average remaining amortization periods as of December 31, 2020 (in years)8.39.59.78.6
v3.20.4
Mortgages and Notes Payable
12 Months Ended
Dec. 31, 2020
Debt Disclosure [Abstract]  
Mortgages and Notes Payable Mortgages and Notes Payable
Our mortgages and notes payable consisted of the following:
December 31,
20202019
Secured indebtedness:
4.00% mortgage loan due 2029 (1)
$93,350 $95,303 
93,350 95,303 
Unsecured indebtedness:
3.20% (3.363% effective rate) notes due 2021 (2)
149,901 299,369 
3.625% (3.752% effective rate) notes due 2023 (3)
249,464 249,201 
3.875% (4.038% effective rate) notes due 2027 (4)
297,534 297,134 
4.125% (4.271% effective rate) notes due 2028 (5)
347,035 346,621 
4.20% (4.234% effective rate) notes due 2029 (6)
349,189 349,091 
3.050% (3.079% effective rate) notes due 2030 (7)
399,106 399,009 
2.600% (2.645% effective rate) notes due 2031 (8)
398,423 — 
Variable rate term loan due 2022 (9)
— 100,000 
Variable rate term loan due 2022 (10)
200,000 200,000 
Revolving credit facility due 2022— 221,000 
2,390,652 2,461,425 
Less-unamortized debt issuance costs(13,981)(13,018)
Total mortgages and notes payable, net$2,470,021 $2,543,710 
__________
(1)Our secured mortgage loan was collateralized by real estate assets with an undepreciated book value of $147.9 million at December 31, 2020. We paid down $2.0 million of secured loan balances through principal amortization during 2020.
(2)Net of unamortized original issuance discount of $0.1 million and $0.6 million as of December 31, 2020 and 2019, respectively.
(3)Net of unamortized original issuance discount of $0.5 million and $0.8 million as of December 31, 2020 and 2019, respectively.
(4)Net of unamortized original issuance discount of $2.5 million and $2.9 million as of December 31, 2020 and 2019, respectively.
(5)Net of unamortized original issuance discount of $3.0 million and $3.4 million as of December 31, 2020 and 2019, respectively.
(6)Net of unamortized original issuance discount of $0.8 million and $0.9 million as of December 31, 2020 and 2019, respectively.
(7)Net of unamortized original issuance discount of $0.9 million and $1.0 million as of December 31, 2020 and 2019, respectively.
(8)Net of unamortized original issuance discount of $1.6 million as of December 31, 2020.
(9)This debt was repaid in 2020.
(10)As more fully described in Note 7, we entered into floating-to-fixed interest rate swaps that effectively fix LIBOR for $50.0 million of this loan through January 2022. Accordingly, the equivalent fixed rate of this amount is 2.79%. The interest rate on the remaining $150.0 million was 1.25% at December 31, 2020.
The following table sets forth scheduled future principal payments, including amortization, due on our mortgages and notes payable at December 31, 2020:
Years Ending December 31,Principal Amount
2021$150,504 
2022200,686 
2023251,024 
20241,124 
2025 (1)
(185)
Thereafter1,880,849 
Less-unamortized debt issuance costs(13,981)
$2,470,021 
__________
(1)Represents amortization of discounts in excess of principal payments due.

Our $600.0 million unsecured revolving credit facility is scheduled to mature in January 2022 and includes an accordion feature that allows for an additional $400.0 million of borrowing capacity subject to additional lender commitments. Assuming no defaults have occurred, we have an option to extend the maturity for two additional six-month periods. The interest rate at our current credit ratings is LIBOR plus 100 basis points and the annual facility fee is 20 basis points. There were no amounts outstanding under our revolving credit facility at both December 31, 2020 and January 29, 2021. At both December 31, 2020 and January 29, 2021, we had $0.1 million of outstanding letters of credit, which reduces the availability on our revolving credit facility. As a result, the unused capacity of our revolving credit facility at both December 31, 2020 and January 29, 2021 was $599.9 million.

During 2020, the Operating Partnership issued $400.0 million aggregate principal amount of 2.600% notes due February 2031, less original issuance discount of $1.6 million. These notes were priced to yield 2.645%. Underwriting fees and other expenses were incurred that aggregated $3.4 million; these costs were deferred and will be amortized over the term of the notes. The net proceeds from the issuance were used: (1) to finance the Operating Partnership’s cash tender offer to purchase $150.0 million principal amount of its 3.20% notes due June 15, 2021 at a purchase price of 101.908% of the face amount of the notes, plus accrued and unpaid interest; (2) to prepay without penalty our $100.0 million unsecured bank term loan that was scheduled to mature in January 2022 and which bore interest at LIBOR plus 110 basis points; and (3) for general corporate purposes. We recorded $3.7 million of aggregate losses on debt extinguishment related to the repurchase of the 3.20% notes and the term loan prepayment.

During 2019, the Operating Partnership issued $400.0 million aggregate principal amount of 3.050% notes due February 2030, less original issuance discount of $1.0 million. These notes were priced to yield 3.079%. Underwriting fees and other expenses were incurred that aggregated $3.4 million; these costs were deferred and will be amortized over the term of the notes.

During 2019, the Operating Partnership issued $350.0 million aggregate principal amount of 4.20% notes due April 2029, less original issuance discount of $1.0 million. These notes were priced to yield 4.234%. Underwriting fees and other expenses were incurred that aggregated $3.1 million; these costs were deferred and will be amortized over the term of the notes.

During 2019, we prepaid without penalty the remaining $225.0 million on our seven-year unsecured bank term loan, which was scheduled to mature in June 2020. The term loan bore interest at LIBOR plus 110 basis points. We recorded $0.4 million of loss on debt extinguishment related to this prepayment.

During 2019, we prepaid without penalty $100.0 million on our $200.0 million unsecured bank term loan and recorded $0.3 million of loss on debt extinguishment related to this prepayment. During 2020, we prepaid without penalty the remaining $100.0 million upon issuance of the $400.0 million aggregate principal amount of 2.600% notes due February 2031. The term loan was scheduled to mature in January 2022 and bore interest at LIBOR plus 110 basis points.

During 2018, we paid off at maturity $200.0 million principal amount of 7.5% unsecured notes.
During 2018, the Operating Partnership issued $350.0 million aggregate principal amount of 4.125% notes due March 2028, less original issuance discount of $4.1 million. These notes were priced to yield 4.271%. Underwriting fees and other expenses were incurred that aggregated $2.9 million; these costs were deferred and will be amortized over the term of the notes.

Our revolving credit facility and bank term loans require us to comply with customary operating covenants and various financial requirements. Upon an event of default on the revolving credit facility, the lenders having at least 51.0% of the total commitments under the revolving credit facility can accelerate all borrowings then outstanding, and we could be prohibited from borrowing any further amounts under our revolving credit facility, which would adversely affect our ability to fund our operations. In addition, certain of our unsecured debt agreements contain cross-default provisions giving the unsecured lenders the right to declare a default if we are in default under more than $30.0 million with respect to other loans in some circumstances.

We are currently in compliance with financial covenants with respect to our consolidated debt.

The Operating Partnership has $149.9 million carrying amount of 2021 notes outstanding, $249.5 million carrying amount of 2023 notes outstanding, $297.5 million carrying amount of 2027 notes outstanding, $347.0 million carrying amount of 2028 notes outstanding, $349.2 million carrying amount of 2029 notes outstanding, $399.1 million carrying amount of 2030 notes outstanding and $398.4 million carrying amount of 2031 notes outstanding. The indenture that governs these outstanding notes requires us to comply with customary operating covenants and various financial ratios. The trustee or the holders of at least 25.0% in principal amount of any series of notes can accelerate the principal amount of such series upon written notice of a default that remains uncured after 60 days.

We have considered our short-term liquidity needs within one year from February 9, 2021 (the date of issuance of the annual financial statements) and the adequacy of our estimated cash flows from operating activities and other available financing sources to meet these needs. In particular, we have considered our scheduled debt maturities during such one-year period, including the remaining $150.0 million principal amount of unsecured notes that are scheduled to mature on June 15, 2021. We intend to exercise our right to redeem the remaining 3.20% notes at par on April 15, 2021. We have concluded it is probable we will meet these short-term liquidity requirements through a combination of the following:

available cash and cash equivalents;

cash flows from operating activities;

issuance of debt securities by the Operating Partnership;

issuance of secured debt;

bank term loans;

borrowings under our revolving credit facility;

issuance of equity securities by the Company or the Operating Partnership; and

the disposition of non-core assets.

Capitalized Interest

Total interest capitalized to development and significant building and tenant improvement projects was $8.3 million, $5.6 million and $6.7 million for the years ended December 31, 2020, 2019 and 2018, respectively.
v3.20.4
Derivative Financial Instruments
12 Months Ended
Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivative Financial Instruments Derivative Financial InstrumentsDuring 2019, we entered into $150.0 million notional amount of forward-starting swaps that effectively locked the underlying 10-year treasury rate at 1.87% with respect to a planned issuance of debt securities by the Operating Partnership. Upon the subsequent issuance of the $400.0 million aggregate principal amount of 3.050% notes due February 2030 during 2019, we terminated the forward-starting swaps and paid cash upon settlement. The unrealized loss of $6.6 million in accumulated other comprehensive income/(loss) will be reclassified to interest expense as interest payments are made on the debt.
During 2018, we entered into an aggregate of $225.0 million notional amount of forward-starting swaps that effectively locked the underlying 10-year treasury rate at a weighted average of 2.86% with respect to a planned issuance of debt securities by the Operating Partnership. Upon issuance of the $350.0 million aggregate principal amount of 4.20% notes due April 2029 during 2019, we terminated the forward-starting swaps and paid cash upon settlement. The unrealized loss of $5.1 million in accumulated other comprehensive income/(loss) will be reclassified to interest expense as interest payments are made on the debt.

We previously entered into $150.0 million notional amount of forward-starting swaps that effectively locked the underlying 10-year treasury rate at 2.44% with respect to a planned issuance of debt securities by the Operating Partnership. Upon issuance of the $350.0 million aggregate principal amount of 4.125% notes due March 2028 during 2018, we terminated the forward-starting swaps and received cash upon settlement. The unrealized gain of $7.0 million in accumulated other comprehensive income/(loss) will be reclassified to interest expense as interest payments are made on the debt and a gain of $0.2 million of hedge ineffectiveness was recognized in interest expense.

We previously entered into floating-to-fixed interest rate swaps through January 2022 with respect to an aggregate of $50.0 million LIBOR-based borrowings. These swaps effectively fix the underlying one-month LIBOR rate at a weighted average rate of 1.693%.

We also had floating-to-fixed interest rate swaps with respect to an aggregate of $225.0 million LIBOR-based borrowings. These swaps effectively fixed the underlying one-month LIBOR rate at a weighted average rate of 1.678%. During 2019, these interest rate swaps expired.

The counterparties under our swaps are major financial institutions. The swap agreements contain a provision whereby if we default on certain of our indebtedness and which default results in repayment of such indebtedness being, or becoming capable of being, accelerated by the lender, then we could also be declared in default on our swaps.

Our interest rate swaps have been designated as and are being accounted for as cash flow hedges with changes in fair value recorded in other comprehensive income/(loss) each reporting period. We have no collateral requirements related to our interest rate swaps.

Amounts reported in accumulated other comprehensive income/(loss) related to derivatives will be reclassified to interest expense as interest payments are made on our debt. During 2021, we estimate that $0.5 million will be reclassified as a net increase to interest expense.

The following table sets forth the fair value of our derivatives:
December 31,
20202019
Derivatives:
Derivatives designated as cash flow hedges in accounts payable, accrued expenses and other liabilities:
Interest rate swaps$846 $154 

The following table sets forth the effect of our cash flow hedges on accumulated other comprehensive income/(loss) and interest expense:
Year Ended December 31,
202020192018
Derivatives Designated as Cash Flow Hedges:
Amount of unrealized gains/(losses) recognized in accumulated other comprehensive income/(loss) on derivatives:
Interest rate swaps$(1,238)$(9,134)$4,161 
Amount of (gains)/losses reclassified out of accumulated other comprehensive income/(loss) into interest expense:
Interest rate swaps$247 $(1,250)$(2,086)
v3.20.4
Commitments and Contingencies
12 Months Ended
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies Commitments and Contingencies
Lease and Contractual Commitments

We have $212.9 million of lease and contractual commitments at December 31, 2020. Lease and contractual commitments represent commitments under signed leases and contracts for operating properties (excluding tenant-funded tenant improvements) and contracts for development/redevelopment projects, of which $58.0 million was recorded on our Consolidated Balance Sheets at December 31, 2020.

Contingent Consideration

We had $0.8 million and $5.3 million of contingent consideration related to certain parcels of acquired development land at December 31, 2020 and 2019, respectively. The contingent consideration for each is payable in cash to a third party if and to the extent future development milestones as outlined in the purchase agreements are met.

Environmental Matters

Substantially all of our in-service and development properties have been subjected to Phase I environmental assessments and, in certain instances, Phase II environmental assessments. Such assessments and/or updates have not revealed, nor are we aware of, any environmental liability that we believe would have a material adverse effect on our Consolidated Financial Statements.

Litigation, Claims and Assessments

We are from time to time a party to a variety of legal proceedings, claims and assessments arising in the ordinary course of our business. We regularly assess the liabilities and contingencies in connection with these matters based on the latest information available. For those matters where it is probable that we have incurred or will incur a loss and the loss or range of loss can be reasonably estimated, the estimated loss is accrued and charged to income in our Consolidated Financial Statements. In other instances, because of the uncertainties related to both the probable outcome and amount or range of loss, a reasonable estimate of liability, if any, cannot be made. Based on the current expected outcome of such matters, none of these proceedings, claims or assessments is expected to have a material effect on our business, financial condition, results of operations or cash flows.

COVID-19

Since early March 2020, efforts to slow the spread of the COVID-19 virus have had a significant impact on the U.S. economy. We continue to follow the policies described in Notes 1 and 2, including those related to impairments of real estate assets and investments in unconsolidated affiliates, leases and estimates of credit losses on operating lease receivables. While the results of our current analyses did not result in any material adjustments to amounts as of and for the year ended December 31, 2020, circumstances related to the COVID-19 pandemic may result in recording impairments, lease modifications and credit losses in future periods.
v3.20.4
Noncontrolling Interests
12 Months Ended
Dec. 31, 2020
Noncontrolling Interest [Abstract]  
Noncontrolling Interests Noncontrolling Interests
Noncontrolling Interests in Consolidated Affiliates

At December 31, 2020, our noncontrolling interests in consolidated affiliates relate to our joint venture partners’ 50.0% interest in office properties in Richmond and 20.0% interest in an office development property in Tampa. Our joint venture partners are unrelated third parties.

Noncontrolling Interests in the Operating Partnership

Noncontrolling interests in the Operating Partnership relate to the ownership of Redeemable Common Units. Net income attributable to noncontrolling interests in the Operating Partnership is computed by applying the weighted average percentage of Redeemable Common Units during the period, as a percent of the total number of outstanding Common Units, to the Operating Partnership’s net income for the period after deducting distributions on Preferred Units. When a noncontrolling unitholder redeems a Common Unit for a share of Common Stock or cash, the noncontrolling interests in the Operating Partnership are reduced and the Company’s share in the Operating Partnership is increased by the fair value of each security at the time of redemption.

The following table sets forth the Company’s noncontrolling interests in the Operating Partnership:

Year Ended December 31,
20202019
Beginning noncontrolling interests in the Operating Partnership$133,216 $105,960 
Adjustment of noncontrolling interests in the Operating Partnership to fair value(30,617)29,557 
Issuances of Common Units6,163 — 
Conversions of Common Units to Common Stock(145)(663)
Net income attributable to noncontrolling interests in the Operating Partnership9,338 3,551 
Distributions to noncontrolling interests in the Operating Partnership(5,456)(5,189)
Total noncontrolling interests in the Operating Partnership$112,499 $133,216 

The following table sets forth net income available for common stockholders and transfers from the Company’s noncontrolling interests in the Operating Partnership:
Year Ended December 31,
202020192018
Net income available for common stockholders$344,914 $134,430 $169,343 
Increase in additional paid in capital from conversions of Common Units to Common Stock
145 663 4,043 
Issuances of Common Units
(6,163)— — 
Change from net income available for common stockholders and transfers from noncontrolling interests$338,896 $135,093 $173,386 
v3.20.4
Disclosure About Fair Value of Financial Instruments
12 Months Ended
Dec. 31, 2020
Fair Value Disclosures [Abstract]  
Disclosure About Fair Value of Financial Instruments Disclosure About Fair Value of Financial Instruments
The following summarizes the levels of inputs that we use to measure fair value.

Level 1. Quoted prices in active markets for identical assets or liabilities.

Our Level 1 asset is our investment in marketable securities that we use to pay benefits under our non-qualified deferred compensation plan. Our Level 1 liability is our non-qualified deferred compensation obligation. The Company’s Level 1 noncontrolling interests in the Operating Partnership relate to the ownership of Common Units by various individuals and entities other than the Company.

Level 2. Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the related assets or liabilities.

Our Level 2 assets include the fair value of our mortgages and notes receivable. Our Level 2 liabilities include the fair value of our mortgages and notes payable and interest rate swaps.

The fair value of mortgages and notes receivable and mortgages and notes payable is estimated by the income approach utilizing contractual cash flows and market-based interest rates to approximate the price that would be paid in an orderly transaction between market participants. The fair value of interest rate swaps is determined using the market standard methodology of netting the discounted future fixed cash receipts and the discounted expected variable cash payments. The variable cash payments of interest rate swaps are based on the expectation of future interest rates (forward curves) derived from observed market interest rate curves. In addition, credit valuation adjustments are considered in the fair values to account for potential nonperformance risk, but were concluded to not be significant inputs to the calculation for the periods presented.

Level 3. Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Our Level 3 assets include any real estate assets recorded at fair value on a non-recurring basis as a result of our quarterly impairment analysis, which are valued using unobservable local and national industry market data such as comparable sales, appraisals, brokers’ opinions of value and/or the terms of definitive sales contracts. Significant increases or decreases in any valuation inputs in isolation would result in a significantly lower or higher fair value measurement.
The following table sets forth our assets and liabilities and the Company’s noncontrolling interests in the Operating Partnership that are measured or disclosed at fair value within the fair value hierarchy:

Level 1Level 2
TotalQuoted Prices
in Active
Markets for Identical Assets or Liabilities
Significant Observable Inputs
Fair Value at December 31, 2020:
Assets:
Mortgages and notes receivable, at fair value (1)
$1,341 $— $1,341 
Marketable securities of non-qualified deferred compensation plan (in prepaid expenses and other assets)
2,573 2,573 — 
Total Assets$3,914 $2,573 $1,341 
Noncontrolling Interests in the Operating Partnership$112,499 $112,499 $— 
Liabilities:
Mortgages and notes payable, net, at fair value (1)
$2,639,163 $— $2,639,163 
Interest rate swaps (in accounts payable, accrued expenses and other liabilities)
846 — 846 
Non-qualified deferred compensation obligation (in accounts payable, accrued expenses and other liabilities)
2,573 2,573 — 
Total Liabilities$2,642,582 $2,573 $2,640,009 
Fair Value at December 31, 2019:
Assets:
Mortgages and notes receivable, at fair value (1)
$1,501 $— $1,501 
Marketable securities of non-qualified deferred compensation plan (in prepaid expenses and other assets)
2,345 2,345 — 
Total Assets$3,846 $2,345 $1,501 
Noncontrolling Interests in the Operating Partnership$133,216 $133,216 $— 
Liabilities:
Mortgages and notes payable, net, at fair value (1)
$2,615,776 $— $2,615,776 
Interest rate swaps (in accounts payable, accrued expenses and other liabilities)
154 — 154 
Non-qualified deferred compensation obligation (in accounts payable, accrued expenses and other liabilities)
2,345 2,345 — 
Total Liabilities$2,618,275 $2,345 $2,615,930 
__________
(1)    Amounts are not recorded at fair value on our Consolidated Balance Sheets at December 31, 2020 and 2019.

The Level 3 impaired real estate assets measured at a fair value of $2.1 million in the second quarter of 2020 included a non-core office building. The impairment resulted from a change in our assumptions about the use of the assets and was calculated using brokers’ opinions of value, letters of intent and comparable sales as observable inputs were not available.

The Level 3 impaired real estate assets measured at a fair value of $7.6 million in the third quarter of 2019 included an office building and land held for development. The aggregate impairments resulted from a change in our assumptions about the use of the assets and were calculated using brokers’ opinions of value and comparable sales as observable inputs were not available.

The Level 3 impaired real estate assets measured at a fair value of $0.7 million in the second quarter of 2019 included land held for development. The impairment resulted from a change in our assumptions about the use of the assets and was calculated using the terms of definitive sales contracts as observable inputs were not available.
v3.20.4
Equity
12 Months Ended
Dec. 31, 2020
Equity [Abstract]  
Equity Equity
Common Stock Issuances

At December 31, 2020, the Company had 96.1 million remaining shares of Common Stock authorized to be issued under its charter.

Common Stock Dividends

Dividends of the Company declared per share of Common Stock aggregated $1.92, $1.90 and $1.85 for the years ended December 31, 2020, 2019 and 2018, respectively.

The following table sets forth the Company’s estimated taxability to the common stockholders of dividends per share for federal income tax purposes:

Year Ended December 31,
202020192018
Ordinary dividend$1.65 $1.64 $1.48 
Capital gains0.25 0.13 0.31 
Return of capital0.02 0.13 0.06 
Total$1.92 $1.90 $1.85 

The Company’s tax returns have not been examined by the Internal Revenue Service (“IRS”) and, therefore, the taxability of dividends is subject to change.

Preferred Stock

The following table sets forth the Company’s Preferred Stock:

Issue DateNumber of Shares OutstandingCarrying ValueLiquidation Preference Per ShareOptional Redemption DateAnnual Dividends Payable Per Share
(in thousands)
December 31, 2020
8.625% Series A Cumulative Redeemable2/12/199729 $28,826 $1,000 2/12/2027$86.25 
December 31, 2019
8.625% Series A Cumulative Redeemable2/12/199729 $28,859 $1,000 2/12/2027$86.25 

The following table sets forth the Company’s estimated taxability to the preferred stockholders of dividends per share for federal income tax purposes:

Year Ended December 31,
202020192018
8.625% Series A Cumulative Redeemable:
Ordinary dividend$74.96 $79.90 $71.22 
Capital gains11.29 6.35 15.03 
Total$86.25 $86.25 $86.25 

The Company’s tax returns have not been examined by the IRS and, therefore, the taxability of dividends is subject to change.
Warrants

At both December 31, 2020 and 2019, we had 15,000 warrants outstanding with an exercise price of $32.50 per share. Upon exercise of a warrant, the Company will contribute the exercise price to the Operating Partnership in exchange for Common Units. Therefore, the Operating Partnership accounts for such warrants as if issued by the Operating Partnership. These warrants have no expiration date.

Common Unit Distributions

Distributions of the Operating Partnership declared per Common Unit aggregated $1.92, $1.90 and $1.85 for the years ended December 31, 2020, 2019 and 2018, respectively.

Redeemable Common Units

Generally, the Operating Partnership is obligated to redeem each Redeemable Common Unit at the request of the holder thereof for cash equal to the value of one share of Common Stock based on the average of the market price for the 10 trading days immediately preceding the notice date of such redemption, provided that the Company, at its option, may elect to acquire any such Redeemable Common Unit presented for redemption for cash or one share of Common Stock. When a holder redeems a Redeemable Common Unit for a share of Common Stock or cash, the Company’s share in the Operating Partnership will be increased. The Common Units owned by the Company are not redeemable.

Preferred Units

The following table sets forth the Operating Partnership’s Preferred Units:
Issue DateNumber of
Units
Outstanding
Carrying
Value
Liquidation Preference
Per Unit
Optional Redemption
Date
Annual
Distributions
Payable
Per Unit
(in thousands)
December 31, 2020
8.625% Series A Cumulative Redeemable2/12/199729 $28,826 $1,000 2/12/2027$86.25 
December 31, 2019
8.625% Series A Cumulative Redeemable2/12/199729 $28,859 $1,000 2/12/2027$86.25 
v3.20.4
Employee Benefit Plans
12 Months Ended
Dec. 31, 2020
Share-based Payment Arrangement [Abstract]  
Employee Benefit Plans Employee Benefit Plans
Officer, Management and Director Compensation Programs

Officers of the Company participate in an annual non-equity incentive program pursuant to which they are eligible to earn cash payments based on a percentage of their annual base salary in effect for December of the applicable year. Under this component of our executive compensation program, officers are eligible to earn additional cash compensation to the extent specific performance-based metrics are achieved during the most recently completed year. The position held by each officer has a target annual incentive percentage that ranges from 35% to 130% of base salary. The more senior the position, the greater the portion of compensation that varies with performance.

The percentage amount an officer may earn under the annual non-equity incentive plan is the product of the target annual incentive percentage times an “actual performance factor,” which can range from zero to 200%. The actual performance factor depends upon the relationship between actual performance in specific areas at each of our divisions and predetermined goals. For corporate officers, the actual performance factor is based on the goals and criteria applied to the Company’s performance as a whole. For officers who oversee our divisions, the actual performance factor is based on the goals and criteria applied partly to that division’s performance and partly to the Company’s performance overall. Amounts under our annual non-equity incentive plan are accrued and expensed in the year earned, but are typically paid early in the following year.

Certain other employees participate in a similar annual non-equity incentive program. Incentive eligibility ranges from 10% to 30% of annual base salary. The actual incentive payment is determined by a mix of the Company’s overall performance, the performance of any applicable division and the individual’s performance during each year. These amounts are also accrued and expensed in the year earned, but are typically paid early in the following year.

The Company’s officers are eligible to receive a mix of long-term equity incentive awards on or about March 1 of each year. Prior to 2018, the mix generally consisted of stock options, time-based restricted stock and total return-based restricted stock. Since 2018, the mix has consisted of time-based restricted stock and total return-based restricted stock. Time-based restricted stock grants are also made annually to directors and certain other employees. Dividends received on restricted stock are non-forfeitable and are paid at the same rate and on the same date as on shares of Common Stock, except that, with respect to shares of total return-based restricted stock issued to the Company’s chief executive officer, dividends accumulate and are payable only if and to the extent the shares vest. Dividends paid on subsequently forfeited shares are expensed. Additional shares of total return-based restricted stock may be issued at the end of the applicable measurement periods if and to the extent actual performance exceeds certain levels of performance. Such additional shares, if any, would be fully vested when issued. No expense is recorded for additional shares of total return-based restricted stock that may be issued at the end of the applicable measurement period since that possibility is reflected in the grant date fair value. The following table sets forth the number of shares of Common Stock reserved for future issuance under the Company’s long-term equity incentive plans:
December 31,
20202019
Outstanding stock options and warrants552,373 599,902 
Possible future issuance under equity incentive plans1,926,324 2,016,659 
2,478,697 2,616,561 

Of the possible future issuance under the Company’s long-term equity incentive plans at December 31, 2020, no more than an additional 0.3 million shares can be in the form of restricted stock.

During the years ended December 31, 2020, 2019 and 2018, we recognized $6.2 million, $7.2 million and $7.5 million, respectively, of share-based compensation expense. Because REITs generally do not pay income taxes, we do not realize tax benefits on share-based payments. At December 31, 2020, there was $5.2 million of total unrecognized share-based compensation costs, which will be recognized over a weighted average remaining contractual term of 1.9 years.
- Stock Options

Stock options issued from 2014 through 2017 vest ratably on an annual basis over four years and expire after 10 years. All stock options have an exercise price equal to the last reported stock price of our Common Stock on the New York Stock Exchange (“NYSE”) on the last trading day prior to grant. The value of all options as of the date of grant is calculated using the Black-Scholes option-pricing model and is amortized over the respective vesting period or the service period, if shorter, for employees who are or will become eligible under the Company’s retirement plan.

The following table sets forth stock option activity:
Options Outstanding
Number of OptionsWeighted Average Exercise Price
Stock options outstanding at December 31, 2017640,822 $45.29 
Exercised(44,304)40.15 
Stock options outstanding at December 31, 2018596,518 45.67 
Exercised(9,026)39.53 
Forfeited(2,590)48.79 
Stock options outstanding at December 31, 2019584,902 45.75 
Exercised(42,163)41.10 
Forfeited(5,366)50.82 
Stock options outstanding at December 31, 2020 (1) (2)
537,373 $46.07 
__________
(1)The outstanding options at December 31, 2020 had a weighted average remaining life of 5.0 years.
(2)The Company had 496,656 options exercisable at December 31, 2020 with a weighted average exercise price of $45.54, weighted average remaining life of 4.9 years and intrinsic value of $0.1 million. Of these exercisable options, 436,880 had exercise prices higher than the market price of our Common Stock at December 31, 2020.

Cash received or receivable from options exercised was $1.9 million, $0.4 million and $1.9 million for the years ended December 31, 2020, 2019 and 2018, respectively. The total intrinsic value of options exercised during the years ended December 31, 2020, 2019 and 2018 was $0.4 million, $0.1 million and $0.4 million, respectively. The total intrinsic value of options outstanding at December 31, 2020, 2019 and 2018 was $0.1 million, $2.4 million and $0.1 million, respectively. The Company generally does not permit the net cash settlement of exercised stock options, but does permit net share settlement so long as the shares received are held for at least a year. The Company has a practice of issuing new shares to satisfy stock option exercises.

- Time-Based Restricted Stock

Shares of time-based restricted stock vest ratably on an annual basis generally over four years. Beginning in 2019, shares of time-based restricted stock granted to non-employee directors vest on the first anniversary of the grant date. The value of grants of time-based restricted stock is based on the market value of Common Stock as of the date of grant and is amortized to expense over the respective vesting period or the service period, if shorter, for employees who are or will become eligible under the Company’s retirement plan.
The following table sets forth time-based restricted stock activity:
Number of SharesWeighted Average Grant Date Fair Value
Restricted shares outstanding at December 31, 2017172,246 $46.46 
Awarded and issued (1)
94,984 43.01 
Vested (2)
(73,307)44.19 
Forfeited(2,684)45.89 
Restricted shares outstanding at December 31, 2018191,239 45.62 
Awarded and issued (1)
103,590 45.98 
Vested (2)
(73,036)45.79 
Forfeited(3,642)46.07 
Restricted shares outstanding at December 31, 2019218,151 45.73 
Awarded and issued (1)
83,116 44.88 
Vested (2)
(88,326)45.86 
Forfeited(3,751)45.78 
Restricted shares outstanding at December 31, 2020209,190 $45.34 
__________
(1)The weighted average fair value at grant date of time-based restricted stock issued during the years ended December 31, 2020, 2019 and 2018 was $3.7 million, $4.8 million and $4.1 million, respectively.
(2)The vesting date fair value of time-based restricted stock that vested during the years ended December 31, 2020, 2019 and 2018 was $3.9 million, $3.3 million and $3.2 million, respectively. Vested shares include those shares surrendered by employees to satisfy tax withholding obligations in connection with such vesting.

