OFFICE PROPERTIES INCOME TRUST, 10-K filed on 2/15/2024
Annual Report
v3.24.0.1
Cover Page - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Feb. 14, 2024
Jun. 30, 2023
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 1-34364    
Entity Registrant Name OFFICE PROPERTIES INCOME TRUST    
Entity Incorporation, State or Country Code MD    
Entity Tax Identification Number 26-4273474    
Entity Address, Address Line One Two Newton Place    
Entity Address, Address Line Two 255 Washington Street    
Entity Address, Address Line Three Suite 300    
Entity Address, City or Town Newton    
Entity Address, State or Province MA    
Entity Address, Postal Zip Code 02458-1634    
City Area Code 617    
Local Phone Number 219-1440    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 366.6
Entity Common Stock, Shares Outstanding   48,754,546  
Documents Incorporated by Reference
Certain information required by Items 10, 11, 12, 13 and 14 of Part III of this Annual Report on Form 10-K is incorporated by reference to our definitive Proxy Statement for the 2024 Annual Meeting of Shareholders, to be filed with the Securities and Exchange Commission within 120 days after the fiscal year ended December 31, 2023.
   
Entity Central Index Key 0001456772    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false    
Common Shares      
Document Information [Line Items]      
Title of 12(b) Security Common Shares of Beneficial Interest    
Trading Symbol OPI    
Security Exchange Name NASDAQ    
6.375% Senior Notes Due 2050      
Document Information [Line Items]      
Title of 12(b) Security 6.375% Senior Notes due 2050    
Trading Symbol OPINL    
Security Exchange Name NASDAQ    
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Audit Information
12 Months Ended
Dec. 31, 2023
Auditor Information [Abstract]  
Auditor Name Deloitte & Touche LLP
Auditor Location Boston, Massachusetts
Auditor Firm ID 34
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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Real estate properties:    
Land $ 786,310 $ 821,238
Buildings and improvements 3,279,369 3,114,836
Total real estate properties, gross 4,065,679 3,936,074
Accumulated depreciation (650,179) (561,458)
Total real estate properties, net 3,415,500 3,374,616
Assets of properties held for sale 37,310 2,516
Investments in unconsolidated joint ventures 18,128 35,129
Acquired real estate leases, net 263,498 369,333
Cash and cash equivalents 12,315 12,249
Restricted cash 14,399 0
Rents receivable 133,264 105,639
Deferred leasing costs, net 86,971 73,098
Other assets, net 8,284 7,397
Total assets 3,989,669 3,979,977
LIABILITIES AND SHAREHOLDERS’ EQUITY    
Unsecured revolving credit facility 205,000 195,000
Senior unsecured notes, net 2,195,478 2,187,875
Mortgage notes payable, net 172,131 49,917
Liabilities of properties held for sale 2,525 73
Accounts payable and other liabilities 140,166 140,151
Due to related persons 7,025 6,469
Assumed real estate lease obligations, net 11,665 14,157
Total liabilities 2,733,990 2,593,642
Commitments and contingencies
Shareholders’ equity:    
Common shares of beneficial interest, $.01 par value: 200,000,000 shares authorized, 48,755,415 and 48,565,644 shares issued and outstanding, respectively 488 486
Additional paid in capital 2,621,493 2,619,532
Cumulative net income 100,174 169,606
Cumulative common distributions (1,466,476) (1,403,289)
Total shareholders’ equity 1,255,679 1,386,335
Total liabilities and shareholders’ equity $ 3,989,669 $ 3,979,977
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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Dec. 31, 2023
Dec. 31, 2022
Statement of Financial Position [Abstract]    
Common shares of beneficial interest, par value (in dollars per share) $ 0.01 $ 0.01
Common shares of beneficial interest, shares authorized (in shares) 200,000,000 200,000,000
Common shares of beneficial interest, shares issued (in shares) 48,755,415 48,565,644
Common shares of beneficial interest, shares outstanding (in shares) 48,755,415 48,565,644
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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($)
shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Statement [Abstract]      
Rental income  $ 533,553 $ 554,275 $ 576,482
Expenses:      
Real estate taxes 62,831 57,844 71,970
Utility expenses 26,778 27,005 25,251
Other operating expenses 109,883 110,366 105,825
Depreciation and amortization 209,254 222,564 241,494
Loss on impairment of real estate 11,299 21,820 62,420
Acquisition and transaction related costs 31,816 292 0
General and administrative 22,731 25,134 26,858
Total expenses 474,592 465,025 533,818
Gain on sale of real estate 3,780 11,001 78,354
Interest and other income 1,039 217 7
Interest expense (including net amortization of debt premiums, discounts and issuance costs of $9,209, $9,134 and $9,771, respectively) (110,647) (103,480) (112,385)
Gain (loss) on early extinguishment of debt 0 682 (14,068)
Loss before income tax expense and equity in net losses of investees (46,867) (2,330) (5,428)
Income tax expense (351) (270) (251)
Equity in net losses of investees (3,031) (3,509) (2,501)
Loss on impairment of equity method investment (19,183) 0 0
Net loss $ (69,432) $ (6,109) $ (8,180)
Weighted average common shares outstanding (basic) (in shares) 48,389 48,278 48,195
Weighted average common shares outstanding (diluted) (in shares) 48,389 48,278 48,195
Per common share amounts (basic and diluted):      
Net loss (basic) (in dollars per share) $ (1.44) $ (0.14) $ (0.17)
Net loss (diluted) (in dollars per share) $ (1.44) $ (0.14) $ (0.17)
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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Statement [Abstract]      
Net amortization of debt premiums, discounts and issuance costs $ 9,209 $ 9,134 $ 9,771
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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Shares
Additional Paid In Capital
Cumulative Net Income
Cumulative Common Distributions
Balance beginning (in shares) at Dec. 31, 2020   48,318,366      
Balance beginning at Dec. 31, 2020 $ 1,609,392 $ 483 $ 2,615,305 $ 183,895 $ (1,190,291)
Increase (Decrease) in Shareholders' Equity          
Common share grants (in shares)   145,800      
Common share grants 2,873 $ 1 2,872    
Common share forfeitures and repurchases (in shares)   (38,501)      
Common share forfeitures and repurchases (1,008)   (1,008)    
Net loss (8,180)     (8,180)  
Distributions to common shareholders (106,368)       (106,368)
Balance ending (in shares) at Dec. 31, 2021   48,425,665      
Balance ending at Dec. 31, 2021 1,496,709 $ 484 2,617,169 175,715 (1,296,659)
Increase (Decrease) in Shareholders' Equity          
Common share grants (in shares)   172,700      
Common share grants 2,916 $ 2 2,914    
Common share forfeitures and repurchases (in shares)   (32,721)      
Common share forfeitures and repurchases (551)   (551)    
Net loss (6,109)     (6,109)  
Distributions to common shareholders (106,630)       (106,630)
Balance ending (in shares) at Dec. 31, 2022   48,565,644      
Balance ending at Dec. 31, 2022 1,386,335 $ 486 2,619,532 169,606 (1,403,289)
Increase (Decrease) in Shareholders' Equity          
Common share grants (in shares)   241,800      
Common share grants 2,268 $ 2 2,266    
Common share forfeitures and repurchases (in shares)   (52,029)      
Common share forfeitures and repurchases (305)   (305)    
Net loss (69,432)     (69,432)  
Distributions to common shareholders (63,187)       (63,187)
Balance ending (in shares) at Dec. 31, 2023   48,755,415      
Balance ending at Dec. 31, 2023 $ 1,255,679 $ 488 $ 2,621,493 $ 100,174 $ (1,466,476)
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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net loss $ (69,432) $ (6,109) $ (8,180)
Adjustments to reconcile net loss to net cash provided by operating activities:      
Depreciation 107,460 96,966 92,266
Net amortization of debt premiums, discounts and issuance costs 9,209 9,134 9,771
Amortization of acquired real estate leases and assumed real estate lease obligations, net 92,805 119,703 144,826
Amortization of deferred leasing costs 10,063 7,994 7,878
Gain on sale of real estate (3,780) (11,001) (78,354)
Loss on impairment of real estate 11,299 21,820 62,420
(Gain) loss