- Total Return-Based Restricted Stock

Shares of total return-based restricted stock vest to the extent the Company’s absolute total returns for certain pre-determined three-year periods exceed predetermined goals. The amount subject to vesting ranges from zero to 150%. For total return-based restricted stock issued prior to 2020, notwithstanding the Company’s absolute total return, if the Company’s total return exceeds 100% of the average peer group total return index, at least 75% of total return-based restricted stock issued will vest at the end of the applicable period. This amount was increased from 75% to 100% for total return-based restricted stock issued in 2020. The weighted average grant date fair value of such shares of total return-based restricted stock issued in 2020, 2019 and 2018 was determined to be $38.31, $39.42 and $40.81, respectively, and is amortized over the respective three-year period or the service period, if shorter, for employees who are or will become eligible under the Company’s retirement plan. The fair values of the total return-based restricted stock granted were determined at the grant dates using a Monte Carlo simulation model and the following assumptions:
202020192018
Risk free interest rate (1) 
0.9 %2.4 %2.3 %
Common stock dividend yield (2) 
3.9 %4.4 %3.9 %
Expected volatility (3) 
20.4 %27.3 %41.1 %
__________
(1)Represents the interest rate as of the grant date on US treasury bonds having the same life as the estimated life of the total return-based restricted stock grants.
(2)The dividend yield is calculated utilizing the then current regular dividend rate for a one-year period and the average per share price of Common Stock during the three-month period preceding the date of grant.
(3)Based on the historical volatility of Common Stock over a period relevant to the related total return-based restricted stock grant.
The following table sets forth total return-based restricted stock activity:
Number of SharesWeighted Average Grant Date Fair Value
Restricted shares outstanding at December 31, 2017160,724 $44.72 
Awarded and issued (1)
77,456 40.81 
Vested (2)
(41,160)45.61 
Forfeited (3)
(16,926)45.24 
Restricted shares outstanding at December 31, 2018180,094 43.34 
Awarded and issued (1)
87,344 39.42 
Vested (2)
(45,901)43.68 
Forfeited (3)
(12,689)43.58 
Restricted shares outstanding at December 31, 2019208,848 42.22 
Awarded and issued (1)
66,188 38.31 
Forfeited (3)
(49,852)51.93 
Restricted shares outstanding at December 31, 2020225,184 $39.53 
__________
(1)The fair value at grant date of total return-based restricted stock issued during the years ended December 31, 2020, 2019 and 2018 was $2.5 million, $3.4 million and $3.2 million, respectively, at target.
(2)The vesting date fair value of total return-based restricted stock that vested during the years ended December 31, 2019 and 2018 was $2.1 million and $1.8 million, respectively, based on the performance of the specific plans. Vested shares include those shares surrendered by employees to satisfy tax withholding obligations in connection with such vesting. There were no vested shares of total return-based restricted stock during the year ended December 31, 2020.
(3)The 2020, 2019 and 2018 amounts include 46,852, 9,521 and 13,707 shares, respectively, that were forfeited at the end of the applicable measurement period because the applicable total return did not meet targeted levels.

401(k) Retirement Savings Plan

We have a 401(k) Retirement Savings Plan covering substantially all employees who meet certain age and employment criteria. We contribute amounts for each participant at a rate of 75% of the employee’s contribution (up to 6% of each employee’s bi-weekly salary and cash incentives, subject to statutory limits). During the years ended December 31, 2020, 2019 and 2018, we contributed $1.4 million, $1.5 million and $1.4 million, respectively, to the 401(k) savings plan. The assets of this qualified plan are not included in our Consolidated Financial Statements since the assets are not owned by us.

Retirement Plan

The Company has a retirement plan for employees with at least 30 years of continuous service or are at least 55 years old with at least 10 years of continuous service. Subject to advance written notice and a non-compete agreement, eligible retirees would be entitled to receive a pro rata amount of any annual non-equity incentive compensation earned during the year of retirement and stock options and time-based restricted stock would be non-forfeitable and vest according to the terms of their original grants. Eligible retirees would also be entitled to retain any total return-based restricted stock that subsequently vests after the retirement date according to the terms of their original grants. For employees who meet the age and service eligibility requirements, 100% of their annual grants are expensed at the grant date as if fully vested. For employees who will meet the age and service eligibility requirements within the normal vesting periods, the grants are amortized over the shorter service period.

Deferred Compensation

Prior to 2010, officers could elect to defer all or a portion of their cash compensation, which was then invested in unrelated mutual funds under a non-qualified deferred compensation plan. These investments are recorded at fair value, which aggregated $2.6 million and $2.3 million at December 31, 2020 and 2019, respectively, and are included in prepaid expenses and other assets, with an offsetting deferred compensation liability recorded in accounts payable, accrued expenses and other liabilities. Deferred amounts ultimately payable to the participants are based on the value of the related mutual fund investments. Accordingly, changes in the value of the unrelated mutual funds are recorded in interest and other income and the corresponding offsetting changes in the deferred compensation liability are recorded in general and administrative expense. As a result, there is no effect on our net income.
The following table sets forth our deferred compensation liability:

Year Ended December 31,
202020192018
Beginning deferred compensation liability$2,345 $1,849 $2,388 
Mark-to-market adjustment to deferred compensation (in general and administrative expenses)
228 496 (182)
Distributions from deferred compensation plans— — (357)
Total deferred compensation liability$2,573 $2,345 $1,849 

Employee Stock Purchase Plan

The Company has an Employee Stock Purchase Plan (“ESPP”) pursuant to which employees may contribute up to 25% of their cash compensation for the purchase of Common Stock. At the end of each quarter, each participant’s account balance, which includes accumulated dividends, is applied to acquire shares of Common Stock at a cost that is calculated at 85% of the average closing price on the NYSE on the five consecutive days preceding the last day of the quarter. In the years ended December 31, 2020, 2019 and 2018, the Company issued 47,208, 38,618 and 38,951 shares, respectively, of Common Stock under the ESPP. The 15% discount on newly issued shares, which is taxable income to the participants and is recorded by us as additional compensation expense, aggregated $0.3 million in each of the years ended December 31, 2020, 2019 and 2018. Generally, shares purchased under the ESPP must be held at least one year. The Company satisfies its ESPP obligations by issuing additional shares of Common Stock.
v3.20.4
Accumulated Other Comprehensive Income/(Loss)
12 Months Ended
Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income/(Loss) Accumulated Other Comprehensive Income/(Loss)
The following table sets forth the components of accumulated other comprehensive income/(loss):
December 31,
20202019
Cash flow hedges:
Beginning balance$(471)$9,913 
Unrealized losses on cash flow hedges(1,238)(9,134)
Amortization of cash flow hedges (1)
247 (1,250)
Total accumulated other comprehensive loss$(1,462)$(471)
__________
(1)    Amounts reclassified out of accumulated other comprehensive income/(loss) into interest expense.
v3.20.4
Real Estate and Other Assets Held For Sale
12 Months Ended
Dec. 31, 2020
Discontinued Operations and Disposal Groups [Abstract]  
Real Estate and Other Assets Held For Sale Real Estate and Other Assets Held For Sale
The following table sets forth the assets held for sale at December 31, 2020 and 2019, which are considered non-core:

December 31,
20202019
Assets:
Land$2,612 $4,815 
Buildings and tenant improvements12,238 29,581 
Less-accumulated depreciation(3,577)(16,775)
Net real estate assets11,273 17,621 
Accrued straight-line rents receivable— 2,073 
Deferred leasing costs, net87 1,096 
Real estate and other assets, net, held for sale$11,360 $20,790 
v3.20.4
Earnings Per Share and Per Unit
12 Months Ended
Dec. 31, 2020
Earnings Per Share [Abstract]  
Earnings Per Share and Per Unit Earnings Per Share and Per Unit
The following table sets forth the computation of basic and diluted earnings per share of the Company:

Year Ended December 31,
202020192018
Earnings per Common Share - basic:
Numerator:
Net income$357,914 $141,683 $177,630 
Net (income) attributable to noncontrolling interests in the Operating Partnership(9,338)(3,551)(4,588)
Net (income) attributable to noncontrolling interests in consolidated affiliates(1,174)(1,214)(1,207)
Dividends on Preferred Stock(2,488)(2,488)(2,492)
Net income available for common stockholders$344,914 $134,430 $169,343 
Denominator:
Denominator for basic earnings per Common Share – weighted average shares (1)
103,876 103,692 103,439 
Net income available for common stockholders$3.32 $1.30 $1.64 
Earnings per Common Share - diluted:
Numerator:
Net income$357,914 $141,683 $177,630 
Net (income) attributable to noncontrolling interests in consolidated affiliates(1,174)(1,214)(1,207)
Dividends on Preferred Stock(2,488)(2,488)(2,492)
Net income available for common stockholders before net (income) attributable to noncontrolling interests in the Operating Partnership$354,252 $137,981 $173,931 
Denominator:
Denominator for basic earnings per Common Share – weighted average shares (1)
103,876 103,692 103,439 
Add:
Stock options using the treasury method22 33 
Noncontrolling interests Common Units2,830 2,731 2,796 
Denominator for diluted earnings per Common Share – adjusted weighted average shares and assumed conversions106,714 106,445 106,268 
Net income available for common stockholders$3.32 $1.30 $1.64 
__________
(1)Includes all unvested restricted stock where dividends on such restricted stock are non-forfeitable.
The following table sets forth the computation of basic and diluted earnings per unit of the Operating Partnership:

Year Ended December 31,
202020192018
Earnings per Common Unit - basic:
Numerator:
Net income$357,914 $141,683 $177,630 
Net (income) attributable to noncontrolling interests in consolidated affiliates(1,174)(1,214)(1,207)
Distributions on Preferred Units(2,488)(2,488)(2,492)
Net income available for common unitholders$354,252 $137,981 $173,931 
Denominator:
Denominator for basic earnings per Common Unit – weighted average units (1)
106,297 106,014 105,826 
Net income available for common unitholders$3.33 $1.30 $1.64 
Earnings per Common Unit - diluted:
Numerator:
Net income$357,914 $141,683 $177,630 
Net (income) attributable to noncontrolling interests in consolidated affiliates(1,174)(1,214)(1,207)
Distributions on Preferred Units(2,488)(2,488)(2,492)
Net income available for common unitholders$354,252 $137,981 $173,931 
Denominator:
Denominator for basic earnings per Common Unit – weighted average units (1)
106,297 106,014 105,826 
Add:
Stock options using the treasury method22 33 
Denominator for diluted earnings per Common Unit – adjusted weighted average units and assumed conversions106,305 106,036 105,859 
Net income available for common unitholders$3.33 $1.30 $1.64 
__________
(1)Includes all unvested restricted stock where distributions on such restricted stock are non-forfeitable.
v3.20.4
Income Taxes
12 Months Ended
Dec. 31, 2020
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
Our Consolidated Financial Statements include the operations of the Company’s taxable REIT subsidiary, which is not entitled to the dividends paid deduction and is subject to federal, state and local income taxes on its taxable income.

The minimum dividend per share of Common Stock required for the Company to maintain its REIT status was $1.41, $1.44 and $1.26 per share in 2020, 2019 and 2018, respectively. Continued qualification as a REIT depends on the Company’s ability to satisfy the dividend distribution tests, stock ownership requirements and various other qualification tests. The tax basis of the Company’s assets (net of accumulated tax depreciation and amortization) and liabilities was approximately $4.7 billion and $2.8 billion, respectively, at December 31, 2020 and $4.7 billion and $2.9 billion, respectively, at December 31, 2019. The tax basis of the Operating Partnership’s assets (net of accumulated tax depreciation and amortization) and liabilities was approximately $4.6 billion and $2.8 billion, respectively, at December 31, 2020 and $4.7 billion and $2.9 billion, respectively, at December 31, 2019.

During the years ended December 31, 2020, 2019 and 2018, the Company qualified as a REIT and incurred no federal income tax expense; accordingly, the only federal income taxes included in the accompanying Consolidated Financial Statements relate to activities of the Company’s taxable REIT subsidiary.

The following table sets forth the Company’s income tax expense:

Year Ended December 31,
202020192018
Current tax expense:
Federal$110 $202 $133 
State240 148 112 
350 350 245 
Deferred tax expense/(benefit):
Federal(9)14 (95)
State(4)(120)(68)
(13)(106)(163)
Total income tax expense$337 $244 $82 

The Company’s net deferred tax liability was $0.1 million at both December 31, 2020 and 2019. The net deferred tax liability is comprised primarily of tax versus book differences related to property (depreciation, amortization and basis differences).
For the years ended December 31, 2020 and 2019, there were no unrecognized tax benefits. The Company is subject to federal, state and local income tax examinations by taxing authorities for 2017 through 2020. The Company does not expect that the total amount of unrecognized benefits will materially change within the next year.
v3.20.4
Segment Information
12 Months Ended
Dec. 31, 2020
Segment Reporting [Abstract]  
Segment Information Segment Information
Our principal business is the operation, acquisition and development of rental real estate properties. We evaluate our business by geographic location. The operating results by geographic grouping are regularly reviewed by our chief operating decision maker for assessing performance and other purposes. There are no material inter-segment transactions.

Our accounting policies of the segments are the same as those used in our Consolidated Financial Statements. All operations are within the United States.
The following tables summarize the rental and other revenues and net operating income, the primary industry property-level performance metric used by our chief operating decision maker and which is defined as rental and other revenues less rental property and other expenses, for each of our reportable segments. Our segment information as of December 31, 2019 and for the years ended December 31, 2019 and 2018 have been retrospectively revised from previously reported amounts to reflect a change in our reportable segments as a result of recent dispositions.
Year Ended December 31,
202020192018
Rental and Other Revenues:
Office:
Atlanta$146,704 $151,279 $141,337 
Charlotte35,733 4,650 — 
Nashville138,089 133,867 121,836 
Orlando49,459 52,679 53,771 
Pittsburgh58,518 60,755 61,177 
Raleigh128,189 122,173 118,352 
Richmond48,079 49,428 45,729 
Tampa99,520 86,431 102,404 
Total Office Segment704,291 661,262 644,606 
Other32,609 74,717 75,429 
Total Rental and Other Revenues$736,900 $735,979 $720,035 
Net Operating Income:
Office:
Atlanta$95,448 $97,019 $87,503 
Charlotte28,431 3,791 — 
Nashville99,901 97,386 88,554 
Orlando29,546 32,062 32,841 
Pittsburgh35,631 36,249 36,233 
Raleigh95,926 88,402 86,053 
Richmond33,667 33,756 31,276 
Tampa67,059 50,339 65,819 
Total Office Segment485,609 439,004 428,279 
Other 19,466 48,464 49,341 
Total Net Operating Income505,075 487,468 477,620 
Reconciliation to net income:
Depreciation and amortization(241,585)(254,504)(229,955)
Impairments of real estate assets(1,778)(5,849)(423)
General and administrative expenses(41,031)(44,067)(40,006)
Interest expense(80,962)(81,648)(71,422)
Other income/(loss)(1,707)(2,510)1,940 
Gains on disposition of property215,897 39,517 37,638 
Equity in earnings of unconsolidated affiliates4,005 3,276 2,238 
Net income$357,914 $141,683 $177,630 
December 31,
20202019
Total Assets:
Office:
Atlanta$1,011,807 $1,040,869 
Charlotte443,051 425,045 
Nashville1,191,219 1,045,125 
Orlando289,129 289,743 
Pittsburgh313,783 323,792 
Raleigh839,831 830,128 
Richmond240,976 246,546 
Tampa556,951 521,620 
Total Office Segment4,886,747 4,722,868 
Other322,670 415,376 
Total Assets$5,209,417 $5,138,244 
v3.20.4
Quarterly Financial Data (Unaudited)
12 Months Ended
Dec. 31, 2020
Quarterly Financial Data [Abstract]  
Quarterly Financial Data (Unaudited) Quarterly Financial Data (Unaudited)
The following tables set forth quarterly financial information of the Company:
Year Ended December 31, 2020
First
Quarter
Second
Quarter
Third
Quarter
Fourth
Quarter
Total
Rental and other revenues$192,800 $183,153 $181,043 $179,904 $736,900 
Net income191,340 38,956 42,331 85,287 357,914 
Net (income) attributable to noncontrolling interests in the Operating Partnership
(4,960)(1,017)(1,107)(2,254)(9,338)
Net (income) attributable to noncontrolling interests in consolidated affiliates
(285)(289)(298)(302)(1,174)
Dividends on Preferred Stock(622)(622)(622)(622)(2,488)
Net income available for common stockholders$185,473 $37,028 $40,304 $82,109 $344,914 
Earnings per Common Share – basic:
Net income available for common stockholders$1.79 $0.36 $0.39 $0.79 $3.32 
Earnings per Common Share – diluted:
Net income available for common stockholders$1.79 $0.36 $0.39 $0.79 $3.32 

Year Ended December 31, 2019
First
Quarter
Second
Quarter
Third
Quarter
Fourth
Quarter
Total
Rental and other revenues$172,363 $184,070 $187,475 $192,071 $735,979 
Net income8,386 41,394 29,557 62,346 141,683 
Net (income) attributable to noncontrolling interests in the Operating Partnership
(193)(1,044)(737)(1,577)(3,551)
Net (income) attributable to noncontrolling interests in consolidated affiliates
(316)(306)(297)(295)(1,214)
Dividends on Preferred Stock(622)(622)(622)(622)(2,488)
Net income available for common stockholders$7,255 $39,422 $27,901 $59,852 $134,430 
Earnings per Common Share – basic:
Net income available for common stockholders$0.07 $0.38 $0.27 $0.58 $1.30 
Earnings per Common Share – diluted:
Net income available for common stockholders$0.07 $0.38 $0.27 $0.58 $1.30 
The following tables set forth quarterly financial information of the Operating Partnership:

Year Ended December 31, 2020
First
Quarter
Second
Quarter
Third
Quarter
Fourth
Quarter
Total
Rental and other revenues$192,800 $183,153 $181,043 $179,904 $736,900 
Net income191,340 38,956 42,331 85,287 357,914 
Net (income) attributable to noncontrolling interests in consolidated affiliates
(285)(289)(298)(302)(1,174)
Distributions on Preferred Units(622)(622)(622)(622)(2,488)
Net income available for common unitholders$190,433 $38,045 $41,411 $84,363 $354,252 
Earnings per Common Unit – basic:
Net income available for common unitholders$1.79 $0.36 $0.39 $0.79 $3.33 
Earnings per Common Unit – diluted:
Net income available for common unitholders$1.79 $0.36 $0.39 $0.79 $3.33 

Year Ended December 31, 2019
First
Quarter
Second
Quarter
Third
Quarter
Fourth
Quarter
Total
Rental and other revenues$172,363 $184,070 $187,475 $192,071 $735,979 
Net income8,386 41,394 29,557 62,346 141,683 
Net (income) attributable to noncontrolling interests in consolidated affiliates
(316)(306)(297)(295)(1,214)
Distributions on Preferred Units(622)(622)(622)(622)(2,488)
Net income available for common unitholders$7,448 $40,466 $28,638 $61,429 $137,981 
Earnings per Common Unit – basic:
Net income available for common unitholders$0.07 $0.38 $0.27 $0.58 $1.30 
Earnings per Common Unit – diluted:
Net income available for common unitholders$0.07 $0.38 $0.27 $0.58 $1.30 
v3.20.4
Subsequent Events
12 Months Ended
Dec. 31, 2020
Subsequent Events [Abstract]  
Subsequent Events Subsequent Events
On January 15, 2021, we sold a building in Atlanta for a sale price of $30.7 million and expect to record a gain on disposition of property of $18.9 million.

On January 21, 2021, we acquired our joint venture partner’s 75.0% interest in the Forum, which owned five buildings in Raleigh encompassing 636,000 rentable square feet, for a purchase price of $131.3 million. We previously accounted for our 25.0% interest in this joint venture using the equity method of accounting. The assets and liabilities of the joint venture are now wholly owned and we have determined the acquisition constitutes an asset purchase. As such, because the Forum is not a variable interest entity, we expect to allocate our previously held equity interest at historical cost along with the consideration paid and acquisition costs to the assets acquired and liabilities assumed.

On February 2, 2021, the Company declared a cash dividend of $0.48 per share of Common Stock, which is payable on March 9, 2021 to stockholders of record as of February 16, 2021.

See also Note 8 for information regarding the potential impact of the COVID-19 pandemic in future periods. The severity and duration of the COVID-19 pandemic and the resulting economic recession and the future demand for office space over the long-term are difficult to predict and could materially and adversely impact or disrupt our financial condition, results of operations, cash flows and performance.
v3.20.4
Schedule III
12 Months Ended
Dec. 31, 2020
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]  
Schedule Of Real Estate And Accumulated Depreciation Note To Schedule III
HIGHWOODS PROPERTIES, INC.
HIGHWOODS REALTY LIMITED PARTNERSHIP

NOTE TO SCHEDULE III
(in thousands)

The following table sets forth the activity of real estate assets and accumulated depreciation:

December 31,
202020192018
Real estate assets:
Beginning balance$5,776,804 $5,296,551 $5,173,754 
Acquisitions, development and improvements259,470 677,842 274,863 
Cost of real estate sold and retired(441,441)(197,589)(152,066)
Ending balance (a)$5,594,833 $5,776,804 $5,296,551 
Accumulated depreciation:
Beginning balance$1,405,341 $1,296,562 $1,211,728 
Depreciation expense204,585 214,682 191,035 
Real estate sold and retired(187,970)(105,903)(106,201)
Ending balance (b)$1,421,956 $1,405,341 $1,296,562 

(a)Reconciliation of total real estate assets to balance sheet caption:
202020192018
Total per Schedule III$5,594,833 $5,776,804 $5,296,551 
Development in-process exclusive of land included in Schedule III259,681 172,706 165,537 
Real estate assets, net, held for sale(14,850)(34,396)— 
Total real estate assets$5,839,664 $5,915,114 $5,462,088 

(b)Reconciliation of total accumulated depreciation to balance sheet caption:
202020192018
Total per Schedule III$1,421,956 $1,405,341 $1,296,562 
Real estate assets, net, held for sale(3,577)(16,775)— 
Total accumulated depreciation$1,418,379 $1,388,566 $1,296,562 
Real Estate and Accumulated Depreciation Disclosure
(in thousands)

December 31, 2020

Initial CostsCosts Capitalized
Subsequent to
Acquisition
Gross Value at Close of Period
DescriptionProperty
Type
2020
Encumbrance
LandBldg &
Improv
LandBldg &
Improv
LandBldg &
Improv
Total
Assets (1)
Accumulated
Depreciation
Date of
Construction
Life on
Which
Depreciation
is
Calculated
Atlanta, GA
1700 Century CircleOffice$— $2,482 $$1,478 $$3,960 $3,962 $1,925 1983 5-40 yrs.
1800 Century BoulevardOffice1,444 29,081 — 11,265 1,444 40,346 41,790 24,040 1975 5-40 yrs.
1825 Century BoulevardOffice864 — 303 15,166 1,167 15,166 16,333 6,729 2002 5-40 yrs.
1875 Century BoulevardOffice— 8,924 — 8,329 — 17,253 17,253 8,706 1976 5-40 yrs.
1900 Century BoulevardOffice— 4,744 — 710 — 5,454 5,454 5,341 1971 5-40 yrs.
2200 Century ParkwayOffice— 14,432 — 9,059 — 23,491 23,491 11,732 1971 5-40 yrs.
2400 Century ParkwayOffice— — 406 14,776 406 14,776 15,182 7,686 1998 5-40 yrs.
2500 Century ParkwayOffice— — 328 12,684 328 12,684 13,012 4,589 2005 5-40 yrs.
2500/2635 Parking GarageOffice— — — 6,447 — 6,447 6,447 2,424 2005 5-40 yrs.
2600 Century ParkwayOffice— 10,679 — 4,244 — 14,923 14,923 7,898 1973 5-40 yrs.
2635 Century ParkwayOffice— 21,643 — 20,514 — 42,157 42,157 18,043 1980 5-40 yrs.
2800 Century ParkwayOffice— 20,449 — 10,653 — 31,102 31,102 17,782 1983 5-40 yrs.
50 GlenlakeOffice2,500 20,006 — 4,308 2,500 24,314 26,814 13,172 1997 5-40 yrs.
Century Plaza IOffice1,290 8,567 — 5,022 1,290 13,589 14,879 6,872 1981 5-40 yrs.
Century Plaza IIOffice1,380 7,733 — 3,108 1,380 10,841 12,221 5,559 1984 5-40 yrs.
5405 Windward ParkwayOffice3,342 32,111 — 19,729 3,342 51,840 55,182 26,543 1998 5-40 yrs.
Riverpoint - LandIndustrial7,250 — (4,439)718 2,811 718 3,529 185 N/A5-40 yrs.
Riverwood 100Office5,785 64,913 (29)26,071 5,756 90,984 96,740 23,842 19895-40 yrs.
Tradeport - LandIndustrial5,243 — (4,819)— 424 — 424 — N/A N/A
Two Alliance CenterOffice9,579 125,549 — 906 9,579 126,455 136,034 33,618 20095-40 yrs.
One Alliance CenterOffice14,775 123,071 — 17,587 14,775 140,658 155,433 32,298 20015-40 yrs.
10 Glenlake NorthOffice5,349 26,334 — 11,303 5,349 37,637 42,986 10,897 20005-40 yrs.
10 Glenlake SouthOffice5,103 22,811 — 3,523 5,103 26,334 31,437 7,056 19995-40 yrs.
Riverwood 200Office4,777 89,708 450 2,905 5,227 92,613 97,840 11,172 20175-40 yrs.
Riverwood 300 - LandOffice400 — — 710 400 710 1,110 70 N/A5-40 yrs.
Monarch TowerOffice22,717 143,068 — 17,074 22,717 160,142 182,859 25,234 19975-40 yrs.
Monarch PlazaOffice27,678 88,962 — 11,147 27,678 100,109 127,787 15,755 19835-40 yrs.
Charlotte, NC
Bank of America TowerOffice29,273 354,749 — 20,087 29,273 374,836 404,109 12,090 2019 5-40 yrs.
Initial CostsCosts Capitalized
Subsequent to
Acquisition
Gross Value at Close of Period
DescriptionProperty
Type
2020
Encumbrance
LandBldg &
Improv
LandBldg &
Improv
LandBldg &
Improv
Total
Assets (1)
Accumulated
Depreciation
Date of
Construction
Life on
Which
Depreciation
is
Calculated
Nashville, TN
3322 West EndOffice3,025 27,490 — 11,806 3,025 39,296 42,321 18,539 1986 5-40 yrs.
3401 West EndOffice5,862 22,917 — 6,566 5,862 29,483 35,345 16,114 1982 5-40 yrs.
5310 Maryland WayOffice1,863 7,201 — 3,809 1,863 11,010 12,873 6,540 1994 5-40 yrs.
Cool Springs I & II DeckOffice— — — 3,990 — 3,990 3,990 1,314 2007 5-40 yrs.
Cool Springs III & IV DeckOffice— — — 4,463 — 4,463 4,463 1,535 2007 5-40 yrs.
Cool Springs IOffice1,583 — 15 15,891 1,598 15,891 17,489 7,396 1999 5-40 yrs.
Cool Springs IIOffice1,824 — 346 24,705 2,170 24,705 26,875 10,089 1999 5-40 yrs.
Cool Springs IIIOffice1,631 — 804 16,241 2,435 16,241 18,676 5,698 2006 5-40 yrs.
Cool Springs IVOffice1,715 — — 19,221 1,715 19,221 20,936 6,131 2008 5-40 yrs.
Cool Springs V (Healthways)Office3,688 — 295 53,100 3,983 53,100 57,083 23,044 2007 5-40 yrs.
Harpeth On The Green IIOffice1,419 5,677 — 3,216 1,419 8,893 10,312 4,607 1984 5-40 yrs.
Harpeth On The Green IIIOffice1,660 6,649 — 2,263 1,660 8,912 10,572 5,015 1987 5-40 yrs.
Harpeth On The Green IVOffice1,713 6,842 — 3,171 1,713 10,013 11,726 5,598 1989 5-40 yrs.
Harpeth On The Green VOffice662 — 197 5,795 859 5,795 6,654 2,686 1998 5-40 yrs.
Hickory TraceOffice1,164 — 164 6,111 1,328 6,111 7,439 2,474 20015-40 yrs.
Highwoods Plaza IOffice1,552 — 307 9,951 1,859 9,951 11,810 5,020 1996 5-40 yrs.
Highwoods Plaza IIOffice1,448 — 307 9,600 1,755 9,600 11,355 4,988 1997 5-40 yrs.
Seven Springs IOffice2,076 — 592 13,216 2,668 13,216 15,884 5,916 2002 5-40 yrs.
SouthPointeOffice1,655 — 310 9,430 1,965 9,430 11,395 4,107 1998 5-40 yrs.
RampartsOffice2,394 12,806 — 10,313 2,394 23,119 25,513 9,057 1986 5-40 yrs.
Westwood SouthOffice2,106 — 382 12,317 2,488 12,317 14,805 6,168 1999 5-40 yrs.
100 Winners CircleOffice1,497 7,258 — 2,760 1,497 10,018 11,515 5,121 1987 5-40 yrs.
The Pinnacle at Symphony PlaceOffice93,350 — 141,469 — 6,406 — 147,875 147,875 36,904 2010 5-40 yrs.
Seven Springs East (LifePoint)Office2,525 37,587 — 192 2,525 37,779 40,304 8,512 2013 5-40 yrs.
The Shops at Seven SpringsOffice803 8,223 — 581 803 8,804 9,607 2,604 2013 5-40 yrs.
Seven Springs WestOffice2,439 51,306 — 1,995 2,439 53,301 55,740 7,947 2016 5-40 yrs.
Seven Springs IIOffice2,356 30,048 — 3,011 2,356 33,059 35,415 4,058 2017 5-40 yrs.
Bridgestone TowerOffice19,223 169,582 — 110 19,223 169,692 188,915 16,369 2017 5-40 yrs.
Virginia Springs IIOffice— — 4,821 21,578 4,821 21,578 26,399 70 20205-40 yrs.
MARS CampusOffice7,010 87,474 — 32 7,010 87,506 94,516 5,505 2019 5-40 yrs.
5501 Virginia WayOffice4,534 25,632 — 274 4,534 25,906 30,440 1,775 2018 5-40 yrs.
1100 Broadway - LandOffice29,845 — — — 29,845 — 29,845 — N/AN/A
Ovation - LandOffice31,063 — 104 — 31,167 — 31,167 — N/A N/A
Initial CostsCosts Capitalized
Subsequent to
Acquisition
Gross Value at Close of Period
DescriptionProperty
Type
2020
Encumbrance
LandBldg &
Improv
LandBldg &
Improv
LandBldg &
Improv
Total
Assets (1)
Accumulated
Depreciation
Date of
Construction
Life on
Which
Depreciation
is
Calculated
Broadway Stem - LandOffice— — 6,2186,218 — 6,218 — N/AN/A
Orlando, FL
Capital Plaza Three - LandOffice2,994 — 18 — 3,012 — 3,012 — N/A N/A
Eola Park - LandOffice2,027 — — — 2,027 — 2,027 — N/A N/A
The 1800 Eller Drive BuildingOffice— 9,851 — 3,526 — 13,377 13,377 9,158 1983 5-40 yrs.
Seaside PlazaOffice3,893 29,541 — 10,104 3,893 39,645 43,538 8,963 1982 5-40 yrs.
Capital Plaza TwoOffice4,346 43,394 — 8,433 4,346 51,827 56,173 12,253 1999 5-40 yrs.
Capital Plaza OneOffice3,482 27,321 — 7,668 3,482 34,989 38,471 7,387 1975 5-40 yrs.
Landmark Center TwoOffice4,743 22,031 — 9,352 4,743 31,383 36,126 7,595 1985 5-40 yrs.
Landmark Center OneOffice6,207 22,655 — 10,026 6,207 32,681 38,888 7,556 1983 5-40 yrs.
300 South OrangeOffice3,490 56,079 — 10,243 3,490 66,322 69,812 12,867 2000 5-40 yrs.
Eola CentreOffice3,758 11,160 — 12,739 3,758 23,899 27,657 3,710 1969 5-40 yrs.
Pittsburgh, PA
One PPG PlaceOffice9,819 107,643 — 51,500 9,819 159,143 168,962 51,382 1983-1985 5-40 yrs.
Two PPG PlaceOffice2,302 10,978 — 10,655 2,302 21,633 23,935 5,670 1983-1985 5-40 yrs.
Three PPG PlaceOffice501 2,923 — 4,680 501 7,603 8,104 2,737 1983-1985 5-40 yrs.
Four PPG PlaceOffice620 3,239 — 3,675 620 6,914 7,534 2,220 1983-1985 5-40 yrs.
Five PPG PlaceOffice803 4,924 — 3,168 803 8,092 8,895 2,828 1983-1985 5-40 yrs.
Six PPG PlaceOffice3,353 25,602 — 15,502 3,353 41,104 44,457 11,416 1983-1985 5-40 yrs.
EQT PlazaOffice16,457 83,812 — 15,175 16,457 98,987 115,444 25,863 1987 5-40 yrs.
East Liberty - LandOffice2,478 — — — 2,478 — 2,478 — N/A N/A
Raleigh, NC
3600 Glenwood AvenueOffice— 10,994 — 4,948 — 15,942 15,942 8,885 1986 5-40 yrs.
3737 Glenwood AvenueOffice— — 318 17,281 318 17,281 17,599 8,596 1999 5-40 yrs.
4800 North ParkOffice2,678 17,630 — 10,224 2,678 27,854 30,532 16,546 1985 5-40 yrs.
5000 North ParkOffice1,010 4,612 (49)2,674 961 7,286 8,247 4,078 1980 5-40 yrs.
801 Raleigh Corporate CenterOffice828 — 272 11,233 1,100 11,233 12,333 4,604 2002 5-40 yrs.
2500 Blue Ridge RoadOffice722 4,606 — 1,497 722 6,103 6,825 3,844 1982 5-40 yrs.
2418 Blue Ridge RoadOffice462 1,410 — 2,718 462 4,128 4,590 1,623 1988 5-40 yrs.
Cape FearOffice131 1,630 (2)(1,004)129 626 755 382 1979 5-40 yrs.
Catawba - LandOffice125 1,635 (2)(1,635)123 — 123 — N/AN/A
2000 CentreGreenOffice1,529 — (391)12,445 1,138 12,445 13,583 4,544 2000 5-40 yrs.
4000 CentreGreenOffice1,653 — (389)11,339 1,264 11,339 12,603 5,202 2001 5-40 yrs.
5000 CentreGreenOffice1,291 34,572 — 2,875 1,291 37,447 38,738 4,997 2017 5-40 yrs.
Initial CostsCosts Capitalized
Subsequent to
Acquisition
Gross Value at Close of Period
DescriptionProperty
Type
2020
Encumbrance
LandBldg &
Improv
LandBldg &
Improv
LandBldg &
Improv
Total
Assets (1)
Accumulated
Depreciation
Date of
Construction
Life on
Which
Depreciation
is
Calculated
3000 CentreGreenOffice1,779 — (397)14,505 1,382 14,505 15,887 4,860 2002 5-40 yrs.
1000 CentreGreenOffice1,280 — 55 12,888 1,335 12,888 14,223 3,736 2008 5-40 yrs.
CottonwoodOffice609 3,244 — 437 609 3,681 4,290 2,435 1983 5-40 yrs.
GlenLake - LandOffice13,003 — (9,924)114 3,079 114 3,193 56 N/A5-40 yrs.
GlenLake OneOffice924 — 1,324 22,714 2,248 22,714 24,962 10,176 2002 5-40 yrs.
GlenLake FourOffice1,659 — 493 20,311 2,152 20,311 22,463 7,243 2006 5-40 yrs.
GlenLake SixOffice941 — (365)20,118 576 20,118 20,694 6,532 2008 5-40 yrs.
701 Raleigh Corporate CenterOffice1,304 — 540 17,337 1,844 17,337 19,181 8,802 1996 5-40 yrs.
Highwoods CentreOffice531 — (267)7,981 264 7,981 8,245 4,290 1998 5-40 yrs.
Inveresk Parcel 2 - LandOffice657 — 38 103 695 103 798 14 N/A5-40 yrs.
4201 Lake Boone TrailOffice1,450 6,311 — 684 1,450 6,995 8,445 1,998 19985-40 yrs.
4620 Creekstone DriveOffice149 — 107 3,380 256 3,380 3,636 1,511 2001 5-40 yrs.
4825 Creekstone DriveOffice398 — 293 10,478 691 10,478 11,169 5,269 1999 5-40 yrs.
PamlicoOffice289 — — 9,188 289 9,188 9,477 7,209 1980 5-40 yrs.
751 Corporate CenterOffice2,665 16,939 — — 2,665 16,939 19,604 1,817 2018 5-40 yrs.
PNC PlazaOffice1,206 — — 70,389 1,206 70,389 71,595 24,643 20085-40 yrs.
4301 Lake Boone TrailOffice878 3,730 — 2,405 878 6,135 7,013 3,896 19905-40 yrs.
4207 Lake Boone TrailOffice362 1,818 — 1,407 362 3,225 3,587 2,130 19935-40 yrs.
2301 Rexwoods DriveOffice919 2,816 — 1,650 919 4,466 5,385 2,769 19925-40 yrs.
4325 Lake Boone TrailOffice586 — — 4,872 586 4,872 5,458 2,764 19955-40 yrs.
2300 Rexwoods DriveOffice1,301 — 184 8,129 1,485 8,129 9,614 2,938 19985-40 yrs.
4709 Creekstone DriveOffice469 4,038 23 5,383 492 9,421 9,913 3,081 19875-40 yrs.
4700 Six Forks RoadOffice666 2,665 — 1,180 666 3,845 4,511 2,356 19825-40 yrs.
4700 Homewood CourtOffice1,086 4,533 — 2,078 1,086 6,611 7,697 3,925 19835-40 yrs.
4800 Six Forks RoadOffice862 4,411 — 3,433 862 7,844 8,706 4,401 19875-40 yrs.
Smoketree TowerOffice2,353 11,743 — 6,818 2,353 18,561 20,914 10,951 19845-40 yrs.
4601 Creekstone DriveOffice255 — 217 6,221 472 6,221 6,693 3,545 19975-40 yrs.
Weston - LandOffice22,771 — (19,894)— 2,877 — 2,877 — N/AN/A
4625 Creekstone DriveOffice458 — 268 6,122 726 6,122 6,848 3,621 19955-40 yrs.
11000 Weston ParkwayOffice2,651 18,850 — 15,357 2,651 34,207 36,858 6,014 19985-40 yrs.
GlenLake FiveOffice2,263 30,264 — 3,693 2,263 33,957 36,220 8,605 20145-40 yrs.
11800 Weston ParkwayOffice826 13,188 — 13 826 13,201 14,027 2,836 20145-40 yrs.
CentreGreen CaféOffice41 3,509 — (2)41 3,507 3,548 533 20145-40 yrs.
CentreGreen Fitness CenterOffice27 2,322 — (1)27 2,321 2,348 353 20145-40 yrs.
Initial CostsCosts Capitalized
Subsequent to
Acquisition
Gross Value at Close of Period
DescriptionProperty
Type
2020
Encumbrance
LandBldg &
Improv
LandBldg &
Improv
LandBldg &
Improv
Total
Assets (1)
Accumulated
Depreciation
Date of
Construction
Life on
Which
Depreciation
is
Calculated
One City PlazaOffice11,288 68,375 — 26,766 11,288 95,141 106,429 20,423 19865-40 yrs.
Edison - LandOffice5,984 — 2,196 — 8,180 — 8,180 — N/AN/A
Charter SquareOffice7,267 65,881 — 4,913 7,267 70,794 78,061 10,208 20155-40 yrs.
MetLife Global Technology CampusOffice21,580 149,889 — (153)21,580 149,736 171,316 19,477 20155-40 yrs.
GlenLake SevenOffice— — 1,662 34,077 1,662 34,077 35,739 435 20205-40 yrs.
Hargett - LandOffice6,582 — 2,816 — 9,398 — 9,398 — N/AN/A
Other PropertyOther27,260 20,868 (6,084)96,118 21,176 116,986 138,162 50,227 N/A5-40 yrs.
Richmond, VA
4900 Cox RoadOffice1,324 5,311 15 3,731 1,339 9,042 10,381 5,460 1991 5-40 yrs.
Colonnade BuildingOffice1,364 6,105 — 2,462 1,364 8,567 9,931 3,885 2003 5-40 yrs.
Dominion Place - Pitts Parcel - LandOffice1,101 — (404)— 697 — 697 — N/A N/A
Markel 4521Office1,581 13,299 168 (396)1,749 12,903 14,652 6,260 1999 5-40 yrs.
Hamilton BeachOffice1,086 4,345 10 2,997 1,096 7,342 8,438 3,849 1986 5-40 yrs.
Highwoods CommonsOffice521 — 458 4,651 979 4,651 5,630 2,261 1999 5-40 yrs.
Highwoods OneOffice1,688 — 22 14,116 1,710 14,116 15,826 7,416 1996 5-40 yrs.
Highwoods TwoOffice786 — 226 10,292 1,012 10,292 11,304 3,936 1997 5-40 yrs.
Highwoods FiveOffice783 — 11 8,000 794 8,000 8,794 3,744 1998 5-40 yrs.
Highwoods PlazaOffice909 — 187 5,897 1,096 5,897 6,993 2,865 2000 5-40 yrs.
Innslake CenterOffice845 — 195 8,023 1,040 8,023 9,063 3,527 2001 5-40 yrs.
Highwoods CentreOffice1,205 4,825 — 1,967 1,205 6,792 7,997 3,505 1990 5-40 yrs.
Markel 4501Office1,300 13,259 213 (3,367)1,513 9,892 11,405 4,039 1998 5-40 yrs.
4600 Cox RoadOffice1,700 17,081 169 (3,450)1,869 13,631 15,500 5,576 1989 5-40 yrs.
North ParkOffice2,163 8,659 3,666 2,169 12,325 14,494 6,976 1989 5-40 yrs.
North Shore Commons IOffice951 — 137 12,624 1,088 12,624 13,712 6,525 2002 5-40 yrs.
North Shore Commons IIOffice2,067 — (89)10,848 1,978 10,848 12,826 3,873 2007 5-40 yrs.
North Shore Commons C - LandOffice1,497 — 55 10 1,552 10 1,562 N/A5-40 yrs.
North Shore Commons D - LandOffice1,261 — — — 1,261 — 1,261 — N/AN/A
Nuckols Corner - LandOffice1,259 — 231 — 1,490 — 1,490 — N/AN/A
One Shockoe PlazaOffice— — 356 21,530 356 21,530 21,886 10,372 1996 5-40 yrs.
Pavilion - LandOffice181 46 (181)(46)— — — — N/AN/A
Lake Brook CommonsOffice1,600 8,864 21 2,877 1,621 11,741 13,362 5,503 1996 5-40 yrs.
Sadler & Cox - LandOffice1,535 — 343 — 1,878 — 1,878 — N/A N/A
Highwoods ThreeOffice1,918 — 358 12,128 2,276 12,128 14,404 4,345 2005 5-40 yrs.
Stony Point VI (Virginia Urology)Office1,925 25,868 — (2)1,925 25,866 27,791 2,059 2018 5-40 yrs.
Initial CostsCosts Capitalized
Subsequent to
Acquisition
Gross Value at Close of Period
DescriptionProperty
Type
2020
Encumbrance
LandBldg &
Improv
LandBldg &
Improv
LandBldg &
Improv
Total
Assets (1)
Accumulated
Depreciation
Date of
Construction
Life on
Which
Depreciation
is
Calculated
Stony Point IOffice1,384 11,630 (267)4,115 1,117 15,745 16,862 8,432 1990 5-40 yrs.
Stony Point IIOffice1,240 — 103 13,296 1,343 13,296 14,639 6,534 1999 5-40 yrs.
Stony Point IIIOffice995 — — 10,762 995 10,762 11,757 5,361 2002 5-40 yrs.
Stony Point IVOffice955 — — 12,057 955 12,057 13,012 4,467 2006 5-40 yrs.
Virginia MutualOffice1,301 6,036 15 1,201 1,316 7,237 8,553 3,639 1996 5-40 yrs.
Waterfront PlazaOffice585 2,347 2,291 593 4,638 5,231 2,157 1988 5-40 yrs.
Innsbrook CentreOffice914 8,249 — 1,126 914 9,375 10,289 4,093 1987 5-40 yrs.
Elks Pass - LandOffice3,326 — — — 3,326 — 3,326 — N/AN/A
Tampa, FL
Meridian ThreeOffice2,673 16,470 — 5,930 2,673 22,400 25,073 7,048 19895-40 yrs.
Bayshore PlaceOffice2,276 11,817 — 3,632 2,276 15,449 17,725 7,269 1990 5-40 yrs.
5525 Gray StreetOffice4,054 — 406 23,977 4,460 23,977 28,437 8,606 2005 5-40 yrs.
Highwoods Preserve Building VOffice881 — — 25,368 881 25,368 26,249 11,031 2001 5-40 yrs.
Highwoods Bay Center IOffice3,565 — (64)38,263 3,501 38,263 41,764 12,745 2007 5-40 yrs.
HIW Bay Center II - LandOffice3,482 — — — 3,482 — 3,482 — N/AN/A
Highwoods Preserve Building VIIOffice790 — — 16,996 790 16,996 17,786 4,481 2007 5-40 yrs.
HIW Preserve VII GarageOffice— — — 6,932 — 6,932 6,932 2,367 2007 5-40 yrs.
HorizonOffice— 6,257 — 4,443 — 10,700 10,700 5,546 1980 5-40 yrs.
LakePointe OneOffice2,106 89 — 41,475 2,106 41,564 43,670 23,659 1986 5-40 yrs.
LakePointe TwoOffice2,000 15,848 672 15,211 2,672 31,059 33,731 15,976 1999 5-40 yrs.
LakesideOffice— 7,369 — 7,726 — 15,095 15,095 7,504 1978 5-40 yrs.
Lakeside/Parkside GarageOffice— — — 5,732 — 5,732 5,732 2,455 2004 5-40 yrs.
One Harbour PlaceOffice2,016 25,252 — 16,693 2,016 41,945 43,961 18,333 1985 5-40 yrs.
ParksideOffice— 9,407 — 3,231 — 12,638 12,638 6,111 1979 5-40 yrs.
PavilionOffice— 16,394 — 6,071 — 22,465 22,465 12,081 1982 5-40 yrs.
Pavilion Parking GarageOffice— — — 5,801 — 5,801 5,801 3,038 1999 5-40 yrs.
SpectrumOffice1,454 14,502 — 4,751 1,454 19,253 20,707 10,099 1984 5-40 yrs.
Tower PlaceOffice3,218 19,898 — 6,948 3,218 26,846 30,064 14,011 1988 5-40 yrs.
Westshore SquareOffice1,126 5,186 — 1,706 1,126 6,892 8,018 3,687 1976 5-40 yrs.
Independence Park - LandOffice4,943 — 5,058 2,227 10,001 2,227 12,228 214 N/A5-40 yrs.
Independence OneOffice2,531 4,526 — 5,741 2,531 10,267 12,798 5,104 1983 5-40 yrs.
Meridian OneOffice1,849 22,363 — 3,187 1,849 25,550 27,399 6,028 1984 5-40 yrs.
Meridian TwoOffice1,302 19,588 — 5,425 1,302 25,013 26,315 6,064 1986 5-40 yrs.
5332 Avion DriveOffice— — 6,310 39,358 6,310 39,358 45,668 3,937 2016 5-40 yrs.
Initial CostsCosts Capitalized
Subsequent to
Acquisition
Gross Value at Close of Period
DescriptionProperty
Type
2020
Encumbrance
LandBldg &
Improv
LandBldg &
Improv
LandBldg &
Improv
Total
Assets (1)
Accumulated
Depreciation
Date of
Construction
Life on
Which
Depreciation
is
Calculated
Suntrust Financial CentreOffice1,980 102,138 — 25,020 1,980 127,158 129,138 20,758 1992 5-40 yrs.
Suntrust Financial - LandOffice2,225 — — — 2,225 — 2,225 — N/AN/A
$606,086 $3,274,841 $(5,128)$1,719,034 $600,958 $4,993,875 $5,594,833 $1,421,956 
__________
(1)The cost basis for income tax purposes of aggregate land and buildings and tenant improvements as of December 31, 2020 is $5.5 billion.
v3.20.4
Description of Business and Significant Accounting Policies (Policies)
12 Months Ended
Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Basis of Presentation
Basis of Presentation

Our Consolidated Financial Statements are prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”).

The Company’s Consolidated Financial Statements include the Operating Partnership, wholly owned subsidiaries and those entities in which the Company has the controlling interest. The Operating Partnership’s Consolidated Financial Statements include wholly owned subsidiaries and those entities in which the Operating Partnership has the controlling interest. We consolidate joint venture investments, such as interests in partnerships and limited liability companies, when we control the major operating and financial policies of the investment through majority ownership, in our capacity as a general partner or managing member or through some other contractual right. At December 31, 2020, three properties owned through a joint venture investment were consolidated. We also consolidate those entities deemed to be variable interest entities in which we are determined to be the primary beneficiary. At December 31, 2020, we have involvement with, and are the primary beneficiary in, an entity that we concluded to be a variable interest entity (see Note 4).

In addition, during 2019, we acquired a building using a special purpose entity owned by a qualified intermediary to facilitate a potential Section 1031 reverse exchange under the Internal Revenue Code. We determined that this entity was a variable interest entity of which we were the primary beneficiary and therefore, we consolidated this entity as of December 31, 2019. During 2020, we completed the exchange by acquiring 100% of the special purpose entity.

All intercompany transactions and accounts have been eliminated.

Certain amounts within the Consolidated Statements of Income for the year ended December 31, 2018 were removed and/or combined to conform to the current year presentation.
Use of Estimates
Use of Estimates

The preparation of consolidated financial statements in accordance with GAAP requires us to make estimates and assumptions that affect the amounts reported in our Consolidated Financial Statements and accompanying notes. Actual results could differ from those estimates.
Insurance
Insurance

We are primarily self-insured for health care claims for participating employees. We have stop-loss coverage to limit our exposure to significant claims on a per claim and annual aggregate basis. We determine our liabilities for claims, including incurred but not reported losses, based on all relevant information, including actuarial estimates of claim liabilities. At December 31, 2020, a reserve of $0.5 million was recorded to cover estimated reported and unreported claims.
Real Estate and Related Assets
Real Estate and Related Assets

Real estate and related assets are recorded at cost and stated at cost less accumulated depreciation. Renovations, replacements and other expenditures that improve or extend the life of assets are capitalized and depreciated over their estimated useful lives. Expenditures for ordinary maintenance and repairs are charged to expense as incurred. Depreciation is computed using the straight-line method over the estimated useful life of 40 years for buildings and depreciable land infrastructure costs, 15 years for building improvements and five to seven years for furniture, fixtures and equipment. Tenant improvements are amortized using the straight-line method over the initial fixed terms of the respective leases, which generally are from three to 10 years. Depreciation expense for real estate assets was $204.6 million, $214.7 million and $191.0 million for the years ended December 31, 2020, 2019 and 2018, respectively.

Expenditures directly related to the development and construction of real estate assets are included in net real estate assets and are stated at depreciated cost. Development expenditures include pre-construction costs essential to the development of properties, development and construction costs, interest costs on qualifying assets, real estate taxes, development personnel salaries and related costs and other costs incurred during the period of development. Interest and other carrying costs are capitalized until the building is ready for its intended use, but not later than a year from cessation of major construction activity. We consider a construction project as substantially completed and ready for its intended use upon the completion of tenant improvements. We cease capitalization on the portion that is substantially completed and occupied or held available for occupancy and capitalize only those costs associated with the portion under construction.

We record liabilities for the performance of asset retirement activities when the obligation to perform such activities is probable even when uncertainty exists about the timing and/or method of settlement.

Upon the acquisition of real estate assets accounted for as asset acquisitions, we assess the fair value of acquired tangible assets such as land, buildings and tenant improvements, intangible assets and liabilities such as above and below market leases, acquired in-place leases and other identifiable intangible assets and assumed liabilities. We allocate fair value on a relative basis based on estimated cash flow projections that utilize discount and/or capitalization rates as well as available market information. The fair value of the tangible assets of an acquired property considers the value of the property as if it were vacant.

The above and below market rate portions of leases acquired in connection with property acquisitions are recorded in deferred leasing costs and in accounts payable, accrued expenses and other liabilities, respectively, at fair value and amortized into rental revenue over the remaining term of the respective leases as described below. Fair value is calculated as the present value of the difference between (1) the contractual amounts to be paid pursuant to each in-place lease and (2) our estimate of fair market lease rates for each corresponding in-place lease, using a discount rate that reflects the risks associated with the leases acquired and measured over a period equal to the remaining initial term of the lease for above-market leases and the remaining initial term plus the term of any renewal option that the customer would be economically compelled to exercise for below-market leases.

In-place leases acquired are recorded at fair value in deferred leasing costs and amortized to depreciation and amortization expense over the remaining term of the respective lease. The value of in-place leases is based on our evaluation of the specific characteristics of each customer’s lease. Factors considered include estimates of carrying costs during hypothetical expected lease-up periods, current market conditions, the customer’s credit quality and costs to execute similar leases. In estimating carrying costs, we include real estate taxes, insurance and other operating expenses and estimates of lost rentals at market rates during the expected lease-up periods, depending on local market conditions. In estimating costs to execute similar leases, we consider tenant improvements, leasing commissions and legal and other related expenses.
Real estate and other assets are classified as long-lived assets held for use or as long-lived assets held for sale. Real estate is classified as held for sale when the sale of the asset is probable, has been duly approved by the Company, a legally enforceable contract has been executed and the buyer’s due diligence period, if any, has expired.
Impairments of Real Estate Assets and Investments in Unconsolidated Affiliates
Impairments of Real Estate Assets and Investments in Unconsolidated Affiliates

With respect to assets classified as held for use, we perform an impairment analysis if our evaluation of events or changes in circumstances indicate that the carrying value may not be recoverable, such as a significant decline in occupancy, identification of materially adverse legal or environmental factors, change in our designation of an asset from core to non-core, which may impact the anticipated holding period, or a decline in market value to an amount less than cost. This analysis is generally performed at the property level, except when an asset is part of an interdependent group such as an office park, and consists of determining whether the asset’s carrying amount will be recovered from its undiscounted estimated future operating and residual cash flows. These cash flows are estimated based on a number of assumptions that are subject to economic and market uncertainties including, among others, demand for space, competition for customers, changes in market rental rates, costs to operate each property and expected ownership periods. For properties under development, the cash flows are based on expected service potential of the asset or asset group when development is substantially complete.

If the carrying amount of a held for use asset exceeds the sum of its undiscounted future operating and residual cash flows, an impairment loss is recorded for the difference between estimated fair value of the asset and the carrying amount. We generally estimate the fair value of assets held for use by using discounted cash flow analyses. In some instances, appraisal information may be available and is used in addition to a discounted cash flow analysis. As the factors used in generating these cash flows are difficult to predict and are subject to future events that may alter our assumptions, the discounted and/or undiscounted future operating and residual cash flows estimated by us in our impairment analyses or those established by appraisal may not be achieved and we may be required to recognize future impairment losses on properties held for use.

We record assets held for sale at the lower of the carrying amount or estimated fair value. Fair value of assets held for sale is equal to the estimated or contracted sales price with a potential buyer, less costs to sell. The impairment loss is the amount by which the carrying amount exceeds the estimated fair value.

We also analyze our investments in unconsolidated affiliates for impairment. This analysis consists of determining whether an expected loss in market value of an investment is other than temporary by evaluating the length of time and the extent to which the market value has been less than cost, the financial condition and near-term prospects of the investment, and our intent and ability to retain our investment for a period of time sufficient to allow for any anticipated recovery in market value. As the factors used in this analysis are difficult to predict and are subject to future events that may alter our assumptions, we may be required to recognize future impairment losses on our investments in unconsolidated affiliates.
Sales of Real Estate
Sales of Real Estate

For sales of real estate where we have collected the consideration to which we are entitled in exchange for transferring the real estate, the related assets and liabilities are removed from the balance sheet and the resultant gain or loss is recorded in the period the transaction closes. Any post-sale involvement is accounted for as separate performance obligations and when the separate performance obligations are satisfied, the sales price allocated to each is recognized.
Discontinued Operations Discontinued OperationsProperties that are sold or classified as held for sale are classified as discontinued operations provided that the disposal represents a strategic shift that has (or will have) a major effect on our operations and financial results. Interest expense is included in discontinued operations if a related loan securing the sold property is to be paid off or assumed by the buyer in connection with the sale.
Investments in Unconsolidated Affiliates
Investments in Unconsolidated Affiliates

We account for our joint venture investments using the equity method of accounting when our interests represent a general partnership interest but substantive participating rights or substantive kick out rights have been granted to the limited partners or when our interests do not represent a general partnership interest and we do not control the major operating and financial policies of the investment. These investments are initially recorded at cost as investments in unconsolidated affiliates and are
subsequently adjusted for our share of earnings and cash contributions and distributions. To the extent our cost basis at formation of the joint venture is different than the basis reflected at the joint venture level, the basis difference is amortized over the life of the related assets and included in our share of equity in earnings of unconsolidated affiliates.
Cash Equivalents
Cash Equivalents

We consider highly liquid investments with an original maturity of three months or less when purchased to be cash equivalents.
Restricted Cash
Restricted Cash

Restricted cash represents cash deposits that are legally restricted or held by third parties on our behalf, such as construction-related escrows, property disposition proceeds set aside and designated or intended to fund future tax-deferred exchanges of qualifying real estate investments and escrows and reserves for debt service, real estate taxes and property insurance established pursuant to certain mortgage financing arrangements.
Redeemable Common Units and Preferred Units
Redeemable Common Units and Preferred Units

Limited partners holding Common Units other than the Company (“Redeemable Common Units”) have the right to put any and all of the Common Units to the Operating Partnership and the Company has the right to put any and all of the Preferred Units to the Operating Partnership in exchange for their liquidation preference plus accrued and unpaid distributions in the event of a corresponding redemption by the Company of the underlying Preferred Stock. Consequently, these Redeemable Common Units and Preferred Units are classified outside of permanent partners’ capital in the Operating Partnership’s accompanying balance sheets. The recorded value of the Redeemable Common Units is based on fair value at the balance sheet date as measured by the closing price of Common Stock on that date multiplied by the total number of Redeemable Common Units outstanding. The recorded value of the Preferred Units is based on their redemption value.
Income Tax
Income Taxes

The Company has elected and expects to continue to qualify as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the “Code”). A corporate REIT is a legal entity that holds real estate assets and, through the payment of dividends to stockholders, is generally permitted to reduce or avoid the payment of federal and state income taxes at the corporate level. To maintain qualification as a REIT, the Company is required to pay dividends to its stockholders equal to at least 90.0% of its annual REIT taxable income, excluding net capital gains. The partnership agreement requires the Operating Partnership to pay economically equivalent distributions on outstanding Common Units at the same time that the Company pays dividends on its outstanding Common Stock.

Other than income taxes related to its taxable REIT subsidiary, the Operating Partnership does not reflect any federal income taxes in its financial statements, since as a partnership the taxable effects of its operations are attributed to its partners. The Operating Partnership does record state income tax for states that tax partnership income directly.

We conduct certain business activities through a taxable REIT subsidiary, as permitted under the Code. The taxable REIT subsidiary is subject to federal, state and local income taxes on its taxable income. We record provisions for income taxes based on its income recognized for financial statement purposes, including the effects of differences between such income and the amount recognized for tax purposes.
Concentration of Credit Risk
Concentration of Credit Risk

At December 31, 2020, properties that we wholly own were leased to 1,378 customers. The geographic locations that comprise greater than 10.0% of our rental and other revenues are Atlanta, Nashville, Raleigh and Tampa. Our customers engage in a wide variety of businesses. No single customer generated more than 5% of our consolidated revenues during 2020.
We maintain our cash and cash equivalents and our restricted cash at financial or other intermediary institutions. The combined account balances at each institution may exceed FDIC insurance coverage and, as a result, there is a concentration of credit risk related to amounts on deposit in excess of FDIC insurance coverage. Additionally, from time to time in connection with tax-deferred 1031 transactions, our restricted cash balances may be commingled with other funds being held by any such intermediary institution, which would subject our balance to the credit risk of the institution.
Derivative Financial Instruments
Derivative Financial Instruments

We borrow funds at a combination of fixed and variable rates. Borrowings under our revolving credit facility and bank term loans bear interest at variable rates. Our long-term debt, which consists of secured and unsecured long-term financings, typically bears interest at fixed rates. Our interest rate risk management objectives are to limit generally the impact of interest rate changes on earnings and cash flows and lower our overall borrowing costs. To achieve these objectives, from time to time, we enter into interest rate hedge contracts such as collars, swaps, caps and treasury lock agreements in order to mitigate our interest rate risk with respect to existing and prospective debt instruments. We generally do not hold or issue these derivative contracts for trading or speculative purposes. The interest rate on all of our variable rate debt is generally adjusted at one or three month intervals, subject to settlements under these interest rate hedge contracts.

Interest rate swaps involve the receipt of variable rate amounts from a counterparty in exchange for making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. Changes in the fair value of derivatives designated and that qualify as cash flow hedges are recorded in accumulated other comprehensive income/(loss) and are subsequently reclassified into interest expense as interest payments are made on our debt.

We account for terminated derivative instruments by recognizing the related accumulated other comprehensive income/(loss) balance in current earnings, unless the hedged forecasted transaction continues as originally planned, in which case we continue to amortize the accumulated other comprehensive income/(loss) into earnings over the originally designated hedge period.
Earnings Per Share and Per Unit
Earnings Per Share and Per Unit

Basic earnings per share of the Company is computed by dividing net income available for common stockholders by the weighted Common Shares outstanding - basic. Diluted earnings per share is computed by dividing net income available for common stockholders (inclusive of noncontrolling interests in the Operating Partnership) by the weighted Common Shares outstanding - basic plus the dilutive effect of options, warrants and convertible securities outstanding, including Common Units, using the treasury stock method. Weighted Common Shares outstanding - basic includes all unvested restricted stock where dividends received on such restricted stock are non-forfeitable.

Basic earnings per unit of the Operating Partnership is computed by dividing net income available for common unitholders by the weighted Common Units outstanding - basic. Diluted earnings per unit is computed by dividing net income available for common unitholders by the weighted Common Units outstanding - basic plus the dilutive effect of options and warrants, using the treasury stock method. Weighted Common Units outstanding - basic includes all of the Company’s unvested restricted stock where distributions received on such restricted stock are non-forfeitable.
Recently Issued Accounting Standards
Recently Issued Accounting Standards

The Financial Accounting Standards Board (“FASB”) issued an accounting standards update (“ASU”) that changes certain disclosure requirements for fair value measurements. We adopted the ASU as of January 1, 2020 with no material effect on our Notes to Consolidated Financial Statements.

The FASB issued an ASU that provides temporary optional expedients and exceptions to the guidance on contract modifications and hedge accounting to ease the financial reporting burdens related to the expected market transition from LIBOR and other interbank offered rates to alternative reference rates, such as the Secured Overnight Financing Rate (“SOFR”). Entities can elect not to apply certain modification accounting requirements to contracts affected by reference rate reform, if certain criteria are met. An entity that makes this election would not have to remeasure the contracts at the modification date or reassess a previous accounting determination. Entities can also elect various optional expedients that would allow them to continue applying hedge accounting for hedging relationships affected by reference rate reform, if certain criteria are met. The guidance in this ASU is optional and may be elected over the period March 12, 2020 through December 31, 2022 as reference rate reform activities occur. We will continue to evaluate the impact of this ASU; however, we currently expect to avail ourselves of such optional expedients and exceptions should our modified contracts meet the required criteria.

Due to the business disruptions and challenges severely affecting the global economy caused by the COVID-19 pandemic, lessors may provide rent deferrals and other lease concessions to lessees. In April 2020, the FASB staff issued a question and answer document (the “Lease Modification Q&A”) focused on the application of lease accounting guidance to lease concessions provided as a result of the COVID-19 pandemic. Under existing lease guidance, we would have to determine, on a lease by lease basis, if a lease concession was the result of a new arrangement reached with the tenant (treated within the lease modification accounting framework) or if a lease concession was under the enforceable rights and obligations within the existing lease agreement (precluded from applying the lease modification accounting framework). The Lease Modification
Q&A allows us, if certain criteria have been met, to bypass the lease by lease analysis, and instead elect to either apply the lease modification accounting framework or not, with such election applied consistently to leases with similar characteristics and similar circumstances. We have elected the practical expedient and will not apply lease modification accounting on a lease by lease basis where applicable. As a result, $3.7 million of deferred rent is included in accounts receivable on our Consolidated Balance Sheets at December 31, 2020.
v3.20.4
Leases (Policies)
12 Months Ended
Dec. 31, 2020
Leases [Abstract]  
Leases Leases
On January 1, 2019, we adopted Accounting Standards Codification Topic 842 “Leases” (“ASC 842”), which supersedes Accounting Standards Codification Topic 840 “Leases” (“ASC 840”). Information in this Note 2 with respect to our leases and lease related costs as both lessee and lessor and lease related receivables as lessor is presented under ASC 842 as of and for the years ended December 31, 2020 and 2019 and under ASC 840 for the year ended December 31, 2018.

We adopted ASC 842 using the modified retrospective approach whereby the cumulative effect of adoption was recognized on the adoption date and prior periods were not restated. There was no net cumulative effect adjustment to retained earnings as of January 1, 2019 as a result of this adoption. ASC 842 sets out the principles for the recognition, measurement, presentation and disclosure of leases for both lessees and lessors. We operate as both a lessor and a lessee. As a lessor, we are required under ASC 842 to account for leases using an approach that is substantially equivalent to ASC 840’s guidance for operating leases and other leases such as sales-type leases and direct financing leases. In addition, ASC 842 requires lessors to capitalize and amortize only incremental direct leasing costs. As a lessee, we are required under the new standard to apply a dual approach, classifying leases, such as ground leases, as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase. This classification determines whether lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. ASC 842 also requires lessees to record a right of use asset and a lease liability for all leases with a term of greater than a year regardless of their classification. We have also elected the practical expedient not to recognize right of use assets and lease liabilities for leases with a term of a year or less.

On adoption of the standard, we elected the package of practical expedients provided for in ASC 842, including:

No reassessment of whether any expired or existing contracts were or contained leases;

No reassessment of the lease classification for any expired or existing leases; and

No reassessment of initial direct costs for any existing leases.

The package of practical expedients was made as a single election and was consistently applied to all existing leases as of January 1, 2019. We also elected the practical expedient provided to lessors in a subsequent amendment to ASC 842 that removed the requirement to separate lease and nonlease components, provided certain conditions were met.
v3.20.4
Leases (Tables)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Lessor, Operating Leases, ASC 842 Disclosure The following table sets forth the undiscounted cash flows for future minimum base rents to be received from customers for leases in effect at December 31, 2020 for the properties that we wholly own:
2021$623,888 
2022619,530 
2023570,417 
2024513,483 
2025432,272 
Thereafter2,049,545 
$4,809,135 
 
Allowance For Doubtful Accounts  
The following table sets forth the activity of allowance for doubtful accounts:
Balance at December 31, 2017AdditionsDeductionsBalance at December 31, 2018
Allowance for Doubtful Accounts - Straight-Line Rent$819 $599 $(777)$641 
Allowance for Doubtful Accounts - Accounts Receivable753 969 (556)1,166 
Allowance for Doubtful Accounts - Notes Receivable72 — (28)44 
Totals$1,644 $1,568 $(1,361)$1,851 
Lessee, Operating Leases, ASC 842 Disclosure
The following table sets forth the undiscounted cash flows of our scheduled obligations for future minimum payments on operating ground leases at December 31, 2020 and a reconciliation of those cash flows to the operating lease liability at December 31, 2020:

2021$2,127 
20222,169 
20232,167 
20242,123 
20252,170 
Thereafter81,527 
92,283 
Discount(57,892)
Lease liability$34,391 
 
v3.20.4
Investments In and Advances To Affiliates (Tables)
12 Months Ended
Dec. 31, 2020
Equity Method Investments and Joint Ventures [Abstract]  
Schedule of Equity Method Investments
The following table sets forth our ownership in unconsolidated affiliates at December 31, 2020:
Joint VentureLocationOwnership
Interest
Plaza Colonnade, Tenant-in-CommonKansas City50.0%
Kessinger/Hunter & Company, LCKansas City26.5%
Highwoods DLF Forum, LLC (1)
Raleigh25.0%
__________
(1)We acquired our joint venture partner’s 75.0% interest in our Highwoods DLF Forum, LLC joint venture (the “Forum”) in the first quarter of 2021. See Note 19.
Schedule of Variable Interest Entities The following table sets forth the assets and liabilities of the Midtown One joint venture included on our Consolidated Balance Sheets:
December 31,
2020
Development in-process$46,873 
Deferred leasing costs$196 
Prepaid expenses and other assets$75 
Accounts payable, accrued expenses and other liabilities$2,693 
v3.20.4
Intangible Assets and Below Market Lease Liabilities (Tables)
12 Months Ended
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Total Intangible Assets and Below Market Lease Liabilities
The following table sets forth total intangible assets and acquisition-related below market lease liabilities, net of accumulated amortization:
December 31,
20202019
Assets:
Deferred leasing costs (including lease incentives and above market lease and in-place lease acquisition-related intangible assets)
$361,027 $377,472 
Less accumulated amortization(151,698)(146,125)
$209,329 $231,347 
Liabilities (in accounts payable, accrued expenses and other liabilities):
Acquisition-related below market lease liabilities$63,748 $65,971 
Less accumulated amortization(37,838)(34,014)
$25,910 $31,957 
Amortization of Intangible Assets and Below Market Lease Liabilities
The following table sets forth amortization of intangible assets and below market lease liabilities:

Year Ended December 31,
202020192018
Amortization of deferred leasing costs and acquisition-related intangible assets (in depreciation and amortization)
$34,401 $37,386 $36,486 
Amortization of lease incentives (in rental and other revenues)$1,847 $4,281 $1,908 
Amortization of acquisition-related intangible assets (in rental and other revenues)
$1,137 $1,290 $1,677 
Amortization of acquisition-related intangible assets (in rental property and other expenses)
$510 $557 $557 
Amortization of acquisition-related below market lease liabilities (in rental and other revenues)
$(6,031)$(6,633)$(6,085)
Scheduled Future Amortization of Intangible Assets and Below Market Lease Liabilities
The following table sets forth scheduled future amortization of intangible assets and below market lease liabilities:

Years Ending December 31,Amortization
of Deferred Leasing Costs and Acquisition-Related Intangible Assets (in Depreciation and Amortization)
Amortization
of Lease Incentives (in Rental and Other Revenues)
Amortization
of Acquisition-Related Intangible Assets (in Rental and Other Revenues)
Amortization
of Acquisition-Related Below Market Lease Liabilities (in Rental and Other Revenues)
2021$34,063 $1,563 $711 $(4,958)
202230,011 1,353 601 (3,977)
202326,496 1,279 447 (3,600)
202423,348 1,133 373 (2,932)
202519,224 1,064 342 (1,673)
Thereafter60,979 4,523 1,819 (8,770)
$194,121 $10,915 $4,293 $(25,910)
Weighted average remaining amortization periods as of December 31, 2020 (in years)8.39.59.78.6
v3.20.4
Mortgages and Notes Payable (Tables)
12 Months Ended
Dec. 31, 2020
Debt Disclosure [Abstract]  
Schedule of Consolidated Mortgages and Notes Payable
Our mortgages and notes payable consisted of the following:
December 31,
20202019
Secured indebtedness:
4.00% mortgage loan due 2029 (1)
$93,350 $95,303 
93,350 95,303 
Unsecured indebtedness:
3.20% (3.363% effective rate) notes due 2021 (2)
149,901 299,369 
3.625% (3.752% effective rate) notes due 2023 (3)
249,464 249,201 
3.875% (4.038% effective rate) notes due 2027 (4)
297,534 297,134 
4.125% (4.271% effective rate) notes due 2028 (5)
347,035 346,621 
4.20% (4.234% effective rate) notes due 2029 (6)
349,189 349,091 
3.050% (3.079% effective rate) notes due 2030 (7)
399,106 399,009 
2.600% (2.645% effective rate) notes due 2031 (8)
398,423 — 
Variable rate term loan due 2022 (9)
— 100,000 
Variable rate term loan due 2022 (10)
200,000 200,000 
Revolving credit facility due 2022— 221,000 
2,390,652 2,461,425 
Less-unamortized debt issuance costs(13,981)(13,018)
Total mortgages and notes payable, net$2,470,021 $2,543,710 
__________
(1)Our secured mortgage loan was collateralized by real estate assets with an undepreciated book value of $147.9 million at December 31, 2020. We paid down $2.0 million of secured loan balances through principal amortization during 2020.
(2)Net of unamortized original issuance discount of $0.1 million and $0.6 million as of December 31, 2020 and 2019, respectively.
(3)Net of unamortized original issuance discount of $0.5 million and $0.8 million as of December 31, 2020 and 2019, respectively.
(4)Net of unamortized original issuance discount of $2.5 million and $2.9 million as of December 31, 2020 and 2019, respectively.
(5)Net of unamortized original issuance discount of $3.0 million and $3.4 million as of December 31, 2020 and 2019, respectively.
(6)Net of unamortized original issuance discount of $0.8 million and $0.9 million as of December 31, 2020 and 2019, respectively.
(7)Net of unamortized original issuance discount of $0.9 million and $1.0 million as of December 31, 2020 and 2019, respectively.
(8)Net of unamortized original issuance discount of $1.6 million as of December 31, 2020.
(9)This debt was repaid in 2020.
(10)As more fully described in Note 7, we entered into floating-to-fixed interest rate swaps that effectively fix LIBOR for $50.0 million of this loan through January 2022. Accordingly, the equivalent fixed rate of this amount is 2.79%. The interest rate on the remaining $150.0 million was 1.25% at December 31, 2020.
Schedule of Long-term Debt Instruments
The following table sets forth scheduled future principal payments, including amortization, due on our mortgages and notes payable at December 31, 2020:
Years Ending December 31,Principal Amount
2021$150,504 
2022200,686 
2023251,024 
20241,124 
2025 (1)
(185)
Thereafter1,880,849 
Less-unamortized debt issuance costs(13,981)
$2,470,021 
__________
(1)Represents amortization of discounts in excess of principal payments due.
v3.20.4
Derivative Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Instruments, Fair Value
The following table sets forth the fair value of our derivatives:
December 31,
20202019
Derivatives:
Derivatives designated as cash flow hedges in accounts payable, accrued expenses and other liabilities:
Interest rate swaps$846 $154 
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance
The following table sets forth the effect of our cash flow hedges on accumulated other comprehensive income/(loss) and interest expense:
Year Ended December 31,
202020192018
Derivatives Designated as Cash Flow Hedges:
Amount of unrealized gains/(losses) recognized in accumulated other comprehensive income/(loss) on derivatives:
Interest rate swaps$(1,238)$(9,134)$4,161 
Amount of (gains)/losses reclassified out of accumulated other comprehensive income/(loss) into interest expense:
Interest rate swaps$247 $(1,250)$(2,086)
v3.20.4
Noncontrolling Interests (Tables) - Highwoods Properties, Inc. [Member]
12 Months Ended
Dec. 31, 2020
Noncontrolling Interest [Line Items]  
Noncontrolling Interests in the Operating Partnership
The following table sets forth the Company’s noncontrolling interests in the Operating Partnership:

Year Ended December 31,
20202019
Beginning noncontrolling interests in the Operating Partnership$133,216 $105,960 
Adjustment of noncontrolling interests in the Operating Partnership to fair value(30,617)29,557 
Issuances of Common Units6,163 — 
Conversions of Common Units to Common Stock(145)(663)
Net income attributable to noncontrolling interests in the Operating Partnership9,338 3,551 
Distributions to noncontrolling interests in the Operating Partnership(5,456)(5,189)
Total noncontrolling interests in the Operating Partnership$112,499 $133,216 
Net Income Available for Common Stockholders and Transfers From Noncontrolling Interests in the Operating Partnership
The following table sets forth net income available for common stockholders and transfers from the Company’s noncontrolling interests in the Operating Partnership:
Year Ended December 31,
202020192018
Net income available for common stockholders$344,914 $134,430 $169,343 
Increase in additional paid in capital from conversions of Common Units to Common Stock
145 663 4,043 
Issuances of Common Units
(6,163)— — 
Change from net income available for common stockholders and transfers from noncontrolling interests$338,896 $135,093 $173,386 
v3.20.4
Disclosure About Fair Value of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2020
Fair Value Disclosures [Abstract]  
Fair Value Measurements of Assets, Liabilities and Noncontrolling Interests
The following table sets forth our assets and liabilities and the Company’s noncontrolling interests in the Operating Partnership that are measured or disclosed at fair value within the fair value hierarchy:

Level 1Level 2
TotalQuoted Prices
in Active
Markets for Identical Assets or Liabilities
Significant Observable Inputs
Fair Value at December 31, 2020:
Assets:
Mortgages and notes receivable, at fair value (1)
$1,341 $— $1,341 
Marketable securities of non-qualified deferred compensation plan (in prepaid expenses and other assets)
2,573 2,573 — 
Total Assets$3,914 $2,573 $1,341 
Noncontrolling Interests in the Operating Partnership$112,499 $112,499 $— 
Liabilities:
Mortgages and notes payable, net, at fair value (1)
$2,639,163 $— $2,639,163 
Interest rate swaps (in accounts payable, accrued expenses and other liabilities)
846 — 846 
Non-qualified deferred compensation obligation (in accounts payable, accrued expenses and other liabilities)
2,573 2,573 — 
Total Liabilities$2,642,582 $2,573 $2,640,009 
Fair Value at December 31, 2019:
Assets:
Mortgages and notes receivable, at fair value (1)
$1,501 $— $1,501 
Marketable securities of non-qualified deferred compensation plan (in prepaid expenses and other assets)
2,345 2,345 — 
Total Assets$3,846 $2,345 $1,501 
Noncontrolling Interests in the Operating Partnership$133,216 $133,216 $— 
Liabilities:
Mortgages and notes payable, net, at fair value (1)
$2,615,776 $— $2,615,776 
Interest rate swaps (in accounts payable, accrued expenses and other liabilities)
154 — 154 
Non-qualified deferred compensation obligation (in accounts payable, accrued expenses and other liabilities)
2,345 2,345 — 
Total Liabilities$2,618,275 $2,345 $2,615,930 
__________
(1)    Amounts are not recorded at fair value on our Consolidated Balance Sheets at December 31, 2020 and 2019.
v3.20.4
Equity (Tables)
12 Months Ended
Dec. 31, 2020
Class of Stock [Line Items]  
Schedule of Stock by Class, Preferred Stock
The following table sets forth the Company’s Preferred Stock:

Issue DateNumber of Shares OutstandingCarrying ValueLiquidation Preference Per ShareOptional Redemption DateAnnual Dividends Payable Per Share
(in thousands)
December 31, 2020
8.625% Series A Cumulative Redeemable2/12/199729 $28,826 $1,000 2/12/2027$86.25 
December 31, 2019
8.625% Series A Cumulative Redeemable2/12/199729 $28,859 $1,000 2/12/2027$86.25 
Common Stock [Member]  
Class of Stock [Line Items]  
Schedule Of Components Of Taxability Of Company Dividends [Table Text Block]
The following table sets forth the Company’s estimated taxability to the common stockholders of dividends per share for federal income tax purposes:

Year Ended December 31,
202020192018
Ordinary dividend$1.65 $1.64 $1.48 
Capital gains0.25 0.13 0.31 
Return of capital0.02 0.13 0.06 
Total$1.92 $1.90 $1.85 
Preferred Stock [Member]  
Class of Stock [Line Items]  
Schedule Of Components Of Taxability Of Company Dividends [Table Text Block]
The following table sets forth the Company’s estimated taxability to the preferred stockholders of dividends per share for federal income tax purposes:

Year Ended December 31,
202020192018
8.625% Series A Cumulative Redeemable:
Ordinary dividend$74.96 $79.90 $71.22 
Capital gains11.29 6.35 15.03 
Total$86.25 $86.25 $86.25 
Highwoods Realty Limited Partnership [Member]  
Class of Stock [Line Items]  
Schedule of Stock by Class, Preferred Stock
The following table sets forth the Operating Partnership’s Preferred Units:
Issue DateNumber of
Units
Outstanding
Carrying
Value
Liquidation Preference
Per Unit
Optional Redemption
Date
Annual
Distributions
Payable
Per Unit
(in thousands)
December 31, 2020
8.625% Series A Cumulative Redeemable2/12/199729 $28,826 $1,000 2/12/2027$86.25 
December 31, 2019
8.625% Series A Cumulative Redeemable2/12/199729 $28,859 $1,000 2/12/2027$86.25 
v3.20.4
Employee Benefit Plans (Tables)
12 Months Ended
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Compensation, Shares Reserved for Future Issuance The following table sets forth the number of shares of Common Stock reserved for future issuance under the Company’s long-term equity incentive plans:
December 31,
20202019
Outstanding stock options and warrants552,373 599,902 
Possible future issuance under equity incentive plans1,926,324 2,016,659 
2,478,697 2,616,561 
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award
The following table sets forth stock option activity:
Options Outstanding
Number of OptionsWeighted Average Exercise Price
Stock options outstanding at December 31, 2017640,822 $45.29 
Exercised(44,304)40.15 
Stock options outstanding at December 31, 2018596,518 45.67 
Exercised(9,026)39.53 
Forfeited(2,590)48.79 
Stock options outstanding at December 31, 2019584,902 45.75 
Exercised(42,163)41.10 
Forfeited(5,366)50.82 
Stock options outstanding at December 31, 2020 (1) (2)
537,373 $46.07 
__________
(1)The outstanding options at December 31, 2020 had a weighted average remaining life of 5.0 years.
(2)The Company had 496,656 options exercisable at December 31, 2020 with a weighted average exercise price of $45.54, weighted average remaining life of 4.9 years and intrinsic value of $0.1 million. Of these exercisable options, 436,880 had exercise prices higher than the market price of our Common Stock at December 31, 2020.
Schedule of NonQualified Deferred Compensation Liability
The following table sets forth our deferred compensation liability:

Year Ended December 31,
202020192018
Beginning deferred compensation liability$2,345 $1,849 $2,388 
Mark-to-market adjustment to deferred compensation (in general and administrative expenses)
228 496 (182)
Distributions from deferred compensation plans— — (357)
Total deferred compensation liability$2,573 $2,345 $1,849 
Time-Based Restricted Stock [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Compensation, Restricted Stock Units Award Activity
The following table sets forth time-based restricted stock activity:
Number of SharesWeighted Average Grant Date Fair Value
Restricted shares outstanding at December 31, 2017172,246 $46.46 
Awarded and issued (1)
94,984 43.01 
Vested (2)
(73,307)44.19 
Forfeited(2,684)45.89 
Restricted shares outstanding at December 31, 2018191,239 45.62 
Awarded and issued (1)
103,590 45.98 
Vested (2)
(73,036)45.79 
Forfeited(3,642)46.07 
Restricted shares outstanding at December 31, 2019218,151 45.73 
Awarded and issued (1)
83,116 44.88 
Vested (2)
(88,326)45.86 
Forfeited(3,751)45.78 
Restricted shares outstanding at December 31, 2020209,190 $45.34 
__________
(1)The weighted average fair value at grant date of time-based restricted stock issued during the years ended December 31, 2020, 2019 and 2018 was $3.7 million, $4.8 million and $4.1 million, respectively.
(2)The vesting date fair value of time-based restricted stock that vested during the years ended December 31, 2020, 2019 and 2018 was $3.9 million, $3.3 million and $3.2 million, respectively. Vested shares include those shares surrendered by employees to satisfy tax withholding obligations in connection with such vesting.
Total Return-Based Restricted Stock [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions The fair values of the total return-based restricted stock granted were determined at the grant dates using a Monte Carlo simulation model and the following assumptions:
202020192018
Risk free interest rate (1) 
0.9 %2.4 %2.3 %
Common stock dividend yield (2) 
3.9 %4.4 %3.9 %
Expected volatility (3) 
20.4 %27.3 %41.1 %
__________
(1)Represents the interest rate as of the grant date on US treasury bonds having the same life as the estimated life of the total return-based restricted stock grants.
(2)The dividend yield is calculated utilizing the then current regular dividend rate for a one-year period and the average per share price of Common Stock during the three-month period preceding the date of grant.
(3)Based on the historical volatility of Common Stock over a period relevant to the related total return-based restricted stock grant.
Schedule of Share-based Compensation, Restricted Stock Units Award Activity
The following table sets forth total return-based restricted stock activity:
Number of SharesWeighted Average Grant Date Fair Value
Restricted shares outstanding at December 31, 2017160,724 $44.72 
Awarded and issued (1)
77,456 40.81 
Vested (2)
(41,160)45.61 
Forfeited (3)
(16,926)45.24 
Restricted shares outstanding at December 31, 2018180,094 43.34 
Awarded and issued (1)
87,344 39.42 
Vested (2)
(45,901)43.68 
Forfeited (3)
(12,689)43.58 
Restricted shares outstanding at December 31, 2019208,848 42.22 
Awarded and issued (1)
66,188 38.31 
Forfeited (3)
(49,852)51.93 
Restricted shares outstanding at December 31, 2020225,184 $39.53 
__________
(1)The fair value at grant date of total return-based restricted stock issued during the years ended December 31, 2020, 2019 and 2018 was $2.5 million, $3.4 million and $3.2 million, respectively, at target.
(2)The vesting date fair value of total return-based restricted stock that vested during the years ended December 31, 2019 and 2018 was $2.1 million and $1.8 million, respectively, based on the performance of the specific plans. Vested shares include those shares surrendered by employees to satisfy tax withholding obligations in connection with such vesting. There were no vested shares of total return-based restricted stock during the year ended December 31, 2020.
(3)The 2020, 2019 and 2018 amounts include 46,852, 9,521 and 13,707 shares, respectively, that were forfeited at the end of the applicable measurement period because the applicable total return did not meet targeted levels.
v3.20.4
Accumulated Other Comprehensive Income/(Loss) (Tables)
12 Months Ended
Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Components of Accumulated Comprehensive Income/(Loss)
The following table sets forth the components of accumulated other comprehensive income/(loss):
December 31,
20202019
Cash flow hedges:
Beginning balance$(471)$9,913 
Unrealized losses on cash flow hedges(1,238)(9,134)
Amortization of cash flow hedges (1)
247 (1,250)
Total accumulated other comprehensive loss$(1,462)$(471)
__________
(1)    Amounts reclassified out of accumulated other comprehensive income/(loss) into interest expense.
v3.20.4
Real Estate and Other Assets Held For Sale (Tables)
12 Months Ended
Dec. 31, 2020
Discontinued Operations and Disposal Groups [Abstract]  
Real Estate and Other Assets of the Properties Classified As Held For Sale
The following table sets forth the assets held for sale at December 31, 2020 and 2019, which are considered non-core:

December 31,
20202019
Assets:
Land$2,612 $4,815 
Buildings and tenant improvements12,238 29,581 
Less-accumulated depreciation(3,577)(16,775)
Net real estate assets11,273 17,621 
Accrued straight-line rents receivable— 2,073 
Deferred leasing costs, net87 1,096 
Real estate and other assets, net, held for sale$11,360 $20,790 
v3.20.4
Earnings Per Share and Per Unit (Tables)
12 Months Ended
Dec. 31, 2020
Earnings Per Share/Unit Basic and Diluted [Line Items]  
Earnings Per Share
The following table sets forth the computation of basic and diluted earnings per share of the Company:

Year Ended December 31,
202020192018
Earnings per Common Share - basic:
Numerator:
Net income$357,914 $141,683 $177,630 
Net (income) attributable to noncontrolling interests in the Operating Partnership(9,338)(3,551)(4,588)
Net (income) attributable to noncontrolling interests in consolidated affiliates(1,174)(1,214)(1,207)
Dividends on Preferred Stock(2,488)(2,488)(2,492)
Net income available for common stockholders$344,914 $134,430 $169,343 
Denominator:
Denominator for basic earnings per Common Share – weighted average shares (1)
103,876 103,692 103,439 
Net income available for common stockholders$3.32 $1.30 $1.64 
Earnings per Common Share - diluted:
Numerator:
Net income$357,914 $141,683 $177,630 
Net (income) attributable to noncontrolling interests in consolidated affiliates(1,174)(1,214)(1,207)
Dividends on Preferred Stock(2,488)(2,488)(2,492)
Net income available for common stockholders before net (income) attributable to noncontrolling interests in the Operating Partnership$354,252 $137,981 $173,931 
Denominator:
Denominator for basic earnings per Common Share – weighted average shares (1)
103,876 103,692 103,439 
Add:
Stock options using the treasury method22 33 
Noncontrolling interests Common Units2,830 2,731 2,796 
Denominator for diluted earnings per Common Share – adjusted weighted average shares and assumed conversions106,714 106,445 106,268 
Net income available for common stockholders$3.32 $1.30 $1.64 
__________
(1)Includes all unvested restricted stock where dividends on such restricted stock are non-forfeitable.
Highwoods Realty Limited Partnership [Member]  
Earnings Per Share/Unit Basic and Diluted [Line Items]  
Earnings Per Unit
The following table sets forth the computation of basic and diluted earnings per unit of the Operating Partnership:

Year Ended December 31,
202020192018
Earnings per Common Unit - basic:
Numerator:
Net income$357,914 $141,683 $177,630 
Net (income) attributable to noncontrolling interests in consolidated affiliates(1,174)(1,214)(1,207)
Distributions on Preferred Units(2,488)(2,488)(2,492)
Net income available for common unitholders$354,252 $137,981 $173,931 
Denominator:
Denominator for basic earnings per Common Unit – weighted average units (1)
106,297 106,014 105,826 
Net income available for common unitholders$3.33 $1.30 $1.64 
Earnings per Common Unit - diluted:
Numerator:
Net income$357,914 $141,683 $177,630 
Net (income) attributable to noncontrolling interests in consolidated affiliates(1,174)(1,214)(1,207)
Distributions on Preferred Units(2,488)(2,488)(2,492)
Net income available for common unitholders$354,252 $137,981 $173,931 
Denominator:
Denominator for basic earnings per Common Unit – weighted average units (1)
106,297 106,014 105,826 
Add:
Stock options using the treasury method22 33 
Denominator for diluted earnings per Common Unit – adjusted weighted average units and assumed conversions106,305 106,036 105,859 
Net income available for common unitholders$3.33 $1.30 $1.64 
__________
(1)Includes all unvested restricted stock where distributions on such restricted stock are non-forfeitable.
v3.20.4
Income Taxes (Tables)
12 Months Ended
Dec. 31, 2020
Income Tax Disclosure [Abstract]  
Schedule of Income Tax Expense/(Benefit)
The following table sets forth the Company’s income tax expense:

Year Ended December 31,
202020192018
Current tax expense:
Federal$110 $202 $133 
State240 148 112 
350 350 245 
Deferred tax expense/(benefit):
Federal(9)14 (95)
State(4)(120)(68)
(13)(106)(163)
Total income tax expense$337 $244 $82 
v3.20.4
Segment Information (Tables)
12 Months Ended
Dec. 31, 2020
Segment Reporting [Abstract]  
Segment Information
The following tables summarize the rental and other revenues and net operating income, the primary industry property-level performance metric used by our chief operating decision maker and which is defined as rental and other revenues less rental property and other expenses, for each of our reportable segments. Our segment information as of December 31, 2019 and for the years ended December 31, 2019 and 2018 have been retrospectively revised from previously reported amounts to reflect a change in our reportable segments as a result of recent dispositions.
Year Ended December 31,
202020192018
Rental and Other Revenues:
Office:
Atlanta$146,704 $151,279 $141,337 
Charlotte35,733 4,650 — 
Nashville138,089 133,867 121,836 
Orlando49,459 52,679 53,771 
Pittsburgh58,518 60,755 61,177 
Raleigh128,189 122,173 118,352 
Richmond48,079 49,428 45,729 
Tampa99,520 86,431 102,404 
Total Office Segment704,291 661,262 644,606 
Other32,609 74,717 75,429 
Total Rental and Other Revenues$736,900 $735,979 $720,035 
Net Operating Income:
Office:
Atlanta$95,448 $97,019 $87,503 
Charlotte28,431 3,791 — 
Nashville99,901 97,386 88,554 
Orlando29,546 32,062 32,841 
Pittsburgh35,631 36,249 36,233 
Raleigh95,926 88,402 86,053 
Richmond33,667 33,756 31,276 
Tampa67,059 50,339 65,819 
Total Office Segment485,609 439,004 428,279 
Other 19,466 48,464 49,341 
Total Net Operating Income505,075 487,468 477,620 
Reconciliation to net income:
Depreciation and amortization(241,585)(254,504)(229,955)
Impairments of real estate assets(1,778)(5,849)(423)
General and administrative expenses(41,031)(44,067)(40,006)
Interest expense(80,962)(81,648)(71,422)
Other income/(loss)(1,707)(2,510)1,940 
Gains on disposition of property215,897 39,517 37,638 
Equity in earnings of unconsolidated affiliates4,005 3,276 2,238 
Net income$357,914 $141,683 $177,630 
December 31,
20202019
Total Assets:
Office:
Atlanta$1,011,807 $1,040,869 
Charlotte443,051 425,045 
Nashville1,191,219 1,045,125 
Orlando289,129 289,743 
Pittsburgh313,783 323,792 
Raleigh839,831 830,128 
Richmond240,976 246,546 
Tampa556,951 521,620 
Total Office Segment4,886,747 4,722,868 
Other322,670 415,376 
Total Assets$5,209,417 $5,138,244 
v3.20.4
Quarterly Financial Data (Unaudited) (Tables)
12 Months Ended
Dec. 31, 2020
Quarterly Financial Data [Line Items]  
Schedule of Quarterly Financial Data
The following tables set forth quarterly financial information of the Company:
Year Ended December 31, 2020
First
Quarter
Second
Quarter
Third
Quarter
Fourth
Quarter
Total
Rental and other revenues$192,800 $183,153 $181,043 $179,904 $736,900 
Net income191,340 38,956 42,331 85,287 357,914 
Net (income) attributable to noncontrolling interests in the Operating Partnership
(4,960)(1,017)(1,107)(2,254)(9,338)
Net (income) attributable to noncontrolling interests in consolidated affiliates
(285)(289)(298)(302)(1,174)
Dividends on Preferred Stock(622)(622)(622)(622)(2,488)
Net income available for common stockholders$185,473 $37,028 $40,304 $82,109 $344,914 
Earnings per Common Share – basic:
Net income available for common stockholders$1.79 $0.36 $0.39 $0.79 $3.32 
Earnings per Common Share – diluted:
Net income available for common stockholders$1.79 $0.36 $0.39 $0.79 $3.32 

Year Ended December 31, 2019
First
Quarter
Second
Quarter
Third
Quarter
Fourth
Quarter
Total
Rental and other revenues$172,363 $184,070 $187,475 $192,071 $735,979 
Net income8,386 41,394 29,557 62,346 141,683 
Net (income) attributable to noncontrolling interests in the Operating Partnership
(193)(1,044)(737)(1,577)(3,551)
Net (income) attributable to noncontrolling interests in consolidated affiliates
(316)(306)(297)(295)(1,214)
Dividends on Preferred Stock(622)(622)(622)(622)(2,488)
Net income available for common stockholders$7,255 $39,422 $27,901 $59,852 $134,430 
Earnings per Common Share – basic:
Net income available for common stockholders$0.07 $0.38 $0.27 $0.58 $1.30 
Earnings per Common Share – diluted:
Net income available for common stockholders$0.07 $0.38 $0.27 $0.58 $1.30 
Highwoods Realty Limited Partnership [Member]  
Quarterly Financial Data [Line Items]  
Schedule of Quarterly Financial Data
The following tables set forth quarterly financial information of the Operating Partnership:

Year Ended December 31, 2020
First
Quarter
Second
Quarter
Third
Quarter
Fourth
Quarter
Total
Rental and other revenues$192,800 $183,153 $181,043 $179,904 $736,900 
Net income191,340 38,956 42,331 85,287 357,914 
Net (income) attributable to noncontrolling interests in consolidated affiliates
(285)(289)(298)(302)(1,174)
Distributions on Preferred Units(622)(622)(622)(622)(2,488)
Net income available for common unitholders$190,433 $38,045 $41,411 $84,363 $354,252 
Earnings per Common Unit – basic:
Net income available for common unitholders$1.79 $0.36 $0.39 $0.79 $3.33 
Earnings per Common Unit – diluted:
Net income available for common unitholders$1.79 $0.36 $0.39 $0.79 $3.33 

Year Ended December 31, 2019
First
Quarter
Second
Quarter
Third
Quarter
Fourth
Quarter
Total
Rental and other revenues$172,363 $184,070 $187,475 $192,071 $735,979 
Net income8,386 41,394 29,557 62,346 141,683 
Net (income) attributable to noncontrolling interests in consolidated affiliates
(316)(306)(297)(295)(1,214)
Distributions on Preferred Units(622)(622)(622)(622)(2,488)
Net income available for common unitholders$7,448 $40,466 $28,638 $61,429 $137,981 
Earnings per Common Unit – basic:
Net income available for common unitholders$0.07 $0.38 $0.27 $0.58 $1.30 
Earnings per Common Unit – diluted:
Net income available for common unitholders$0.07 $0.38 $0.27 $0.58 $1.30 
v3.20.4
Description of Business and Significant Accounting Policies (Details)
$ in Thousands, ft² in Millions
12 Months Ended
Dec. 31, 2020
USD ($)
ft²
a
customers
propertyUnit
shares
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Description of Business [Abstract]      
Rentable square feet of commercial real estate (in square feet) | ft² 27.2    
Rentable square feet of commercial real estate under development (in square feet) | ft² 1.2    
Undeveloped land suitable for future development (in acres) | a 230    
Number of common units required to convert to one share of common stock (in shares) 1    
Number of trading days preceeding Redemption Notice Date (in days) 10 days    
Consolidated in-service office properties not wholly owned (in units) | propertyUnit 3    
Percentage acquired in VIE (in hundredths) 100.00%    
Self insurance liability | $ $ 500    
Real estate assets, depreciation expense | $ $ 204,585 $ 214,682 $ 191,035
Maturity of highly liquid investments (in months) 3 months    
Percent of annual REIT taxable income required to pay to the Company's stockholders 90.00%    
Customers with leases on wholly owned properties | customers 1,378    
Percent of annualized cash rental revenue derived from geographic locations 10.00%    
Limit of consolidated revenue generated by any single customer 5.00%    
Deferred rents included in accounts receivable | $ $ 3,700    
Minimum [Member]      
Description of Business [Abstract]      
Adjustment interval of variable debt interest rates, mimimum (in months) 1 month    
Maximum [Member]      
Description of Business [Abstract]      
Adjustment interval of variable debt interest rates, mimimum (in months) 3 months    
Building [Member]      
Description of Business [Abstract]      
Property, plant and equipment useful life 40 years    
Building Improvements [Member]      
Description of Business [Abstract]      
Property, plant and equipment useful life 15 years    
Furniture and Fixtures [Member] | Minimum [Member]      
Description of Business [Abstract]      
Property, plant and equipment useful life 5 years    
Furniture and Fixtures [Member] | Maximum [Member]      
Description of Business [Abstract]      
Property, plant and equipment useful life 7 years    
Leaseholds and Leasehold Improvements [Member] | Minimum [Member]      
Description of Business [Abstract]      
Property, plant and equipment useful life 3 years    
Leaseholds and Leasehold Improvements [Member] | Maximum [Member]      
Description of Business [Abstract]      
Property, plant and equipment useful life 10 years    
Highwoods Properties, Inc. [Member]      
Description of Business [Abstract]      
Common Units of partnership owned (in shares) 103,500,000    
Percentage of ownership of Common Units 97.30%    
Common units redeemed for a like number of common shares of stock (in shares) 3,570    
Highwoods Realty Limited Partnership [Member]      
Description of Business [Abstract]      
Common Units of partnership not owned by the Company (in shares) 2,800,000    
Issuance of Common Units in acquisition (in units) 118,592    
v3.20.4
Leases ASC 842 (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
propertyUnit
Dec. 31, 2019
USD ($)
Lessor Disclosure [Abstract]    
Rental and other revenues related to operating lease payments $ 726,000 $ 723,100
Variable lease payments 56,000 65,400
Operating leases, scheduled future minimum payments receivable [Abstract]    
2021 623,888  
2022 619,530  
2023 570,417  
2024 513,483  
2025 432,272  
Thereafter 2,049,545  
Operating leases, total future minimum payments receivable due $ 4,809,135  
Lessee Disclosure [Abstract]    
Number of properties subject to ground leases | propertyUnit 20  
Weighted average remaining term of ground leases (in years) 51 years  
Operating lease liability upon initial adoption $ 35,300  
Operating Lease, Liability, Statement of Financial Position [Extensible List] us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent  
Right of use asset upon initial adoption $ 29,700  
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] us-gaap:PrepaidExpenseAndOtherAssets  
Operating lease discount rate (in hundredths) 4.50%  
Operating ground lease expense $ 2,600 2,500
Operating ground lease payments 2,200 $ 2,200
Operating ground lease liabilities, scheduled future minimum payments [Abstract]    
2021 2,127  
2022 2,169  
2023 2,167  
2024 2,123  
2025 2,170  
Thereafter 81,527  
Operating ground lease liability, total future minimum payments 92,283  
Operating lease liability discount (57,892)  
Operating lease liability $ 34,391  
Minimum [Member]    
Lessor Disclosure [Abstract]    
Operating leases, term of leases 3 years  
Maximum [Member]    
Lessor Disclosure [Abstract]    
Operating leases, term of leases 10 years  
v3.20.4
Leases ASC 840 (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Allowance For Doubtful Accounts [Roll Forward]  
Allowance for doubtful accounts, beginning balance $ 1,644
Additions to allowance for doubtful accounts 1,568
Deductions to allowance for doubtful accounts (1,361)
Allowance for doubtful accounts, ending balance 1,851
Lessee Disclosure [Abstract]  
Total rental property expense recorded for operating ground leases 2,500
Allowance for Doubtful Accounts - Straight Line Rent [Member]  
Allowance For Doubtful Accounts [Roll Forward]  
Allowance for doubtful accounts, beginning balance 819
Additions to allowance for doubtful accounts 599
Deductions to allowance for doubtful accounts (777)
Allowance for doubtful accounts, ending balance 641
Allowance for Doubtful Accounts - Accounts Receivable [Member]  
Allowance For Doubtful Accounts [Roll Forward]  
Allowance for doubtful accounts, beginning balance 753
Additions to allowance for doubtful accounts 969
Deductions to allowance for doubtful accounts (556)
Allowance for doubtful accounts, ending balance 1,166
Allowance for Doubtful Accounts - Notes Receivable [Member]  
Allowance For Doubtful Accounts [Roll Forward]  
Allowance for doubtful accounts, beginning balance 72
Additions to allowance for doubtful accounts 0
Deductions to allowance for doubtful accounts (28)
Allowance for doubtful accounts, ending balance $ 44
v3.20.4
Real Estate Assets (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
a
ft²
propertyUnit
parcel
shares
Dec. 31, 2019
USD ($)
ft²
a
propertyUnit
parcel
Dec. 31, 2018
USD ($)
a
propertyUnit
parcel
Acquisitions [Abstract]      
Rentable square feet of commercial real estate (in square feet) | ft² 27,200,000    
Undeveloped land suitable for future development (in acres) | a 230    
Dispositions [Abstract]      
Gains on disposition of property $ 215,897 $ 39,517 $ 37,638
Impairments [Abstract]      
Impairments of real estate assets $ 1,778 $ 5,849 $ 423
2020 Land Acquisitions [Member]      
Acquisitions [Abstract]      
Number of development parcels acquired (in parcels) | parcel 2    
Undeveloped land suitable for future development (in acres) | a 1    
Purchase price of acquisition $ 8,500    
Issuance of Common Units in acquisition (in units) | shares 118,592    
Submarket Acquisition [Member]      
Acquisitions [Abstract]      
Rentable square feet of commercial real estate (in square feet) | ft²   841,000  
Purchase price of acquisition   $ 399,100  
2019 Land Acquisitions [Member]      
Acquisitions [Abstract]      
Number of development parcels acquired (in parcels) | parcel   4  
Undeveloped land suitable for future development (in acres) | a   10  
Purchase price of acquisition   $ 12,400  
Nashville TN Land Acquisition (03/2018) [Member]      
Acquisitions [Abstract]      
Number of development parcels acquired (in parcels) | parcel     2
Undeveloped land suitable for future development (in acres) | a     9
Purchase price of acquisition     $ 50,600
2020 Dispositions [Member]      
Acquisitions [Abstract]      
Rentable square feet of commercial real estate (in square feet) | ft² 4,489,000    
Dispositions [Abstract]      
Number of buildings sold | propertyUnit 52    
Sale price of disposition $ 494,200    
Closing credits excluded for unfunded building and/or tenant improvements 5,700    
Gains on disposition of property 215,500    
2019 Dispositions [Member]      
Dispositions [Abstract]      
Number of buildings sold | propertyUnit   6  
Sale price of disposition   $ 136,400  
Gains on disposition of property   39,500  
2018 Dispositions [Member]      
Dispositions [Abstract]      
Number of buildings sold | propertyUnit     3
Sale price of disposition     $ 90,600
Gains on disposition of property     37,600
2016 Land Disposition [Member]      
Dispositions [Abstract]      
Gains on disposition of property 400    
2020 Impairments [Member]      
Impairments [Abstract]      
Impairments of real estate assets $ 1,800    
2019 Impairments [Member]      
Impairments [Abstract]      
Impairments of real estate assets   $ 5,800  
2018 Impairments [Member]      
Impairments [Abstract]      
Impairments of real estate assets     $ 400
v3.20.4
Investments In and Advances To Affiliates (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]      
Percentage of equity interest in joint ventures, maximum 50.00%    
Difference between cost of investments and the net book value of underlying net assets $ 0.6 $ 0.7  
Development, management and leasing fees recognized from unconsolidated affiliates 1.0 0.5 $ 0.4
Receivables from management and leasing fees $ 0.2 $ 0.1  
Plaza Colonnade, Tenant-in-Common [Member]      
Schedule of Equity Method Investments [Line Items]      
Percentage of equity interest in joint ventures, maximum 50.00%    
Kessinger/Hunter & Company, LC [Member]      
Schedule of Equity Method Investments [Line Items]      
Percentage of equity interest in joint ventures, maximum 26.50%    
Highwoods DLF Forum, LLC Joint Venture [Member]      
Schedule of Equity Method Investments [Line Items]      
Percentage of equity interest in joint ventures, maximum 25.00%    
Percentage of partner's interest in asset acquired (in hundredths) 75.00%    
Highwoods-Markel Associates, LLC Joint Venture [Member]      
Consolidated Affiliates:      
Percentage of equity interest in consolidated affiliates 50.00%    
Fair value of noncontrolling interests in consolidated affiliate $ 30.7    
v3.20.4
Investments In and Advances To Affiliates Consolidated Variable Interest Entity (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
ft²
Dec. 31, 2020
USD ($)
ft²
Dec. 31, 2018
USD ($)
Consolidated Variable Interest Entity [Abstract]      
Rentable square feet of office property under development (in sq feet) | ft²   1,200,000  
Assets and liabilities of consolidated variable interest entity [Abstract]      
Development in-process $ 172,706 $ 259,681 $ 165,537
Deferred leasing costs 231,347 209,329  
Prepaid expenses and other assets 58,996 62,885  
Accounts payable, accrued expenses and other liabilities $ 286,911 $ 268,727  
Ownership Percentage [Member]      
Consolidated Variable Interest Entity [Abstract]      
Partner's interest in consolidated joint venture (in hundredths)   50.00%  
Consolidated Variable Interest Entity [Member]      
Consolidated Variable Interest Entity [Abstract]      
Rentable square feet of office property under development (in sq feet) | ft² 150,000    
Total anticipated development costs $ 71,300    
Contribution of cash to acquire interest in consolidated joint venture $ 20,000    
Percentage of equity interest in consolidated affiliates 80.00%    
Partner's contribution of property to acquire interest in consolidated joint venture $ 5,000    
Advance to consolidated affiliate $ 46,300    
Interest rate, basis spread (in hundredths) 2.50%    
Amount of loan funded to affiliate   $ 18,500  
Assets and liabilities of consolidated variable interest entity [Abstract]      
Development in-process   46,873  
Deferred leasing costs   196  
Prepaid expenses and other assets   75  
Accounts payable, accrued expenses and other liabilities   $ 2,693  
Consolidated Variable Interest Entity [Member] | Ownership Percentage [Member]      
Consolidated Variable Interest Entity [Abstract]      
Partner's interest in consolidated joint venture (in hundredths) 20.00% 20.00%  
London Interbank Offered Rate (LIBOR) [Member] | Consolidated Variable Interest Entity [Member]      
Consolidated Variable Interest Entity [Abstract]      
Interest rate basis LIBOR    
v3.20.4
Intangible Assets and Below Market Lease Liabilities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Intangible assets and below market lease liabilities, net [Abstract]      
Deferred leasing costs, gross $ 361,027 $ 377,472  
Deferred leasing costs, accumulated amortization (151,698) (146,125)  
Deferred leasing costs, net/Total scheduled future amortization of intangible assets 209,329 231,347  
Acquisition-related below market lease liabilities, gross 63,748 65,971  
Acquisition-related below market lease liabilities, accumulated amortization (37,838) (34,014)  
Acquisition-related below market lease liabilities, net 25,910 31,957  
Deferred Leasing Costs and Acquisition-Related Intangible Assets [Member]      
Intangible assets and below market lease liabilities, net [Abstract]      
Deferred leasing costs, net/Total scheduled future amortization of intangible assets 194,121    
Amortization of intangible assets and below market lease liabilities      
Amortization of intangible assets 34,401 37,386 $ 36,486
Lease Incentives [Member]      
Intangible assets and below market lease liabilities, net [Abstract]      
Deferred leasing costs, net/Total scheduled future amortization of intangible assets 10,915    
Amortization of intangible assets and below market lease liabilities      
Amortization of intangible assets 1,847 4,281 1,908
Acquisition-Related Intangible Assets (in Rental and Other Revenue) [Member]      
Intangible assets and below market lease liabilities, net [Abstract]      
Deferred leasing costs, net/Total scheduled future amortization of intangible assets 4,293    
Amortization of intangible assets and below market lease liabilities      
Amortization of intangible assets 1,137 1,290 1,677
Acquisition-Related Intangible Assets (in Rental Property and Other Expenses) [Member]      
Amortization of intangible assets and below market lease liabilities      
Amortization of intangible assets 510 557 557
Acquisition-Related Below Market Lease Liabilities [Member]      
Intangible assets and below market lease liabilities, net [Abstract]      
Acquisition-related below market lease liabilities, net 25,910    
Amortization of intangible assets and below market lease liabilities      
Amortization of acquisition-related below market lease liabilities $ (6,031) $ (6,633) $ (6,085)
v3.20.4
Intangible Assets and Below Market Lease Liabilities - Scheduled Future Amortization (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Scheduled future amortization of intangible assets [Abstract]    
Deferred leasing costs, net/Total scheduled future amortization of intangible assets $ 209,329 $ 231,347
Scheduled future amortization of below market lease liabilites [Abstract]    
Total scheduled future amortization of below market lease liabilities (25,910) $ (31,957)
Deferred Leasing Costs and Acquisition-Related Intangible Assets [Member]    
Scheduled future amortization of intangible assets [Abstract]    
2021 34,063  
2022 30,011  
2023 26,496  
2024 23,348  
2025 19,224  
Thereafter 60,979  
Deferred leasing costs, net/Total scheduled future amortization of intangible assets $ 194,121  
Weighted average remaining amortization periods for intangible assets and liabilities [Abstract]    
Intangible assets, weighted average useful life (in years) 8 years 3 months 18 days  
Lease Incentives [Member]    
Scheduled future amortization of intangible assets [Abstract]    
2021 $ 1,563  
2022 1,353  
2023 1,279  
2024 1,133  
2025 1,064  
Thereafter 4,523  
Deferred leasing costs, net/Total scheduled future amortization of intangible assets $ 10,915  
Weighted average remaining amortization periods for intangible assets and liabilities [Abstract]    
Intangible assets, weighted average useful life (in years) 9 years 6 months  
Acquisition-Related Intangible Assets (in Rental and Other Revenue) [Member]    
Scheduled future amortization of intangible assets [Abstract]    
2021 $ 711  
2022 601  
2023 447  
2024 373  
2025 342  
Thereafter 1,819  
Deferred leasing costs, net/Total scheduled future amortization of intangible assets $ 4,293  
Weighted average remaining amortization periods for intangible assets and liabilities [Abstract]    
Intangible assets, weighted average useful life (in years) 9 years 8 months 12 days  
Acquisition-Related Below Market Lease Liabilities [Member]    
Scheduled future amortization of below market lease liabilites [Abstract]    
2021 $ (4,958)  
2022 (3,977)  
2023 (3,600)  
2024 (2,932)  
2025 (1,673)  
Thereafter (8,770)  
Total scheduled future amortization of below market lease liabilities $ (25,910)  
Weighted average remaining amortization periods for intangible assets and liabilities [Abstract]    
Below market lease liabilities, weighted average useful life (in years) 8 years 7 months 6 days  
v3.20.4
Mortgages and Notes Payable (Details)
12 Months Ended
Dec. 31, 2020
USD ($)
extension
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Jan. 29, 2021
USD ($)
Debt Instrument [Line Items]        
Mortgages and notes payable, net $ 2,470,021,000 $ 2,543,710,000    
Less-unamortized debt issuance costs (13,981,000) (13,018,000)    
Scheduled future principal payments [Abstract]        
2021 150,504,000      
2022 200,686,000      
2023 251,024,000      
2024 1,124,000      
2025 (185,000)      
Thereafter 1,880,849,000      
Less-unamortized debt issuance costs (13,981,000) (13,018,000)    
Mortgages and notes payable, net 2,470,021,000 2,543,710,000    
Gains/(losses) on debt extinguishment $ (3,674,000) (640,000) $ 0  
Lender covenant compliance to accelerate outstanding borrowings 51.00%      
Cross-default minimum threshold $ 30,000,000.0      
Holders covenant compliance of bonds 25.00%      
Uncured covenant compliance default period 60 days      
Maximum liquidity requirements 1 year      
Capitalized Interest [Abstract]        
Capitalized Interest $ 8,300,000 $ 5,600,000 $ 6,700,000  
3.20% (3.363% effective rate) Notes due 2021 [Member]        
Scheduled future principal payments [Abstract]        
Early repayment of debt 150,000,000.0      
Principal amount of debt $ 150,000,000.0      
Stated interest rate (in hundredths) 3.20%      
Purchase price of debt (in hundredths) 101.908%      
4.125% (4.271% effective rate) Notes due 2028 [Member]        
Debt Instrument [Line Items]        
Current interest rate (in hundredths)     4.271%  
Scheduled future principal payments [Abstract]        
Principal amount of debt     $ 350,000,000.0  
Original issuance discount     $ 4,100,000  
Stated interest rate (in hundredths)     4.125%  
Debt issuance costs     $ 2,900,000  
4.20% (4.234% effective rate) Notes due 2029 [Member]        
Debt Instrument [Line Items]        
Current interest rate (in hundredths)   4.234%    
Scheduled future principal payments [Abstract]        
Principal amount of debt   $ 350,000,000.0    
Original issuance discount   $ 1,000,000.0    
Stated interest rate (in hundredths)   4.20%    
Debt issuance costs   $ 3,100,000    
3.050% (3.079% effective rate) Notes due 2030 [Member]        
Debt Instrument [Line Items]        
Current interest rate (in hundredths)   3.079%    
Scheduled future principal payments [Abstract]        
Principal amount of debt   $ 400,000,000.0    
Original issuance discount   $ 1,000,000.0    
Stated interest rate (in hundredths)   3.05%    
Debt issuance costs   $ 3,400,000    
2.600% (2.645% effective rate) Notes due 2031 [Member]        
Debt Instrument [Line Items]        
Current interest rate (in hundredths) 2.645%      
Scheduled future principal payments [Abstract]        
Principal amount of debt $ 400,000,000.0      
Original issuance discount $ 1,600,000      
Stated interest rate (in hundredths) 2.60%      
Debt issuance costs $ 3,400,000      
Variable Rate Term Loan due 2022 [Member]        
Scheduled future principal payments [Abstract]        
Early repayment of debt $ 100,000,000.0 100,000,000.0    
Principal amount of debt   200,000,000.0    
Interest rate, basis spread (in hundredths) 1.10%      
Gains/(losses) on debt extinguishment   (300,000)    
Variable Rate Term Loan due 2022 [Member] | London Interbank Offered Rate (LIBOR) [Member]        
Scheduled future principal payments [Abstract]        
Interest rate basis LIBOR      
Revolving Credit Facility due 2022 [Member]        
Scheduled future principal payments [Abstract]        
Maximum borrowing capacity on revolving credit facility $ 600,000,000.0      
Additional borrowing capacity on revolving credit facility $ 400,000,000.0      
Number of additional maturity extensions | extension 2      
Term of optional extensions 6 months      
Annual facility fee (in hundredths) 0.20%      
Amount outstanding on revolving credit facility $ 0      
Outstanding letters of credit on revolving credit facility 100,000      
Unused borrowing capacity on revolving credit facility $ 599,900,000      
Interest rate, basis spread (in hundredths) 1.00%      
Revolving Credit Facility due 2022 [Member] | London Interbank Offered Rate (LIBOR) [Member]        
Scheduled future principal payments [Abstract]        
Interest rate LIBOR      
Variable Rate Term Loan due 2020 [Member]        
Scheduled future principal payments [Abstract]        
Early repayment of debt   $ 225,000,000.0    
Term of debt instrument (in years)   7 years    
Interest rate, basis spread (in hundredths)   1.10%    
Gains/(losses) on debt extinguishment   $ (400,000)    
Variable Rate Term Loan due 2020 [Member] | London Interbank Offered Rate (LIBOR) [Member]        
Scheduled future principal payments [Abstract]        
Interest rate basis   LIBOR    
7.50% Notes due 2018 [Member]        
Debt Instrument [Line Items]        
Current interest rate (in hundredths)     7.50%  
Scheduled future principal payments [Abstract]        
Principal amount of debt     $ 200,000,000.0  
Secured indebtedness [Member]        
Debt Instrument [Line Items]        
Mortgages and notes payable, net $ 93,350,000 $ 95,303,000    
Aggregate undepreciated book value of secured real estate assets 147,900,000      
Annual repayments through principal amortization 2,000,000.0      
Scheduled future principal payments [Abstract]        
Mortgages and notes payable, net 93,350,000 95,303,000    
Secured indebtedness [Member] | 4.0% Mortgage Loan Due 2029 [Member]        
Debt Instrument [Line Items]        
Mortgages and notes payable, net 93,350,000 95,303,000    
Scheduled future principal payments [Abstract]        
Mortgages and notes payable, net 93,350,000 95,303,000    
Unsecured indebtedness [Member]        
Debt Instrument [Line Items]        
Mortgages and notes payable, net 2,390,652,000 2,461,425,000    
Scheduled future principal payments [Abstract]        
Mortgages and notes payable, net 2,390,652,000 2,461,425,000    
Unsecured indebtedness [Member] | 3.20% (3.363% effective rate) Notes due 2021 [Member]        
Debt Instrument [Line Items]        
Mortgages and notes payable, net 149,901,000 299,369,000    
Unamortized discount 100,000 600,000    
Scheduled future principal payments [Abstract]        
Mortgages and notes payable, net 149,901,000 299,369,000    
Unsecured indebtedness [Member] | 3.625% (3.752% effective rate) Notes due 2023 [Member]        
Debt Instrument [Line Items]        
Mortgages and notes payable, net 249,464,000 249,201,000    
Unamortized discount 500,000 800,000    
Scheduled future principal payments [Abstract]        
Mortgages and notes payable, net 249,464,000 249,201,000    
Unsecured indebtedness [Member] | 3.875% (4.038% effective rate) Notes due 2027 [Member]        
Debt Instrument [Line Items]        
Mortgages and notes payable, net 297,534,000 297,134,000    
Unamortized discount 2,500,000 2,900,000    
Scheduled future principal payments [Abstract]        
Mortgages and notes payable, net 297,534,000 297,134,000    
Unsecured indebtedness [Member] | 4.125% (4.271% effective rate) Notes due 2028 [Member]        
Debt Instrument [Line Items]        
Mortgages and notes payable, net 347,035,000 346,621,000    
Unamortized discount 3,000,000.0 3,400,000    
Scheduled future principal payments [Abstract]        
Mortgages and notes payable, net 347,035,000 346,621,000    
Unsecured indebtedness [Member] | 4.20% (4.234% effective rate) Notes due 2029 [Member]        
Debt Instrument [Line Items]        
Mortgages and notes payable, net 349,189,000 349,091,000    
Unamortized discount 800,000 900,000    
Scheduled future principal payments [Abstract]        
Mortgages and notes payable, net 349,189,000 349,091,000    
Unsecured indebtedness [Member] | 3.050% (3.079% effective rate) Notes due 2030 [Member]        
Debt Instrument [Line Items]        
Mortgages and notes payable, net 399,106,000 399,009,000    
Unamortized discount 900,000 1,000,000.0    
Scheduled future principal payments [Abstract]        
Mortgages and notes payable, net 399,106,000 399,009,000    
Unsecured indebtedness [Member] | 2.600% (2.645% effective rate) Notes due 2031 [Member]        
Debt Instrument [Line Items]        
Mortgages and notes payable, net 398,423,000 0    
Unamortized discount 1,600,000      
Scheduled future principal payments [Abstract]        
Mortgages and notes payable, net 398,423,000 0    
Unsecured indebtedness [Member] | Variable Rate Term Loan due 2022 [Member]        
Debt Instrument [Line Items]        
Mortgages and notes payable, net 0 100,000,000    
Scheduled future principal payments [Abstract]        
Mortgages and notes payable, net 0 100,000,000    
Unsecured indebtedness [Member] | Variable Rate Term Loan (2) due 2022 [Member]        
Debt Instrument [Line Items]        
Mortgages and notes payable, net $ 200,000,000 200,000,000    
Interest rate under derivative instruments (in hundredths) 2.79%      
Current interest rate (in hundredths) 1.25%      
Scheduled future principal payments [Abstract]        
Mortgages and notes payable, net $ 200,000,000 200,000,000    
Unsecured indebtedness [Member] | Revolving Credit Facility due 2022 [Member]        
Debt Instrument [Line Items]        
Mortgages and notes payable, net 0 221,000,000    
Scheduled future principal payments [Abstract]        
Mortgages and notes payable, net $ 0 $ 221,000,000    
Subsequent Event [Member] | Revolving Credit Facility due 2022 [Member]        
Scheduled future principal payments [Abstract]        
Amount outstanding on revolving credit facility       $ 0
Outstanding letters of credit on revolving credit facility       100,000
Unused borrowing capacity on revolving credit facility       $ 599,900,000
v3.20.4
Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Derivatives, Fair Value [Line Items]            
Expected increase/(decrease) to interest expense     $ 500      
Derivatives designated as cash flow hedges in accounts payable, accrued expenses and other liabilities [Abstract]            
Interest rate swaps     846 $ 154    
Amount of unrealized gains/(losses) recognized in accumulated other comprehensive income/(loss) on derivatives (effective portion) [Abstract]            
Interest rate swaps/Unrealized gain/(loss) reclassified to interest expense     (1,238) (9,134) $ 4,161  
Amount of (gains)/losses reclassified out of accumulated other comprehensive income/(loss) into interest expense (effective portion) [Abstract]            
Interest rate swaps     $ 247 (1,250) (2,086)  
3.050% (3.079% effective rate) Notes due 2030 [Member]            
Derivatives, Fair Value [Line Items]            
Principal amount of debt       $ 400,000    
Stated interest rate (in hundredths)       3.05%    
4.20% (4.234% effective rate) Notes due 2029 [Member]            
Derivatives, Fair Value [Line Items]            
Principal amount of debt       $ 350,000    
Stated interest rate (in hundredths)       4.20%    
4.125% (4.271% effective rate) Notes due 2028 [Member]            
Derivatives, Fair Value [Line Items]            
Principal amount of debt         $ 350,000  
Stated interest rate (in hundredths)         4.125%  
Forward Starting Swaps [Member]            
Derivatives, Fair Value [Line Items]            
Amount of borrowings outstanding, subject to swaps       $ 150,000 $ 225,000 $ 150,000
Underlying treasury rate term (in years)       10 years 10 years 10 years
Weighted average interest rate under derivative instruments (in hundredths)       1.87% 2.86% 2.44%
Gain on hedge ineffectiveness in interest expense         $ 200  
Amount of unrealized gains/(losses) recognized in accumulated other comprehensive income/(loss) on derivatives (effective portion) [Abstract]            
Interest rate swaps/Unrealized gain/(loss) reclassified to interest expense $ (6,600) $ (5,100)     $ 7,000  
Floating to Fixed Interest Rate Swaps (2017) [Member]            
Derivatives, Fair Value [Line Items]            
Amount of borrowings outstanding, subject to swaps           $ 50,000
Underlying treasury rate term (in years)           1 month
Weighted average interest rate under derivative instruments (in hundredths)           1.693%
Floating to Fixed Interest Rate Swaps [Member]            
Derivatives, Fair Value [Line Items]            
Amount of borrowings outstanding, subject to swaps       $ 225,000    
Underlying treasury rate term (in years)       1 month    
Weighted average interest rate under derivative instruments (in hundredths)       1.678%    
v3.20.4
Commitments and Contingencies (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Lease and Contractual Commitments [Abstract]      
Lease and contractual commitments $ 212,900    
Accrued amount of lease and contractual commitments 58,000    
Contingent Consideration [Abstract]      
Asset acquisition, contingent consideration liability 0 $ 1,200 $ 0
Asset Acquisition Contingent Consideration [Member]      
Contingent Consideration [Abstract]      
Asset acquisition, contingent consideration liability $ 800 $ 5,300  
v3.20.4
Noncontrolling Interests (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Noncontrolling Interests in the Operating Partnership [Roll Forward]                      
Noncontrolling interests in the Operating Partnership, beginning balance       $ 133,216         $ 133,216    
Adjustment of noncontrolling interests in the Operating Partnership to fair value                 (30,617) $ 29,557 $ (33,427)
Conversions of Common Units to Common Stock                 (145) (663) (4,043)
Net income attributable to noncontrolling interests in the Operating Partnership $ 2,254 $ 1,107 $ 1,017 4,960 $ 1,577 $ 737 $ 1,044 $ 193 9,338 3,551 4,588
Distributions to noncontrolling interests in the Operating Partnership                 (5,456) (5,189) (5,167)
Noncontrolling interests in the Operating Partnership, ending balance 112,499       133,216       112,499 133,216  
Net Income Available for Common Stockholders and Transfers From Noncontrolling Interests in the Operating Partnership                      
Net income available for common stockholders $ 82,109 $ 40,304 $ 37,028 185,473 59,852 $ 27,901 $ 39,422 7,255 $ 344,914 134,430 169,343
Ownership Percentage [Member]                      
Noncontrolling Interests in Consolidated Affiliates                      
Consolidated joint venture, partner's interest (in hundredths) 50.00%               50.00%    
Highwoods Properties, Inc. [Member]                      
Noncontrolling Interests in the Operating Partnership [Roll Forward]                      
Noncontrolling interests in the Operating Partnership, beginning balance       $ 133,216       $ 105,960 $ 133,216 105,960  
Adjustment of noncontrolling interests in the Operating Partnership to fair value                 (30,617) 29,557  
Isssuances of Common Units                 6,163 0  
Conversions of Common Units to Common Stock                 (145) (663)  
Net income attributable to noncontrolling interests in the Operating Partnership                 9,338 3,551  
Distributions to noncontrolling interests in the Operating Partnership                 (5,456) (5,189)  
Noncontrolling interests in the Operating Partnership, ending balance $ 112,499       $ 133,216       112,499 133,216 105,960
Net Income Available for Common Stockholders and Transfers From Noncontrolling Interests in the Operating Partnership                      
Net income available for common stockholders                 344,914 134,430 169,343
Increase in additional paid in capital from conversions of Common Units to Common Stock                 145 663 4,043
Issuances of Common Units                 (6,163) 0 0
Change from net income available for common stockholders and transfers from noncontrolling interests                 $ 338,896 $ 135,093 $ 173,386
Variable Interest Entity, Primary Beneficiary [Member] | Ownership Percentage [Member]                      
Noncontrolling Interests in Consolidated Affiliates                      
Consolidated joint venture, partner's interest (in hundredths) 20.00%       20.00%       20.00% 20.00%  
v3.20.4
Disclosure About Fair Value of Financial Instruments - Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Jun. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Dec. 31, 2018
Dec. 31, 2017
Assets:              
Mortgages and notes receivable, at fair value $ 1,341   $ 1,501        
Marketable securities of non-qualified deferred compensation plan (in prepaid expenses and other assets) 2,573   2,345        
Total Assets 3,914   3,846        
Liabilities:              
Mortgages and notes payable, net, at fair value 2,639,163   2,615,776        
Interest rate swaps (in accounts payable, accrued expenses and other liabilities) 846   154        
Non-qualified deferred compensation obligation (in accounts payable, accrued expenses and other liabilities) 2,573   2,345     $ 1,849 $ 2,388
Total Liabilities 2,642,582   2,618,275        
Level 1 [Member]              
Assets:              
Mortgages and notes receivable, at fair value 0   0        
Marketable securities of non-qualified deferred compensation plan (in prepaid expenses and other assets) 2,573   2,345        
Total Assets 2,573   2,345        
Liabilities:              
Mortgages and notes payable, net, at fair value 0   0        
Interest rate swaps (in accounts payable, accrued expenses and other liabilities) 0   0        
Non-qualified deferred compensation obligation (in accounts payable, accrued expenses and other liabilities) 2,573   2,345        
Total Liabilities 2,573   2,345        
Level 2 [Member]              
Assets:              
Mortgages and notes receivable, at fair value 1,341   1,501        
Marketable securities of non-qualified deferred compensation plan (in prepaid expenses and other assets) 0   0        
Total Assets 1,341   1,501        
Liabilities:              
Mortgages and notes payable, net, at fair value 2,639,163   2,615,776        
Interest rate swaps (in accounts payable, accrued expenses and other liabilities) 846   154        
Non-qualified deferred compensation obligation (in accounts payable, accrued expenses and other liabilities) 0   0        
Total Liabilities 2,640,009   2,615,930        
Level 3 [Member]              
Liabilities:              
Impaired real estate assets   $ 2,100   $ 7,600 $ 700    
Highwoods Properties, Inc. [Member]              
Assets:              
Noncontrolling Interests in the Operating Partnership 112,499   133,216        
Highwoods Properties, Inc. [Member] | Level 1 [Member]              
Assets:              
Noncontrolling Interests in the Operating Partnership 112,499   133,216        
Highwoods Properties, Inc. [Member] | Level 2 [Member]              
Assets:              
Noncontrolling Interests in the Operating Partnership $ 0   $ 0        
v3.20.4
Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Class of Stock [Line Items]      
Number of trading days preceeding Redemption Notice Date (in days) 10 days    
Dividends, Common Stock [Abstract]      
Ordinary dividend $ 1.65 $ 1.64 $ 1.48
Capital gains 0.25 0.13 0.31
Return of capital 0.02 0.13 0.06
Total taxability of dividends per share $ 1.92 $ 1.90 1.85
Dividends, Preferred Stock [Abstract]      
Number of shares outstanding, Preferred Stock (in shares) 28,826 28,859  
Carrying value, Preferred Stock $ 28,826 $ 28,859  
Liquidation preference per share, Preferred Stock (in dollars per share) $ 1,000 $ 1,000  
Warrants [Abstract]      
Warrants to acquire Common Stock/Units, outstanding 15,000 15,000  
Exercise price of outstanding warrants (in dollars per share) $ 32.50 $ 32.50  
Series A Cumulative Redeemable Preferred Shares [Member]      
Dividends, Preferred Stock [Abstract]      
Ordinary dividend 74.96 79.90 71.22
Capital gains 11.29 6.35 15.03
Total taxability of dividends per share $ 86.25 $ 86.25 86.25
Issuance date, Preferred Stock/Unit Feb. 12, 1997 Feb. 12, 1997  
Liquidation preference per share, Preferred Stock (in dollars per share) $ 1,000 $ 1,000  
Optional redemption date, Preferred Stock/Unit Feb. 12, 2027 Feb. 12, 2027  
Annual dividends payable per share, Preferred Stock/Unit (in dollars per share) $ 86.25 $ 86.25 86.25
Highwoods Properties, Inc. [Member]      
Class of Stock [Line Items]      
Possible future share issuance authorized under charter 96,100,000    
Dividends declared per share of Common Stock (in dollars per share) $ 1.92 1.90 1.85
Highwoods Properties, Inc. [Member] | Series A Cumulative Redeemable Preferred Shares [Member]      
Dividends, Preferred Stock [Abstract]      
Total taxability of dividends per share 86.25 86.25 86.25
Annual dividends payable per share, Preferred Stock/Unit (in dollars per share) 86.25 86.25 86.25
Highwoods Realty Limited Partnership [Member]      
Class of Stock [Line Items]      
Distributions declared per share of Common Unit (in dollars per share) $ 1.92 $ 1.90 1.85
Dividends, Preferred Stock [Abstract]      
Number of units outstanding, Preferred Units (in shares) 28,826 28,859  
Carrying value, Preferred units $ 28,826 $ 28,859  
Liquidation preference per unit, Preferred Units (in dollars per share) $ 1,000 $ 1,000  
Highwoods Realty Limited Partnership [Member] | Series A Cumulative Redeemable Preferred Shares [Member]      
Dividends, Preferred Stock [Abstract]      
Total taxability of dividends per share $ 86.25 $ 86.25 86.25
Issuance date, Preferred Stock/Unit Feb. 12, 1997 Feb. 12, 1997  
Liquidation preference per unit, Preferred Units (in dollars per share) $ 1,000 $ 1,000  
Optional redemption date, Preferred Stock/Unit Feb. 12, 2027 Feb. 12, 2027  
Annual dividends payable per share, Preferred Stock/Unit (in dollars per share) $ 86.25 $ 86.25 $ 86.25
v3.20.4
Employee Benefit Plans (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Retirement Benefits [Abstract]      
Outstanding stock options and warrants 552,373 599,902  
Possible future share issuance authorized under equity incentive plans 1,926,324 2,016,659  
Total shares reserved for future issuance 2,478,697 2,616,561  
Possible future share issuance authorized under equity incentive plan restricted stock 300,000    
Stock-based compensation expense $ 6,210 $ 7,180 $ 7,466
Total unrecognized stock-based compensation costs $ 5,200    
Weighted average remaining term of vesting periods (in years) 1 year 10 months 24 days    
401(k) Savings Plan [Abstract]      
401(k) employer match percentage 75.00%    
401(k) employer match salary limit percentage 6.00%    
401(k) employer contribution $ 1,400 1,500 1,400
Retirement Plan [Abstract]      
Retirement plan qualification years of service (in years) 30 years    
Retirement plan qualification age 55 years    
Retirement plan qualification minimum years of service (in years) 10 years    
Retirement plan immediate vesting percentage 100.00%    
Deferred Compensation [Abstract]      
Marketable securities of non-qualified deferred compensation plan fair value disclosure $ 2,573 2,345  
Non Qualified Deferred Compensation Obligation Fair Value Disclosure [Roll Forward]      
Beginning deferred compensation liability 2,345 1,849 2,388
Mark to market adjustment to deferred compensation (in general and administrative expenses) 228 496 (182)
Distributions from deferred compensation plans 0 0 (357)
Ending deferred compensation liability $ 2,573 $ 2,345 $ 1,849
Employee Stock Purchase Plan [Abstract]      
Employee stock purchase plan salary limit percentage 25.00%    
Employee stock purchase plan market percentage 85.00%    
Number of days at end of quarter used to calculate ESPP discount 5 days    
Shares of Common Stock issued under the employee stock purchase plans 47,208 38,618 38,951
Discount percentage on newly issues shares 15.00%    
Discount on newly issued shares expensed as additional compensation $ 300 $ 300 $ 300
Minimum [Member]      
Retirement Benefits [Abstract]      
Officer cash bonus target 35.00%    
Officer cash bonus performance factor 0.00%    
Non officer management cash bonus target 10.00%    
Maximum [Member]      
Retirement Benefits [Abstract]      
Officer cash bonus target 130.00%    
Officer cash bonus performance factor 200.00%    
Non officer management cash bonus target 30.00%    
2017 Plan [Member]      
Restricted Stock Activity Rollforward [Abstract]      
Forfeited (in shares) (46,852)    
2016 Plan [Member]      
Restricted Stock Activity Rollforward [Abstract]      
Forfeited (in shares)   (9,521)  
2015 Plan [Member]      
Restricted Stock Activity Rollforward [Abstract]      
Forfeited (in shares)     (13,707)
Stock Options [Member]      
Stock Option Activity Rollforward [Abstract]      
Balance of options outstanding (in shares) 584,902 596,518 640,822
Options exercised (in shares) (42,163) (9,026) (44,304)
Options forfeited (in shares) (5,366) (2,590)  
Balance of options outstanding (in shares) 537,373 584,902 596,518
Stock Option Activity, Weighted Average Exercise Price Rollforward [Abstract]      
Options outstanding, weighted average exercise price (in dollars per share) $ 45.75 $ 45.67 $ 45.29
Options exercised, weighted average exercise price (in dollars per share) 41.10 39.53 40.15
Options forfeited, weighted average exercise price (in dollars per share) 50.82 48.79  
Options outstanding, weighted average exercise price (in dollars per share) $ 46.07 $ 45.75 $ 45.67
Weighted average remaining life of outstanding options (in years) 5 years    
Options exercisable (in shares) 496,656    
Weighted average exercise price (in dollars per share) $ 45.54    
Weighted average remaining life (in years) 4 years 10 months 24 days    
Intrinsic value $ 100    
Amount of exercisable options with prices higher than the market price of Company Common Stock 436,880    
Cash received or receivable from options exercised $ 1,900 $ 400 $ 1,900
Total instrinsic value of options exercised 400 100 400
Total intrinsic value of options outstanding $ 100 $ 2,400 $ 100
2014 to 2017 Stock Options [Member]      
Retirement Benefits [Abstract]      
Vesting term of stock options issued/Period for absolute total return of restricted stock issued (in years) 4 years    
Option expiration period (in years) 10 years    
Time-Based Restricted Stock [Member]      
Retirement Benefits [Abstract]      
Vesting term of stock options issued/Period for absolute total return of restricted stock issued (in years) 4 years    
Restricted Stock Activity Rollforward [Abstract]      
Balance of restricted stock outstanding (in shares) 218,151 191,239 172,246
Awarded and issued (in shares) 83,116 103,590 94,984
Vested (in shares) (88,326) (73,036) (73,307)
Forfeited (in shares) (3,751) (3,642) (2,684)
Balance of restricted stock outstanding (in shares) 209,190 218,151 191,239
Restricted Stock Activity, Weighted Average Grant Date Fair Value Rollforward [Abstract]      
Restricted stock outstanding, weighted average grant date fair value (in dollars per share) $ 45.73 $ 45.62 $ 46.46
Awarded and issued, weighted average grant date fair value (in dollars per share) 44.88 45.98 43.01
Vested, weighted average grant date fair value (in dollars per share) 45.86 45.79 44.19
Forfeited, weighted average grant date fair value (in dollars per share) 45.78 46.07 45.89
Restricted stock outstanding, weighted average grant date fair value (in dollars per share) 45.34 45.73 45.62
Grant date fair value of restricted stock (in dollars per share) $ 44.88 $ 45.98 $ 43.01
Fair value at grant date of restricted stock issued $ 3,700 $ 4,800 $ 4,100
Vesting date fair value of restricted stock $ 3,900 $ 3,300 $ 3,200
Total Return-Based Restricted Stock [Member]      
Retirement Benefits [Abstract]      
Vesting term of stock options issued/Period for absolute total return of restricted stock issued (in years) 3 years    
Assumptions Used in Determining Fair Values of Restricted Stock Granted:      
Risk free interest rate 0.90% 2.40% 2.30%
Common stock dividend yield 3.90% 4.40% 3.90%
Expected volatility rate 20.40% 27.30% 41.10%
Dividends paid for previous year 1 year    
Restricted Stock Activity Rollforward [Abstract]      
Balance of restricted stock outstanding (in shares) 208,848 180,094 160,724
Awarded and issued (in shares) 66,188 87,344 77,456
Vested (in shares)   (45,901) (41,160)
Forfeited (in shares) (49,852) (12,689) (16,926)
Balance of restricted stock outstanding (in shares) 225,184 208,848 180,094
Restricted Stock Activity, Weighted Average Grant Date Fair Value Rollforward [Abstract]      
Restricted stock outstanding, weighted average grant date fair value (in dollars per share) $ 42.22 $ 43.34 $ 44.72
Awarded and issued, weighted average grant date fair value (in dollars per share) 38.31 39.42 40.81
Vested, weighted average grant date fair value (in dollars per share)   43.68 45.61
Forfeited, weighted average grant date fair value (in dollars per share) 51.93 43.58 45.24
Restricted stock outstanding, weighted average grant date fair value (in dollars per share) $ 39.53 $ 42.22 43.34
Company total return, total return-based restricted stock 100.00%    
Vesting percentage, total return-based restricted stock 100.00% 75.00%  
Grant date fair value of restricted stock (in dollars per share) $ 38.31 $ 39.42 $ 40.81
Fair value at grant date of restricted stock issued $ 2,500 $ 3,400 $ 3,200
Vesting date fair value of restricted stock $ 0 $ 2,100 $ 1,800
Period preceding date of grant 3 months    
Total Return-Based Restricted Stock [Member] | Minimum [Member]      
Restricted Stock Activity, Weighted Average Grant Date Fair Value Rollforward [Abstract]      
Percentage of return-based restricted stock issued to officers that will vest 0.00%    
Total Return-Based Restricted Stock [Member] | Maximum [Member]      
Restricted Stock Activity, Weighted Average Grant Date Fair Value Rollforward [Abstract]      
Percentage of return-based restricted stock issued to officers that will vest 150.00%    
Total Return-Based Restricted Stock Current Year Issuance [Member]      
Restricted Stock Activity, Weighted Average Grant Date Fair Value Rollforward [Abstract]      
Awarded and issued, weighted average grant date fair value (in dollars per share) $ 38.31 $ 39.42 $ 40.81
Grant date fair value of restricted stock (in dollars per share) $ 38.31 $ 39.42 $ 40.81
v3.20.4
Accumulated Other Comprehensive Income/(Loss) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Accumulated Other Comprehensive Income/(Loss) Calculation [Roll Forward]    
Beginning balance $ (471)  
Ending balance (1,462) $ (471)
Cash Flow Hedges [Member]    
Accumulated Other Comprehensive Income/(Loss) Calculation [Roll Forward]    
Beginning balance (471) 9,913
Unrealized losses on cash flow hedges (1,238) (9,134)
Amortization reclassified out of accumulated other comprehensive income/(loss) $ 247 (1,250)
Ending balance   $ (471)
v3.20.4
Real Estate and Other Assets Held For Sale (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Assets, held for sale [Abstract]    
Land $ 2,612 $ 4,815
Building and tenant improvements 12,238 29,581
Less accumulated depreciation (3,577) (16,775)
Net real estate assets 11,273 17,621
Accrued straight-line rents receivable, net 0 2,073
Deferred leasing costs, net 87 1,096
Real estate and other assets, net, held for sale $ 11,360 $ 20,790
v3.20.4
Earnings Per Share and Per Unit (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Earnings per Common Share/Unit - basic: [Abstract]                      
Net income $ 85,287 $ 42,331 $ 38,956 $ 191,340 $ 62,346 $ 29,557 $ 41,394 $ 8,386 $ 357,914 $ 141,683 $ 177,630
Net (income) attributable to noncontrolling interests in the Operating Partnership                 (9,338) (3,551) (4,588)
Net (income) attributable to noncontrolling interests in consolidated affiliates (302) (298) (289) (285) (295) (297) (306) (316) (1,174) (1,214) (1,207)
Dividends on Preferred Stock (622) (622) (622) (622) (622) (622) (622) (622) (2,488) (2,488) (2,492)
Net income available for common stockholders $ 82,109 $ 40,304 $ 37,028 $ 185,473 $ 59,852 $ 27,901 $ 39,422 $ 7,255 $ 344,914 $ 134,430 $ 169,343
Denominator:                      
Denominator for basic earnings per Common Share - weighted average shares (in shares)                 103,876 103,692 103,439
Earnings per Common Share - basic:                      
Net income available for common stockholders (in dollars per share) $ 0.79 $ 0.39 $ 0.36 $ 1.79 $ 0.58 $ 0.27 $ 0.38 $ 0.07 $ 3.32 $ 1.30 $ 1.64
Earnings per Common Share/Unit - diluted: [Abstract]                      
Net income $ 85,287 $ 42,331 $ 38,956 $ 191,340 $ 62,346 $ 29,557 $ 41,394 $ 8,386 $ 357,914 $ 141,683 $ 177,630
Net (income) attributable to noncontrolling interests in consolidated affiliates (302) (298) (289) (285) (295) (297) (306) (316) (1,174) (1,214) (1,207)
Dividends on Preferred Stock $ (622) $ (622) $ (622) $ (622) $ (622) $ (622) $ (622) $ (622) (2,488) (2,488) (2,492)
Net income available for common stockholders before net (income) attributable to noncontrolling interests in the Operating Partnership                 $ 354,252 $ 137,981 $ 173,931
Denominator:                      
Denominator for basic earnings per Common Share - weighted average shares (in shares)                 103,876 103,692 103,439
Stock options using the treasury method                 8 22 33
Noncontrolling interests Common Units                 2,830 2,731 2,796
Denominator for diluted earnings per Common Share - adjusted weighted average shares and assumed conversions (in shares)                 106,714 106,445 106,268
Earnings per Common Share - diluted:                      
Net income available for common stockholders (in dollars per share) $ 0.79 $ 0.39 $ 0.36 $ 1.79 $ 0.58 $ 0.27 $ 0.38 $ 0.07 $ 3.32 $ 1.30 $ 1.64
Highwoods Realty Limited Partnership [Member]                      
Earnings per Common Share/Unit - basic: [Abstract]                      
Net income $ 85,287 $ 42,331 $ 38,956 $ 191,340 $ 62,346 $ 29,557 $ 41,394 $ 8,386 $ 357,914 $ 141,683 $ 177,630
Net (income) attributable to noncontrolling interests in consolidated affiliates (302) (298) (289) (285) (295) (297) (306) (316) (1,174) (1,214) (1,207)
Distributions on Preferred Units (622) (622) (622) (622) (622) (622) (622) (622) (2,488) (2,488) (2,492)
Net income available for common unitholders $ 84,363 $ 41,411 $ 38,045 $ 190,433 $ 61,429 $ 28,638 $ 40,466 $ 7,448 $ 354,252 $ 137,981 $ 173,931
Denominator:                      
Denominator for basic earnings per Common Unit - weighted average units (in shares)                 106,297 106,014 105,826
Earnings per Common Unit - basic:                      
Net income available for common unitholders (in dollars per share) $ 0.79 $ 0.39 $ 0.36 $ 1.79 $ 0.58 $ 0.27 $ 0.38 $ 0.07 $ 3.33 $ 1.30 $ 1.64
Earnings per Common Share/Unit - diluted: [Abstract]                      
Net income $ 85,287 $ 42,331 $ 38,956 $ 191,340 $ 62,346 $ 29,557 $ 41,394 $ 8,386 $ 357,914 $ 141,683 $ 177,630
Net (income) attributable to noncontrolling interests in consolidated affiliates (302) (298) (289) (285) (295) (297) (306) (316) (1,174) (1,214) (1,207)
Distributions on Preferred Units (622) (622) (622) (622) (622) (622) (622) (622) (2,488) (2,488) (2,492)
Net income available for common unitholders $ 84,363 $ 41,411 $ 38,045 $ 190,433 $ 61,429 $ 28,638 $ 40,466 $ 7,448 $ 354,252 $ 137,981 $ 173,931
Denominator:                      
Denominator for basic earnings per Common Unit - weighted average units (in shares)                 106,297 106,014 105,826
Stock options using the treasury method                 8 22 33
Denominator for diluted earnings per Common Unit - adjusted weighted average units and assumed conversions (in shares)                 106,305 106,036 105,859
Earnings per Common Unit - diluted:                      
Net income available for common unitholders (in dollars per share) $ 0.79 $ 0.39 $ 0.36 $ 1.79 $ 0.58 $ 0.27 $ 0.38 $ 0.07 $ 3.33 $ 1.30 $ 1.64
v3.20.4
Income Taxes (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Highwoods Properties, Inc. [Member]      
Income Tax Disclosure [Line Items]      
Minimum dividend required to maintain REIT status (in dollars per share) $ 1.41 $ 1.44 $ 1.26
Tax basis of assets $ 4,700,000 $ 4,700,000  
Tax basis of liabilities 2,800,000 2,900,000  
Income Tax Expense/(Benefit) [Abstract]      
Current federal tax expense 110 202 $ 133
Current state tax expense 240 148 112
Current tax expense 350 350 245
Deferred federal tax expense/(benefit) (9) 14 (95)
Deferred state tax benefit (4) (120) (68)
Deferred tax benefit (13) (106) (163)
Total income tax expense 337 244 $ 82
Net deferred tax liabilities 100 100  
Highwoods Realty Limited Partnership [Member]      
Income Tax Disclosure [Line Items]      
Tax basis of assets 4,600,000 4,700,000  
Tax basis of liabilities $ 2,800,000 $ 2,900,000  
v3.20.4
Segment Information (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Segment Reporting Information [Abstract]                      
Rental and other revenues $ 179,904 $ 181,043 $ 183,153 $ 192,800 $ 192,071 $ 187,475 $ 184,070 $ 172,363 $ 736,900 $ 735,979 $ 720,035
Total net operating income                 505,075 487,468 477,620
Reconciliation to net income:                      
Depreciation and amortization                 (241,585) (254,504) (229,955)
Impairments of real estate assets                 (1,778) (5,849) (423)
General and administrative expenses                 (41,031) (44,067) (40,006)
Interest expense                 (80,962) (81,648) (71,422)
Other income/(loss)                 (1,707) (2,510) 1,940
Gains on disposition of property                 215,897 39,517 37,638
Equity in earnings of unconsolidated affiliates                 4,005 3,276 2,238
Net income 85,287 $ 42,331 $ 38,956 $ 191,340 62,346 $ 29,557 $ 41,394 $ 8,386 357,914 141,683 177,630
Total Assets 5,209,417       5,138,244       5,209,417 5,138,244  
Office Atlanta, GA [Member]                      
Segment Reporting Information [Abstract]                      
Rental and other revenues                 146,704 151,279 141,337
Total net operating income                 95,448 97,019 87,503
Reconciliation to net income:                      
Total Assets 1,011,807       1,040,869       1,011,807 1,040,869  
Office Charlotte, NC [Member]                      
Segment Reporting Information [Abstract]                      
Rental and other revenues                 35,733 4,650 0
Total net operating income                 28,431 3,791 0
Reconciliation to net income:                      
Total Assets 443,051       425,045       443,051 425,045  
Office Nashville, TN [Member]                      
Segment Reporting Information [Abstract]                      
Rental and other revenues                 138,089 133,867 121,836
Total net operating income                 99,901 97,386 88,554
Reconciliation to net income:                      
Total Assets 1,191,219       1,045,125       1,191,219 1,045,125  
Office Orlando, FL [Member]                      
Segment Reporting Information [Abstract]                      
Rental and other revenues                 49,459 52,679 53,771
Total net operating income                 29,546 32,062 32,841
Reconciliation to net income:                      
Total Assets 289,129       289,743       289,129 289,743  
Office Pittsburgh, PA [Member]                      
Segment Reporting Information [Abstract]                      
Rental and other revenues                 58,518 60,755 61,177
Total net operating income                 35,631 36,249 36,233
Reconciliation to net income:                      
Total Assets 313,783       323,792       313,783 323,792  
Office Raleigh, NC [Member]                      
Segment Reporting Information [Abstract]                      
Rental and other revenues                 128,189 122,173 118,352
Total net operating income                 95,926 88,402 86,053
Reconciliation to net income:                      
Total Assets 839,831       830,128       839,831 830,128  
Office Richmond, VA [Member]                      
Segment Reporting Information [Abstract]                      
Rental and other revenues                 48,079 49,428 45,729
Total net operating income                 33,667 33,756 31,276
Reconciliation to net income:                      
Total Assets 240,976       246,546       240,976 246,546  
Office Tampa, FL [Member]                      
Segment Reporting Information [Abstract]                      
Rental and other revenues                 99,520 86,431 102,404
Total net operating income                 67,059 50,339 65,819
Reconciliation to net income:                      
Total Assets 556,951       521,620       556,951 521,620  
Other Segment [Member]                      
Segment Reporting Information [Abstract]                      
Rental and other revenues                 32,609 74,717 75,429
Total net operating income                 19,466 48,464 49,341
Reconciliation to net income:                      
Total Assets 322,670       415,376       322,670 415,376  
Office Total Segment [Member]                      
Segment Reporting Information [Abstract]                      
Rental and other revenues                 704,291 661,262 644,606
Total net operating income                 485,609 439,004 $ 428,279
Reconciliation to net income:                      
Total Assets $ 4,886,747       $ 4,722,868       $ 4,886,747 $ 4,722,868  
v3.20.4
Quarterly Financial Data (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Quarterly Financial Data [Line Items]                      
Rental and other revenues $ 179,904 $ 181,043 $ 183,153 $ 192,800 $ 192,071 $ 187,475 $ 184,070 $ 172,363 $ 736,900 $ 735,979 $ 720,035
Net income 85,287 42,331 38,956 191,340 62,346 29,557 41,394 8,386 357,914 141,683 177,630
Net (income) attributable to noncontrolling interests in the Operating Partnership (2,254) (1,107) (1,017) (4,960) (1,577) (737) (1,044) (193) (9,338) (3,551) (4,588)
Net (income) attributable to noncontrolling interests in consolidated affiliates (302) (298) (289) (285) (295) (297) (306) (316) (1,174) (1,214) (1,207)
Dividends on Preferred Stock (622) (622) (622) (622) (622) (622) (622) (622) (2,488) (2,488) (2,492)
Net income available for common stockholders $ 82,109 $ 40,304 $ 37,028 $ 185,473 $ 59,852 $ 27,901 $ 39,422 $ 7,255 $ 344,914 $ 134,430 $ 169,343
Earnings per Common Share - basic:                      
Net income available for common stockholders (in dollars per share) $ 0.79 $ 0.39 $ 0.36 $ 1.79 $ 0.58 $ 0.27 $ 0.38 $ 0.07 $ 3.32 $ 1.30 $ 1.64
Earnings per Common Share - diluted:                      
Net income available for common stockholders (in dollars per share) $ 0.79 $ 0.39 $ 0.36 $ 1.79 $ 0.58 $ 0.27 $ 0.38 $ 0.07 $ 3.32 $ 1.30 $ 1.64
Highwoods Properties, Inc. [Member]                      
Quarterly Financial Data [Line Items]                      
Net (income) attributable to noncontrolling interests in the Operating Partnership                 $ (9,338) $ (3,551)  
Net income available for common stockholders                 344,914 134,430 $ 169,343
Highwoods Realty Limited Partnership [Member]                      
Quarterly Financial Data [Line Items]                      
Rental and other revenues $ 179,904 $ 181,043 $ 183,153 $ 192,800 $ 192,071 $ 187,475 $ 184,070 $ 172,363 736,900 735,979 720,035
Net income 85,287 42,331 38,956 191,340 62,346 29,557 41,394 8,386 357,914 141,683 177,630
Net (income) attributable to noncontrolling interests in consolidated affiliates (302) (298) (289) (285) (295) (297) (306) (316) (1,174) (1,214) (1,207)
Distributions on Preferred Units (622) (622) (622) (622) (622) (622) (622) (622) (2,488) (2,488) (2,492)
Net income available for common unitholders $ 84,363 $ 41,411 $ 38,045 $ 190,433 $ 61,429 $ 28,638 $ 40,466 $ 7,448 $ 354,252 $ 137,981 $ 173,931
Earnings per Common Unit - basic:                      
Net income available for common unitholders (in dollars per share) $ 0.79 $ 0.39 $ 0.36 $ 1.79 $ 0.58 $ 0.27 $ 0.38 $ 0.07 $ 3.33 $ 1.30 $ 1.64
Earnings per Common Unit - diluted:                      
Net income available for common unitholders (in dollars per share) $ 0.79 $ 0.39 $ 0.36 $ 1.79 $ 0.58 $ 0.27 $ 0.38 $ 0.07 $ 3.33 $ 1.30 $ 1.64
v3.20.4
Subsequent Events (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Feb. 02, 2021
$ / shares
Jan. 15, 2021
USD ($)
Jan. 21, 2021
USD ($)
ft²
propertyUnit
Dec. 31, 2020
USD ($)
ft²
$ / shares
Dec. 31, 2019
USD ($)
$ / shares
Dec. 31, 2018
USD ($)
$ / shares
Subsequent Event [Line Items]            
Gains on disposition of property       $ 215,897 $ 39,517 $ 37,638
Rentable square feet of commercial real estate (in square feet) | ft²       27,200,000    
Percentage of equity interest in joint ventures, maximum       50.00%    
Highwoods Properties, Inc. [Member]            
Subsequent Event [Line Items]            
Dividends declared per share of Common Stock (in dollars per share) | $ / shares       $ 1.92 $ 1.90 $ 1.85
Highwoods Properties, Inc. [Member] | Subsequent Event [Member]            
Subsequent Event [Line Items]            
Dividends declared per share of Common Stock (in dollars per share) | $ / shares $ 0.48          
2021 Dispositions [Member] | Subsequent Event [Member]            
Subsequent Event [Line Items]            
Sale price of disposition   $ 30,700        
Gains on disposition of property   $ 18,900        
Forum Portfolio Acquisition [Member] | Subsequent Event [Member]            
Subsequent Event [Line Items]            
Percentage of partner's interest in asset acquired (in hundredths)     75.00%      
Number of buildings sold | propertyUnit     5      
Rentable square feet of commercial real estate (in square feet) | ft²     636,000      
Purchase price of acquisition     $ 131,300      
Percentage of equity interest in joint ventures, maximum     25.00%      
v3.20.4
Schedule III (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets $ 5,776,804 $ 5,776,804 $ 5,173,754 $ 5,594,833 $ 5,776,804 $ 5,296,551
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,421,956 1,296,562 1,211,728 1,421,956 1,405,341 1,296,562
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Federal Income Tax Basis       5,500,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,776,804 5,776,804 5,173,754 5,594,833 5,776,804 5,296,551
Development in process exclusive of land included in Schedule III       259,681 172,706 165,537
Real estate assets, net, held for sale       (14,850) (34,396) 0
Total real estate assets       5,839,664 5,915,114 5,462,088
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,421,956 1,296,562 1,211,728 1,421,956 1,405,341 1,296,562
Real estate assets, net, held for sale       (3,577) (16,775) 0
Total accumulated depreciation       1,418,379 $ 1,388,566 $ 1,296,562
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, beginning balance 5,776,804 5,296,551 5,173,754      
Acquisitions, development and improvements 259,470 677,842 274,863      
Cost of real estate sold and retired (441,441) (197,589) (152,066)      
Real estate assets, ending balance 5,594,833 5,776,804 5,296,551      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, beginning balance 1,405,341 1,296,562 1,211,728      
Depreciation expense 204,585 214,682 191,035      
Real estate sold and retired (187,970) (105,903) (106,201)      
Accumulated depreciation, ending balance 1,421,956 $ 1,405,341 $ 1,296,562      
Atlanta, GA - 1700 Century Circle [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       2,482    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       2    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,478    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,960    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,962     3,962    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,925     1,925    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,962     3,962    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,925     1,925    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 3,962          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 1,925          
Atlanta, GA - 1800 Century Boulevard [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,444    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       29,081    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       11,265    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,444    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       40,346    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 41,790     41,790    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 24,040     24,040    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 41,790     41,790    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 24,040     24,040    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 41,790          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 24,040          
Atlanta, GA - 1825 Century Boulevard [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       864    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       303    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       15,166    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,167    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       15,166    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,333     16,333    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,729     6,729    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 16,333     16,333    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,729     6,729    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 16,333          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 6,729          
Atlanta, GA - 1875 Century Boulevard [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       8,924    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       8,329    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       17,253    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,253     17,253    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,706     8,706    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 17,253     17,253    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,706     8,706    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 17,253          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 8,706          
Atlanta, GA - 1900 Century Boulevard [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       4,744    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       710    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,454    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,454     5,454    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,341     5,341    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,454     5,454    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,341     5,341    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 5,454          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,341          
Atlanta, GA - 2200 Century Parkway [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       14,432    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       9,059    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       23,491    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 23,491     23,491    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 11,732     11,732    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 23,491     23,491    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 11,732     11,732    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 23,491          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 11,732          
Atlanta, GA - 2400 Century Center [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       406    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       14,776    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       406    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       14,776    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,182     15,182    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,686     7,686    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 15,182     15,182    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,686     7,686    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 15,182          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 7,686          
Atlanta, GA - 2500 Century Center [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       328    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       12,684    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       328    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,684    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,012     13,012    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,589     4,589    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,012     13,012    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,589     4,589    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 13,012          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,589          
Atlanta, GA - 2500/2635 Parking Garage [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,447    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,447    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,447     6,447    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,424     2,424    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,447     6,447    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,424     2,424    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 6,447          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,424          
Atlanta, GA - 2600 Century Parkway [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       10,679    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,244    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       14,923    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,923     14,923    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,898     7,898    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,923     14,923    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,898     7,898    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 14,923          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 7,898          
Atlanta, GA - 2635 Century Parkway [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       21,643    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       20,514    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       42,157    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 42,157     42,157    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 18,043     18,043    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 42,157     42,157    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 18,043     18,043    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 42,157          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 18,043          
Atlanta, GA - 2800 Century Parkway [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       20,449    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,653    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       31,102    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 31,102     31,102    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 17,782     17,782    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 31,102     31,102    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 17,782     17,782    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 31,102          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 17,782          
Atlanta, GA - 50 Glenlake [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,500    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       20,006    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,308    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,500    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       24,314    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 26,814     26,814    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 13,172     13,172    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 26,814     26,814    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 13,172     13,172    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 26,814          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 13,172          
Atlanta, GA - Century Plaza I [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,290    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       8,567    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,022    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,290    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       13,589    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,879     14,879    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,872     6,872    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,879     14,879    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,872     6,872    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 14,879          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 6,872          
Atlanta, GA - Century Plaza II [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,380    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       7,733    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,108    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,380    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,841    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,221     12,221    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,559     5,559    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,221     12,221    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,559     5,559    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 12,221          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,559          
Atlanta, GA - 5405 Windward Parkway [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       3,342    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       32,111    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       19,729    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,342    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       51,840    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 55,182     55,182    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 26,543     26,543    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 55,182     55,182    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 26,543     26,543    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 55,182          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 26,543          
Atlanta, GA - Riverpoint - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       7,250    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (4,439)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       718    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,811    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       718    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,529     3,529    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 185     185    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,529     3,529    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 185     185    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 3,529          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 185          
Atlanta, GA - Riverwood 100 [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       5,785    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       64,913    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (29)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       26,071    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       5,756    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       90,984    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 96,740     96,740    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 23,842     23,842    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 96,740     96,740    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 23,842     23,842    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 96,740          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 23,842          
Atlanta, GA - Tradeport - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       5,243    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (4,819)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       424    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 424     424    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 424     424    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 424          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Atlanta, GA - Two Alliance Center [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       9,579    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       125,549    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       906    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       9,579    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       126,455    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 136,034     136,034    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 33,618     33,618    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 136,034     136,034    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 33,618     33,618    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 136,034          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 33,618          
Atlanta, GA - One Alliance Center [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       14,775    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       123,071    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       17,587    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       14,775    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       140,658    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 155,433     155,433    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 32,298     32,298    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 155,433     155,433    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 32,298     32,298    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 155,433          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 32,298          
Atlanta, GA - 10 Glenlake North [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       5,349    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       26,334    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       11,303    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       5,349    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       37,637    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 42,986     42,986    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,897     10,897    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 42,986     42,986    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,897     10,897    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 42,986          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 10,897          
Atlanta, GA - 10 Glenlake South [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       5,103    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       22,811    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,523    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       5,103    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       26,334    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 31,437     31,437    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,056     7,056    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 31,437     31,437    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,056     7,056    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 31,437          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 7,056          
Atlanta, GA - Riverwood 200 [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       4,777    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       89,708    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       450    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,905    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       5,227    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       92,613    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 97,840     97,840    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 11,172     11,172    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 97,840     97,840    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 11,172     11,172    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 97,840          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 11,172          
Atlanta, GA - Riverwood 300 - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       400    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       710    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       400    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       710    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,110     1,110    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 70     70    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,110     1,110    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 70     70    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 1,110          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 70          
Atlanta, GA - Monarch Tower [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       22,717    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       143,068    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       17,074    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       22,717    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       160,142    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 182,859     182,859    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 25,234     25,234    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 182,859     182,859    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 25,234     25,234    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 182,859          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 25,234          
Atlanta, GA - Monarch Plaza [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       27,678    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       88,962    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       11,147    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       27,678    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       100,109    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 127,787     127,787    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 15,755     15,755    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 127,787     127,787    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 15,755     15,755    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 127,787          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 15,755          
Charlotte, NC - Bank of America Tower [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       29,273    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       354,749    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       20,087    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       29,273    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       374,836    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 404,109     404,109    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,090     12,090    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 404,109     404,109    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,090     12,090    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 404,109          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 12,090          
Nashville, TN - 3322 West End [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       3,025    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       27,490    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       11,806    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,025    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       39,296    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 42,321     42,321    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 18,539     18,539    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 42,321     42,321    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 18,539     18,539    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 42,321          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 18,539          
Nashville, TN - 3401 West End [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       5,862    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       22,917    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,566    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       5,862    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       29,483    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 35,345     35,345    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 16,114     16,114    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 35,345     35,345    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 16,114     16,114    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 35,345          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 16,114          
Nashville, TN - 5310 Maryland Way [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,863    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       7,201    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,809    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,863    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       11,010    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,873     12,873    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,540     6,540    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,873     12,873    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,540     6,540    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 12,873          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 6,540          
Nashville, TN - Cool Springs I & II Deck [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,990    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,990    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,990     3,990    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,314     1,314    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,990     3,990    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,314     1,314    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 3,990          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 1,314          
Nashville, TN - Cool Springs III & IV Deck [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,463    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,463    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,463     4,463    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,535     1,535    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,463     4,463    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,535     1,535    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 4,463          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 1,535          
Nashville, TN - Cool Springs I [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,583    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       15    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       15,891    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,598    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       15,891    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,489     17,489    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,396     7,396    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 17,489     17,489    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,396     7,396    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 17,489          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 7,396          
Nashville, TN - Cool Springs II [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,824    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       346    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       24,705    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,170    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       24,705    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 26,875     26,875    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,089     10,089    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 26,875     26,875    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,089     10,089    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 26,875          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 10,089          
Nashville, TN - Cool Springs III [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,631    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       804    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       16,241    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,435    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       16,241    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 18,676     18,676    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,698     5,698    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 18,676     18,676    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,698     5,698    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 18,676          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,698          
Nashville, TN - Cool Springs IV [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,715    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       19,221    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,715    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       19,221    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 20,936     20,936    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,131     6,131    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 20,936     20,936    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,131     6,131    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 20,936          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 6,131          
Nashville, TN - Cool Springs V (Healthways) [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       3,688    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       295    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       53,100    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,983    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       53,100    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 57,083     57,083    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 23,044     23,044    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 57,083     57,083    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 23,044     23,044    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 57,083          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 23,044          
Nashville, TN - Harpeth on the Green II [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,419    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       5,677    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,216    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,419    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,893    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,312     10,312    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,607     4,607    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,312     10,312    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,607     4,607    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 10,312          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,607          
Nashville, TN - Harpeth on the Green III [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,660    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       6,649    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,263    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,660    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,912    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,572     10,572    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,015     5,015    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,572     10,572    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,015     5,015    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 10,572          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,015          
Nashville, TN - Harpeth on the Green IV [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,713    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       6,842    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,171    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,713    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,013    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,726     11,726    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,598     5,598    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 11,726     11,726    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,598     5,598    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 11,726          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,598          
Nashville, TN - Harpeth on The Green V [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       662    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       197    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,795    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       859    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,795    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,654     6,654    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,686     2,686    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,654     6,654    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,686     2,686    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 6,654          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,686          
Nashville, TN - Hickory Trace [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,164    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       164    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,111    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,328    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,111    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,439     7,439    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,474     2,474    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,439     7,439    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,474     2,474    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 7,439          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,474          
Nashville, TN - Highwoods Plaza I [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,552    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       307    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       9,951    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,859    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,951    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,810     11,810    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,020     5,020    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 11,810     11,810    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,020     5,020    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 11,810          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,020          
Nashville, TN - Highwoods Plaza II [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,448    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       307    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       9,600    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,755    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,600    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,355     11,355    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,988     4,988    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 11,355     11,355    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,988     4,988    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 11,355          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,988          
Nashville, TN - Seven Springs I [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,076    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       592    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       13,216    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,668    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       13,216    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,884     15,884    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,916     5,916    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 15,884     15,884    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,916     5,916    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 15,884          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,916          
Nashville, TN - SouthPointe [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,655    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       310    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       9,430    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,965    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,430    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,395     11,395    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,107     4,107    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 11,395     11,395    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,107     4,107    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 11,395          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,107          
Nashville, TN - Ramparts [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,394    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       12,806    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,313    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,394    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       23,119    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 25,513     25,513    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,057     9,057    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 25,513     25,513    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,057     9,057    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 25,513          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 9,057          
Nashville, TN - Westwood South [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,106    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       382    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       12,317    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,488    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,317    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,805     14,805    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,168     6,168    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,805     14,805    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,168     6,168    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 14,805          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 6,168          
Nashville, TN - 100 Winners Circle [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,497    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       7,258    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,760    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,497    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,018    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,515     11,515    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,121     5,121    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 11,515     11,515    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,121     5,121    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 11,515          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,121          
Nashville, TN - The Pinnacle at Symphony Place [Member]            
Real Estate and Accumulated Depreciation [Line Items]            
Real Estate and Accumulated Depreciation, Encumbrances       93,350    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       141,469    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,406    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       147,875    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 147,875     147,875    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 36,904     36,904    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 147,875     147,875    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 36,904     36,904    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 147,875          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 36,904          
Nashville, TN - Seven Springs East (LifePoint) [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,525    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       37,587    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       192    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,525    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       37,779    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 40,304     40,304    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,512     8,512    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 40,304     40,304    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,512     8,512    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 40,304          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 8,512          
Nashville, TN - The Shops at Seven Springs [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       803    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       8,223    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       581    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       803    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,804    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,607     9,607    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,604     2,604    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,607     9,607    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,604     2,604    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 9,607          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,604          
Nashville, TN - Seven Springs West [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,439    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       51,306    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,995    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,439    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       53,301    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 55,740     55,740    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,947     7,947    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 55,740     55,740    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,947     7,947    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 55,740          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 7,947          
Nashville, TN - Seven Springs II [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,356    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       30,048    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,011    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,356    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       33,059    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 35,415     35,415    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,058     4,058    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 35,415     35,415    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,058     4,058    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 35,415          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,058          
Nashville, TN - Bridgestone Tower [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       19,223    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       169,582    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       110    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       19,223    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       169,692    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 188,915     188,915    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 16,369     16,369    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 188,915     188,915    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 16,369     16,369    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 188,915          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 16,369          
Nashville, TN - Virginia Springs II [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       4,821    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       21,578    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       4,821    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       21,578    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 26,399     26,399    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 70     70    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 26,399     26,399    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 70     70    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 26,399          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 70          
Nashville, TN - MARS Campus [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       7,010    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       87,474    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       32    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       7,010    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       87,506    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 94,516     94,516    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,505     5,505    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 94,516     94,516    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,505     5,505    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 94,516          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,505          
Nashville, TN - 5501 Virginia Way [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       4,534    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       25,632    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       274    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       4,534    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       25,906    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 30,440     30,440    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,775     1,775    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 30,440     30,440    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,775     1,775    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 30,440          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 1,775          
Nashville, TN - 1100 Broadway - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       29,845    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       29,845    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 29,845     29,845    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 29,845     29,845    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 29,845          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Nashville, TN - Ovation - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       31,063    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       104    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       31,167    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 31,167     31,167    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 31,167     31,167    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 31,167          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Nashville, TN - Broadway Stem - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       6,218    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       6,218    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,218     6,218    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,218     6,218    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 6,218          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Orlando, FL - Capital Plaza Three - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,994    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       18    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,012    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,012     3,012    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,012     3,012    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 3,012          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Orlando, FL - Eola Park - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,027    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,027    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,027     2,027    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,027     2,027    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 2,027          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
South Florida - The 1800 Eller Drive Building [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       9,851    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,526    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       13,377    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,377     13,377    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,158     9,158    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,377     13,377    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 9,158     9,158    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 13,377          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 9,158          
Orlando - Seaside Plaza [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       3,893    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       29,541    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,104    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,893    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       39,645    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 43,538     43,538    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,963     8,963    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 43,538     43,538    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,963     8,963    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 43,538          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 8,963          
Orlando - Capital Plaza Two [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       4,346    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       43,394    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       8,433    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       4,346    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       51,827    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 56,173     56,173    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,253     12,253    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 56,173     56,173    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,253     12,253    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 56,173          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 12,253          
Orlando - Capital Plaza One [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       3,482    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       27,321    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       7,668    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,482    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       34,989    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 38,471     38,471    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,387     7,387    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 38,471     38,471    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,387     7,387    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 38,471          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 7,387          
Orlando - Landmark Center Two [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       4,743    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       22,031    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       9,352    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       4,743    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       31,383    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 36,126     36,126    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,595     7,595    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 36,126     36,126    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,595     7,595    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 36,126          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 7,595          
Orlando - Landmark Center One [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       6,207    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       22,655    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,026    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       6,207    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       32,681    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 38,888     38,888    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,556     7,556    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 38,888     38,888    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,556     7,556    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 38,888          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 7,556          
Orlando - 300 South Orange [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       3,490    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       56,079    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,243    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,490    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       66,322    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 69,812     69,812    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,867     12,867    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 69,812     69,812    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,867     12,867    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 69,812          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 12,867          
Orlando, FL - Eola Centre [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       3,758    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       11,160    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       12,739    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,758    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       23,899    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 27,657     27,657    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,710     3,710    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 27,657     27,657    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,710     3,710    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 27,657          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,710          
Pittsburgh, PA - One PPG Place [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       9,819    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       107,643    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       51,500    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       9,819    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       159,143    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 168,962     168,962    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 51,382     51,382    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 168,962     168,962    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 51,382     51,382    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 168,962          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 51,382          
Pittsburgh, PA - Two PPG Place [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,302    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       10,978    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,655    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,302    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       21,633    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 23,935     23,935    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,670     5,670    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 23,935     23,935    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,670     5,670    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 23,935          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,670          
Pittsburgh, PA - Three PPG Place [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       501    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       2,923    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,680    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       501    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       7,603    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,104     8,104    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,737     2,737    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,104     8,104    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,737     2,737    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 8,104          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,737          
Pittsburgh, PA - Four PPG Place [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       620    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       3,239    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,675    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       620    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,914    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,534     7,534    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,220     2,220    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,534     7,534    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,220     2,220    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 7,534          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,220          
Pittsburgh, PA - Five PPG Place [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       803    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       4,924    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,168    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       803    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,092    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,895     8,895    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,828     2,828    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,895     8,895    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,828     2,828    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 8,895          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,828          
Pittsburgh, PA - Six PPG Place [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       3,353    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       25,602    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       15,502    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,353    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       41,104    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 44,457     44,457    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 11,416     11,416    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 44,457     44,457    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 11,416     11,416    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 44,457          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 11,416          
Pittsburgh, PA - EQT Plaza [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       16,457    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       83,812    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       15,175    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       16,457    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       98,987    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 115,444     115,444    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 25,863     25,863    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 115,444     115,444    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 25,863     25,863    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 115,444          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 25,863          
Pittsburgh, PA - East Liberty - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,478    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,478    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,478     2,478    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,478     2,478    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 2,478          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Raleigh, NC - 3600 Glenwood Avenue [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       10,994    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,948    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       15,942    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,942     15,942    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,885     8,885    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 15,942     15,942    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,885     8,885    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 15,942          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 8,885          
Raleigh, NC - 3737 Glenwood Avenue [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       318    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       17,281    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       318    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       17,281    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,599     17,599    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,596     8,596    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 17,599     17,599    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,596     8,596    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 17,599          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 8,596          
Raleigh, NC - 4800 North Park [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,678    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       17,630    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,224    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,678    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       27,854    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 30,532     30,532    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 16,546     16,546    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 30,532     30,532    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 16,546     16,546    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 30,532          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 16,546          
Raleigh, NC - 5000 North Park [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,010    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       4,612    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (49)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,674    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       961    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       7,286    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,247     8,247    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,078     4,078    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,247     8,247    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,078     4,078    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 8,247          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,078          
Raleigh, NC - 801 Raleigh Corporate Center [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       828    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       272    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       11,233    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,100    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       11,233    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,333     12,333    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,604     4,604    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,333     12,333    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,604     4,604    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 12,333          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,604          
Raleigh, NC - 2500 Blue Ridge Road [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       722    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       4,606    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,497    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       722    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,103    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,825     6,825    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,844     3,844    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,825     6,825    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,844     3,844    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 6,825          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,844          
Raleigh, NC - 2418 Blue Ridge Road [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       462    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       1,410    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,718    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       462    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,128    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,590     4,590    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,623     1,623    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,590     4,590    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,623     1,623    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 4,590          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 1,623          
Raleigh, NC - Cape Fear [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       131    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       1,630    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (2)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (1,004)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       129    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       626    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 755     755    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 382     382    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 755     755    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 382     382    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 755          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 382          
Raleigh, NC - Catawba [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       125    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       1,635    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (2)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (1,635)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       123    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 123     123    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 123     123    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 123          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Raleigh, NC - 2000 CentreGreen [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,529    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (391)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       12,445    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,138    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,445    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,583     13,583    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,544     4,544    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,583     13,583    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,544     4,544    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 13,583          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,544          
Raleigh, NC - 4000 CentreGreen [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,653    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (389)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       11,339    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,264    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       11,339    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,603     12,603    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,202     5,202    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,603     12,603    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,202     5,202    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 12,603          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,202          
Raleigh, NC - 5000 CentreGreen [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,291    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       34,572    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,875    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,291    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       37,447    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 38,738     38,738    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,997     4,997    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 38,738     38,738    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,997     4,997    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 38,738          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,997          
Raleigh, NC - 3000 CentreGreen [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,779    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (397)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       14,505    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,382    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       14,505    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,887     15,887    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,860     4,860    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 15,887     15,887    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,860     4,860    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 15,887          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,860          
Raleigh, NC - 1000 CentreGreen [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,280    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       55    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       12,888    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,335    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,888    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,223     14,223    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,736     3,736    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,223     14,223    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,736     3,736    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 14,223          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,736          
Raleigh, NC - Cottonwood [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       609    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       3,244    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       437    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       609    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,681    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,290     4,290    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,435     2,435    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,290     4,290    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,435     2,435    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 4,290          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,435          
Raleigh, NC - GlenLake - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       13,003    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (9,924)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       114    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,079    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       114    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,193     3,193    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 56     56    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,193     3,193    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 56     56    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 3,193          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 56          
Raleigh, NC - GlenLake One [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       924    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       1,324    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       22,714    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,248    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       22,714    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 24,962     24,962    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,176     10,176    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 24,962     24,962    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,176     10,176    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 24,962          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 10,176          
Raleigh, NC - GlenLake Four [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,659    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       493    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       20,311    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,152    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       20,311    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 22,463     22,463    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,243     7,243    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 22,463     22,463    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,243     7,243    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 22,463          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 7,243          
Raleigh, NC - GlenLake Six [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       941    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (365)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       20,118    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       576    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       20,118    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 20,694     20,694    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,532     6,532    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 20,694     20,694    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,532     6,532    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 20,694          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 6,532          
Raleigh, NC - 701 Raleigh Corporate Center [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,304    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       540    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       17,337    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,844    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       17,337    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 19,181     19,181    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,802     8,802    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 19,181     19,181    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,802     8,802    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 19,181          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 8,802          
Raleigh, NC - Highwoods Centre [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       531    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (267)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       7,981    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       264    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       7,981    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,245     8,245    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,290     4,290    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,245     8,245    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,290     4,290    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 8,245          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,290          
Raleigh, NC - Inveresk Parcel 2 - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       657    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       38    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       103    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       695    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       103    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 798     798    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14     14    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 798     798    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14     14    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 798          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 14          
Raleigh, NC - 4201 Lake Boone Trail [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,450    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       6,311    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       684    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,450    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,995    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,445     8,445    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,998     1,998    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,445     8,445    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,998     1,998    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 8,445          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 1,998          
Raleigh, NC - 4620 Creekstone Drive [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       149    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       107    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,380    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       256    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,380    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,636     3,636    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,511     1,511    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,636     3,636    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,511     1,511    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 3,636          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 1,511          
Raleigh, NC - 4825 Creekstone Drive [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       398    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       293    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,478    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       691    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,478    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,169     11,169    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,269     5,269    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 11,169     11,169    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,269     5,269    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 11,169          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,269          
Raleigh, NC - Pamlico [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       289    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       9,188    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       289    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,188    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,477     9,477    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,209     7,209    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,477     9,477    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,209     7,209    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 9,477          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 7,209          
Raleigh, NC - 751 Corporate Center [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,665    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       16,939    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,665    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       16,939    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 19,604     19,604    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,817     1,817    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 19,604     19,604    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,817     1,817    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 19,604          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 1,817          
Raleigh, NC - PNC Plaza [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,206    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       70,389    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,206    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       70,389    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 71,595     71,595    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 24,643     24,643    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 71,595     71,595    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 24,643     24,643    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 71,595          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 24,643          
Raleigh, NC - 4301 Lake Boone Trail [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       878    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       3,730    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,405    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       878    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,135    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,013     7,013    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,896     3,896    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,013     7,013    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,896     3,896    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 7,013          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,896          
Raleigh, NC - 4207 Lake Boone Trail [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       362    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       1,818    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,407    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       362    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,225    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,587     3,587    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,130     2,130    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,587     3,587    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,130     2,130    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 3,587          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,130          
Raleigh, NC - 2301 Rexwoods Drive [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       919    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       2,816    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,650    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       919    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,466    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,385     5,385    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,769     2,769    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,385     5,385    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,769     2,769    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 5,385          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,769          
Raleigh, NC - 4325 Lake Boone Trail [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       586    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,872    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       586    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,872    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,458     5,458    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,764     2,764    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,458     5,458    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,764     2,764    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 5,458          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,764          
Raleigh, NC - 2300 Rexwoods Drive [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,301    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       184    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       8,129    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,485    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,129    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,614     9,614    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,938     2,938    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,614     9,614    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,938     2,938    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 9,614          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,938          
Raleigh, NC - 4709 Creekstone Drive [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       469    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       4,038    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       23    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,383    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       492    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,421    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,913     9,913    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,081     3,081    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,913     9,913    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,081     3,081    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 9,913          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,081          
Raleigh, NC - 4700 Six Forks Road [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       666    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       2,665    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,180    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       666    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,845    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,511     4,511    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,356     2,356    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,511     4,511    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,356     2,356    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 4,511          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,356          
Raleigh, NC - 4700 Homewood Court [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,086    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       4,533    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,078    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,086    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,611    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,697     7,697    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,925     3,925    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,697     7,697    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,925     3,925    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 7,697          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,925          
Raleigh, NC - 4800 Six Forks Road [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       862    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       4,411    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,433    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       862    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       7,844    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,706     8,706    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,401     4,401    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,706     8,706    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,401     4,401    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 8,706          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,401          
Raleigh, NC - Smoketree Tower [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,353    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       11,743    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,818    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,353    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       18,561    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 20,914     20,914    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,951     10,951    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 20,914     20,914    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,951     10,951    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 20,914          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 10,951          
Raleigh, NC - 4601 Creekstone Drive [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       255    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       217    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,221    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       472    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,221    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,693     6,693    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,545     3,545    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,693     6,693    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,545     3,545    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 6,693          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,545          
Raleigh, NC - Weston - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       22,771    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (19,894)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,877    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,877     2,877    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,877     2,877    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 2,877          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Raleigh, NC - 4625 Creekstone Drive [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       458    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       268    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,122    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       726    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,122    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,848     6,848    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,621     3,621    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,848     6,848    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,621     3,621    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 6,848          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,621          
Raleigh, NC - 11000 Weston Parkway [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,651    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       18,850    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       15,357    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,651    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       34,207    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 36,858     36,858    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,014     6,014    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 36,858     36,858    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,014     6,014    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 36,858          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 6,014          
Raleigh, NC - GlenLake Five [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,263    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       30,264    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,693    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,263    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       33,957    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 36,220     36,220    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,605     8,605    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 36,220     36,220    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,605     8,605    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 36,220          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 8,605          
Raleigh, NC - 11800 Weston Parkway [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       826    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       13,188    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       13    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       826    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       13,201    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,027     14,027    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,836     2,836    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,027     14,027    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,836     2,836    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 14,027          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,836          
Raleigh, NC - CentreGreen Cafe [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       41    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       3,509    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (2)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       41    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,507    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,548     3,548    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 533     533    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,548     3,548    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 533     533    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 3,548          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 533          
Raleigh, NC - CentreGreen Fitness Center [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       27    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       2,322    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (1)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       27    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,321    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,348     2,348    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 353     353    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,348     2,348    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 353     353    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 2,348          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 353          
Raleigh, NC - One City Plaza [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       11,288    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       68,375    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       26,766    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       11,288    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       95,141    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 106,429     106,429    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 20,423     20,423    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 106,429     106,429    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 20,423     20,423    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 106,429          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 20,423          
Raleigh, NC - Edison - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       5,984    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       2,196    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       8,180    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,180     8,180    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,180     8,180    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 8,180          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Raleigh, NC - Charter Square [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       7,267    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       65,881    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,913    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       7,267    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       70,794    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 78,061     78,061    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,208     10,208    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 78,061     78,061    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,208     10,208    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 78,061          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 10,208          
Raleigh, NC - Metlife Global Technology Campus [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       21,580    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       149,889    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (153)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       21,580    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       149,736    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 171,316     171,316    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 19,477     19,477    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 171,316     171,316    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 19,477     19,477    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 171,316          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 19,477          
Raleigh, NC - GlenLake Seven [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       1,662    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       34,077    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,662    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       34,077    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 35,739     35,739    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 435     435    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 35,739     35,739    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 435     435    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 35,739          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 435          
Raleigh, NC - Hargett - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       6,582    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       2,816    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       9,398    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,398     9,398    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,398     9,398    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 9,398          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Raleigh, NC - Other Property [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       27,260    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       20,868    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (6,084)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       96,118    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       21,176    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       116,986    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 138,162     138,162    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 50,227     50,227    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 138,162     138,162    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 50,227     50,227    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 138,162          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 50,227          
Richmond, VA - 4900 Cox Road [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,324    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       5,311    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       15    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,731    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,339    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,042    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,381     10,381    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,460     5,460    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,381     10,381    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,460     5,460    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 10,381          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,460          
Richmond, VA - Colonnade Building [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,364    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       6,105    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,462    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,364    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,567    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,931     9,931    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,885     3,885    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,931     9,931    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,885     3,885    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 9,931          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,885          
Richmond, VA - Dominion Place - Pitts Parcel - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,101    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (404)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       697    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 697     697    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 697     697    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 697          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Richmond, VA - Markel 4521 [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,581    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       13,299    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       168    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (396)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,749    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,903    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,652     14,652    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,260     6,260    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,652     14,652    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,260     6,260    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 14,652          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 6,260          
Richmond, VA - Hamilton Beach [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,086    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       4,345    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       10    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,997    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,096    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       7,342    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,438     8,438    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,849     3,849    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,438     8,438    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,849     3,849    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 8,438          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,849          
Richmond, VA - Highwoods Commons [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       521    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       458    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,651    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       979    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,651    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,630     5,630    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,261     2,261    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,630     5,630    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,261     2,261    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 5,630          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,261          
Richmond, VA - Highwoods One [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,688    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       22    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       14,116    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,710    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       14,116    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,826     15,826    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,416     7,416    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 15,826     15,826    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,416     7,416    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 15,826          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 7,416          
Richmond, VA - Highwoods Two [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       786    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       226    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,292    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,012    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,292    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,304     11,304    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,936     3,936    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 11,304     11,304    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,936     3,936    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 11,304          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,936          
Richmond, VA - Highwoods Five [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       783    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       11    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       8,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       794    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,794     8,794    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,744     3,744    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,794     8,794    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,744     3,744    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 8,794          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,744          
Richmond, VA - Highwoods Plaza [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       909    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       187    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,897    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,096    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,897    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,993     6,993    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,865     2,865    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,993     6,993    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,865     2,865    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 6,993          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,865          
Richmond, VA - Innslake Center [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       845    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       195    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       8,023    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,040    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,023    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,063     9,063    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,527     3,527    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,063     9,063    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,527     3,527    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 9,063          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,527          
Richmond, VA - Highwoods Centre [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,205    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       4,825    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,967    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,205    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,792    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,997     7,997    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,505     3,505    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,997     7,997    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,505     3,505    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 7,997          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,505          
Richmond, VA - Markel 4501 [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,300    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       13,259    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       213    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (3,367)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,513    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,892    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,405     11,405    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,039     4,039    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 11,405     11,405    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,039     4,039    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 11,405          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,039          
Richmond, VA - 4600 Cox Road [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,700    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       17,081    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       169    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (3,450)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,869    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       13,631    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,500     15,500    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,576     5,576    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 15,500     15,500    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,576     5,576    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 15,500          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,576          
Richmond, VA - North Park [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,163    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       8,659    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       6    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,666    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,169    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,325    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,494     14,494    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,976     6,976    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,494     14,494    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,976     6,976    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 14,494          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 6,976          
Richmond, VA - North Shore Commons I [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       951    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       137    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       12,624    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,088    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,624    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,712     13,712    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,525     6,525    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,712     13,712    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,525     6,525    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 13,712          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 6,525          
Richmond, VA - North Shore Commons II [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,067    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (89)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,848    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,978    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,848    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,826     12,826    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,873     3,873    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,826     12,826    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,873     3,873    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 12,826          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,873          
Richmond, VA - North Shore Commons C - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,497    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       55    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,552    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,562     1,562    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1     1    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,562     1,562    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1     1    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 1,562          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 1          
Richmond, VA - North Shore Commons D - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,261    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,261    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,261     1,261    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,261     1,261    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 1,261          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Richmond, VA - Nuckols Corner - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,259    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       231    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,490    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,490     1,490    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,490     1,490    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 1,490          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Richmond, VA - One Shockoe Plaza [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       356    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       21,530    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       356    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       21,530    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 21,886     21,886    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,372     10,372    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 21,886     21,886    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,372     10,372    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 21,886          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 10,372          
Richmond, VA - Pavilion - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       181    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       46    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (181)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (46)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 0     0    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 0          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Richmond, VA - Lake Brook Commons [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,600    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       8,864    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       21    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,877    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,621    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       11,741    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,362     13,362    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,503     5,503    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,362     13,362    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,503     5,503    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 13,362          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,503          
Richmond, VA - Sadler & Cox - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,535    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       343    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,878    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,878     1,878    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,878     1,878    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 1,878          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Richmond, VA - Highwoods Three [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,918    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       358    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       12,128    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,276    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,128    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,404     14,404    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,345     4,345    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,404     14,404    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,345     4,345    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 14,404          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,345          
Richmond, VA - Stony Point VI (Virginia Urology) [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,925    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       25,868    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (2)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,925    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       25,866    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 27,791     27,791    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,059     2,059    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 27,791     27,791    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,059     2,059    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 27,791          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,059          
Richmond, VA - Stony Point I [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,384    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       11,630    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (267)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,115    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,117    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       15,745    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,862     16,862    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,432     8,432    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 16,862     16,862    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,432     8,432    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 16,862          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 8,432          
Richmond, VA - Stony Point II [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,240    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       103    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       13,296    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,343    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       13,296    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,639     14,639    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,534     6,534    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,639     14,639    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,534     6,534    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 14,639          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 6,534          
Richmond, VA - Stony Point III [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       995    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,762    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       995    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,762    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,757     11,757    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,361     5,361    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 11,757     11,757    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,361     5,361    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 11,757          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,361          
Richmond, VA - Stony Point IV [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       955    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       12,057    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       955    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,057    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,012     13,012    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,467     4,467    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,012     13,012    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,467     4,467    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 13,012          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,467          
Richmond, VA - Virginia Mutual [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,301    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       6,036    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       15    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,201    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,316    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       7,237    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,553     8,553    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,639     3,639    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,553     8,553    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,639     3,639    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 8,553          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,639          
Richmond, VA - Waterfront Plaza [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       585    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       2,347    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       8    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,291    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       593    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,638    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,231     5,231    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,157     2,157    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,231     5,231    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,157     2,157    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 5,231          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,157          
Richmond, VA - Innsbrook Centre [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       914    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       8,249    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,126    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       914    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,375    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,289     10,289    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,093     4,093    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,289     10,289    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,093     4,093    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 10,289          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,093          
Richmond, VA - Elks Pass - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       3,326    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,326    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,326     3,326    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,326     3,326    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 3,326          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Tampa, FL - Meridian Three [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,673    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       16,470    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,930    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,673    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       22,400    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 25,073     25,073    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,048     7,048    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 25,073     25,073    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,048     7,048    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 25,073          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 7,048          
Tampa, FL - Bayshore Place [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,276    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       11,817    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,632    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,276    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       15,449    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,725     17,725    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,269     7,269    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 17,725     17,725    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,269     7,269    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 17,725          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 7,269          
Tampa, FL - 5525 Gray Street [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       4,054    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       406    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       23,977    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       4,460    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       23,977    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 28,437     28,437    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,606     8,606    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 28,437     28,437    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 8,606     8,606    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 28,437          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 8,606          
Tampa, FL - Highwoods Preserve Building V [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       881    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       25,368    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       881    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       25,368    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 26,249     26,249    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 11,031     11,031    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 26,249     26,249    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 11,031     11,031    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 26,249          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 11,031          
Tampa, FL - Highwoods Bay Center I [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       3,565    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (64)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       38,263    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,501    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       38,263    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 41,764     41,764    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,745     12,745    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 41,764     41,764    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,745     12,745    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 41,764          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 12,745          
Tampa, FL - HIW Bay Center II - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       3,482    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,482    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,482     3,482    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,482     3,482    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 3,482          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Tampa, FL - HIW Preserve Building VII [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       790    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       16,996    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       790    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       16,996    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,786     17,786    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,481     4,481    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 17,786     17,786    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 4,481     4,481    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 17,786          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 4,481          
Tampa, FL - HIW Preserve VII Garage [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,932    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,932    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,932     6,932    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,367     2,367    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,932     6,932    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,367     2,367    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 6,932          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,367          
Tampa, FL - Horizon [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       6,257    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,443    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,700    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,700     10,700    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,546     5,546    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,700     10,700    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,546     5,546    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 10,700          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,546          
Tampa, FL - LakePointe One [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,106    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       89    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       41,475    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,106    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       41,564    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 43,670     43,670    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 23,659     23,659    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 43,670     43,670    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 23,659     23,659    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 43,670          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 23,659          
Tampa, FL - LakePointe Two [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,000    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       15,848    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       672    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       15,211    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,672    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       31,059    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 33,731     33,731    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 15,976     15,976    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 33,731     33,731    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 15,976     15,976    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 33,731          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 15,976          
Tampa, FL - Lakeside [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       7,369    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       7,726    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       15,095    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,095     15,095    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,504     7,504    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 15,095     15,095    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 7,504     7,504    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 15,095          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 7,504          
Tampa, FL - Lakeside/Parkside Garage [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,732    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,732    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,732     5,732    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,455     2,455    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,732     5,732    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 2,455     2,455    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 5,732          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 2,455          
Tampa, FL - One Harbour Place [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,016    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       25,252    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       16,693    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,016    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       41,945    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 43,961     43,961    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 18,333     18,333    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 43,961     43,961    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 18,333     18,333    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 43,961          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 18,333          
Tampa, FL - Parkside [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       9,407    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,231    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,638    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,638     12,638    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,111     6,111    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,638     12,638    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,111     6,111    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 12,638          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 6,111          
Tampa, FL - Pavilion [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       16,394    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,071    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       22,465    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 22,465     22,465    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,081     12,081    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 22,465     22,465    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 12,081     12,081    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 22,465          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 12,081          
Tampa, FL - Pavilion Parking Garage [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,801    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,801    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,801     5,801    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,038     3,038    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,801     5,801    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,038     3,038    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 5,801          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,038          
Tampa, FL - Spectrum [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,454    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       14,502    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,751    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,454    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       19,253    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 20,707     20,707    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,099     10,099    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 20,707     20,707    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 10,099     10,099    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 20,707          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 10,099          
Tampa, FL - Tower Place [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       3,218    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       19,898    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,948    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,218    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       26,846    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 30,064     30,064    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14,011     14,011    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 30,064     30,064    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 14,011     14,011    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 30,064          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 14,011          
Tampa, FL - Westshore Square [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,126    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       5,186    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,706    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,126    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,892    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,018     8,018    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,687     3,687    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,018     8,018    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,687     3,687    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 8,018          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,687          
Tampa, FL - Independence Park - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       4,943    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       5,058    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,227    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       10,001    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,227    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,228     12,228    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 214     214    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,228     12,228    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 214     214    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 12,228          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 214          
Tampa, FL - Independence One [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,531    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       4,526    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,741    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,531    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,267    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,798     12,798    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,104     5,104    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,798     12,798    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 5,104     5,104    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 12,798          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 5,104          
Tampa, FL - Meridian One [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,849    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       22,363    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,187    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,849    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       25,550    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 27,399     27,399    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,028     6,028    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 27,399     27,399    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,028     6,028    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 27,399          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 6,028          
Tampa, FL - Meridian Two [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,302    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       19,588    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,425    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,302    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       25,013    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 26,315     26,315    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,064     6,064    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 26,315     26,315    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 6,064     6,064    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 26,315          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 6,064          
Tampa, FL - 5332 Avion Drive [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       6,310    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       39,358    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       6,310    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       39,358    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 45,668     45,668    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,937     3,937    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 45,668     45,668    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 3,937     3,937    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 45,668          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 3,937          
Tampa, FL - Suntrust Financial Centre [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       1,980    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       102,138    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       25,020    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,980    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       127,158    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 129,138     129,138    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 20,758     20,758    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 129,138     129,138    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 20,758     20,758    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 129,138          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 20,758          
Tampa, FL - Suntrust Financial - Land [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       2,225    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,225    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,225     2,225    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,225     2,225    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 0     0    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 2,225          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Total Real Estate and Accumulated Depreciation [Member]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land       606,086    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements       3,274,841    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (5,128)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,719,034    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       600,958    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,993,875    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,594,833     5,594,833    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,421,956     1,421,956    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,594,833     5,594,833    
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation 1,421,956     $ 1,421,956    
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]            
Real estate assets, ending balance 5,594,833          
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,421,956          
Minimum [Member] | Atlanta, GA - 1700 Century Circle [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - 1800 Century Boulevard [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - 1825 Century Boulevard [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - 1875 Century Boulevard [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - 1900 Century Boulevard [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - 2200 Century Parkway [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - 2400 Century Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - 2500 Century Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - 2500/2635 Parking Garage [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - 2600 Century Parkway [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - 2635 Century Parkway [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - 2800 Century Parkway [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - 50 Glenlake [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - Century Plaza I [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - Century Plaza II [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - 5405 Windward Parkway [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - Riverpoint - Land [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - Riverwood 100 [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - Two Alliance Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - One Alliance Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - 10 Glenlake North [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - 10 Glenlake South [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - Riverwood 200 [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - Riverwood 300 - Land [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - Monarch Tower [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Atlanta, GA - Monarch Plaza [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Charlotte, NC - Bank of America Tower [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - 3322 West End [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - 3401 West End [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - 5310 Maryland Way [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Cool Springs I & II Deck [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Cool Springs III & IV Deck [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Cool Springs I [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Cool Springs II [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Cool Springs III [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Cool Springs IV [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Cool Springs V (Healthways) [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Harpeth on the Green II [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Harpeth on the Green III [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Harpeth on the Green IV [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Harpeth on The Green V [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Hickory Trace [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Highwoods Plaza I [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Highwoods Plaza II [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Seven Springs I [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - SouthPointe [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Ramparts [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Westwood South [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - 100 Winners Circle [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - The Pinnacle at Symphony Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Seven Springs East (LifePoint) [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - The Shops at Seven Springs [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Seven Springs West [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Seven Springs II [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Bridgestone Tower [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - Virginia Springs II [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - MARS Campus [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Nashville, TN - 5501 Virginia Way [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | South Florida - The 1800 Eller Drive Building [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Orlando - Seaside Plaza [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Orlando - Capital Plaza Two [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Orlando - Capital Plaza One [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Orlando - Landmark Center Two [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Orlando - Landmark Center One [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Orlando - 300 South Orange [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Orlando, FL - Eola Centre [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Pittsburgh, PA - One PPG Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Pittsburgh, PA - Two PPG Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Pittsburgh, PA - Three PPG Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Pittsburgh, PA - Four PPG Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Pittsburgh, PA - Five PPG Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Pittsburgh, PA - Six PPG Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Pittsburgh, PA - EQT Plaza [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 3600 Glenwood Avenue [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 3737 Glenwood Avenue [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 4800 North Park [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 5000 North Park [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 801 Raleigh Corporate Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 2500 Blue Ridge Road [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 2418 Blue Ridge Road [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - Cape Fear [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - Catawba [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 2000 CentreGreen [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 4000 CentreGreen [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 5000 CentreGreen [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 3000 CentreGreen [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 1000 CentreGreen [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - Cottonwood [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - GlenLake - Land [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - GlenLake One [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - GlenLake Four [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - GlenLake Six [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 701 Raleigh Corporate Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - Highwoods Centre [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - Inveresk Parcel 2 - Land [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 4201 Lake Boone Trail [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 4620 Creekstone Drive [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 4825 Creekstone Drive [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - Pamlico [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 751 Corporate Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - PNC Plaza [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 4301 Lake Boone Trail [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 4207 Lake Boone Trail [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 2301 Rexwoods Drive [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 4325 Lake Boone Trail [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 2300 Rexwoods Drive [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 4709 Creekstone Drive [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 4700 Six Forks Road [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 4700 Homewood Court [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 4800 Six Forks Road [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - Smoketree Tower [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 4601 Creekstone Drive [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 4625 Creekstone Drive [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 11000 Weston Parkway [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - GlenLake Five [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - 11800 Weston Parkway [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - CentreGreen Cafe [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - CentreGreen Fitness Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - One City Plaza [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - Charter Square [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - Metlife Global Technology Campus [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - GlenLake Seven [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Raleigh, NC - Other Property [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - 4900 Cox Road [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Colonnade Building [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Markel 4521 [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Hamilton Beach [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Highwoods Commons [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Highwoods One [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Highwoods Two [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Highwoods Five [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Highwoods Plaza [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Innslake Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Highwoods Centre [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Markel 4501 [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - 4600 Cox Road [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - North Park [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - North Shore Commons I [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - North Shore Commons II [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - One Shockoe Plaza [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Lake Brook Commons [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Highwoods Three [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Stony Point VI (Virginia Urology) [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Stony Point I [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Stony Point II [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Stony Point III [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Stony Point IV [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Virginia Mutual [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Waterfront Plaza [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Richmond, VA - Innsbrook Centre [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Meridian Three [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Bayshore Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - 5525 Gray Street [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Highwoods Preserve Building V [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Highwoods Bay Center I [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - HIW Preserve Building VII [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - HIW Preserve VII Garage [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Horizon [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - LakePointe One [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - LakePointe Two [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Lakeside [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Lakeside/Parkside Garage [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - One Harbour Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Parkside [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Pavilion [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Pavilion Parking Garage [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Spectrum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Tower Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Westshore Square [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Independence Park - Land [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Independence One [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Meridian One [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Meridian Two [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - 5332 Avion Drive [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Minimum [Member] | Tampa, FL - Suntrust Financial Centre [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Maximum [Member] | Atlanta, GA - 1700 Century Circle [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - 1800 Century Boulevard [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - 1825 Century Boulevard [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - 1875 Century Boulevard [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - 1900 Century Boulevard [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - 2200 Century Parkway [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - 2400 Century Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - 2500 Century Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - 2500/2635 Parking Garage [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - 2600 Century Parkway [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - 2635 Century Parkway [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - 2800 Century Parkway [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - 50 Glenlake [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - Century Plaza I [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - Century Plaza II [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - 5405 Windward Parkway [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - Riverpoint - Land [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - Riverwood 100 [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - Two Alliance Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - One Alliance Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - 10 Glenlake North [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - 10 Glenlake South [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - Riverwood 200 [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - Riverwood 300 - Land [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - Monarch Tower [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Atlanta, GA - Monarch Plaza [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Charlotte, NC - Bank of America Tower [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - 3322 West End [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - 3401 West End [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - 5310 Maryland Way [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Cool Springs I & II Deck [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Cool Springs III & IV Deck [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Cool Springs I [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Cool Springs II [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Cool Springs III [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Cool Springs IV [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Cool Springs V (Healthways) [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Harpeth on the Green II [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Harpeth on the Green III [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Harpeth on the Green IV [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Harpeth on The Green V [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Hickory Trace [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Highwoods Plaza I [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Highwoods Plaza II [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Seven Springs I [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - SouthPointe [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Ramparts [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Westwood South [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - 100 Winners Circle [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - The Pinnacle at Symphony Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Seven Springs East (LifePoint) [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - The Shops at Seven Springs [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Seven Springs West [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Seven Springs II [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Bridgestone Tower [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - Virginia Springs II [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - MARS Campus [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Nashville, TN - 5501 Virginia Way [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | South Florida - The 1800 Eller Drive Building [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Orlando - Seaside Plaza [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Orlando - Capital Plaza Two [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Orlando - Capital Plaza One [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Orlando - Landmark Center Two [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Orlando - Landmark Center One [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Orlando - 300 South Orange [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Orlando, FL - Eola Centre [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Pittsburgh, PA - One PPG Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Pittsburgh, PA - Two PPG Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Pittsburgh, PA - Three PPG Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Pittsburgh, PA - Four PPG Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Pittsburgh, PA - Five PPG Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Pittsburgh, PA - Six PPG Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Pittsburgh, PA - EQT Plaza [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 3600 Glenwood Avenue [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 3737 Glenwood Avenue [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 4800 North Park [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 5000 North Park [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 801 Raleigh Corporate Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 2500 Blue Ridge Road [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 2418 Blue Ridge Road [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - Cape Fear [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - Catawba [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 2000 CentreGreen [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 4000 CentreGreen [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 5000 CentreGreen [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 3000 CentreGreen [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 1000 CentreGreen [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - Cottonwood [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - GlenLake - Land [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - GlenLake One [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - GlenLake Four [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - GlenLake Six [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 701 Raleigh Corporate Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - Highwoods Centre [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - Inveresk Parcel 2 - Land [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 4201 Lake Boone Trail [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 4620 Creekstone Drive [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 4825 Creekstone Drive [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - Pamlico [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 751 Corporate Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - PNC Plaza [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 4301 Lake Boone Trail [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 4207 Lake Boone Trail [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 2301 Rexwoods Drive [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 4325 Lake Boone Trail [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 2300 Rexwoods Drive [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 4709 Creekstone Drive [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 4700 Six Forks Road [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 4700 Homewood Court [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 4800 Six Forks Road [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - Smoketree Tower [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 4601 Creekstone Drive [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 4625 Creekstone Drive [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 11000 Weston Parkway [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - GlenLake Five [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - 11800 Weston Parkway [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - CentreGreen Cafe [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - CentreGreen Fitness Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - One City Plaza [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - Charter Square [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - Metlife Global Technology Campus [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - GlenLake Seven [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Raleigh, NC - Other Property [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - 4900 Cox Road [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Colonnade Building [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Markel 4521 [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Hamilton Beach [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Highwoods Commons [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Highwoods One [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Highwoods Two [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Highwoods Five [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Highwoods Plaza [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Innslake Center [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Highwoods Centre [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Markel 4501 [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - 4600 Cox Road [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - North Park [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - North Shore Commons I [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - North Shore Commons II [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - One Shockoe Plaza [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Lake Brook Commons [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Highwoods Three [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Stony Point VI (Virginia Urology) [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Stony Point I [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Stony Point II [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Stony Point III [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Stony Point IV [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Virginia Mutual [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Waterfront Plaza [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Richmond, VA - Innsbrook Centre [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Meridian Three [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Bayshore Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - 5525 Gray Street [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Highwoods Preserve Building V [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Highwoods Bay Center I [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - HIW Preserve Building VII [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - HIW Preserve VII Garage [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Horizon [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - LakePointe One [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - LakePointe Two [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Lakeside [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Lakeside/Parkside Garage [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - One Harbour Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Parkside [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Pavilion [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Pavilion Parking Garage [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Spectrum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Tower Place [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Westshore Square [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Independence Park - Land [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Independence One [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Meridian One [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Meridian Two [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - 5332 Avion Drive [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Maximum [Member] | Tampa, FL - Suntrust Financial Centre [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years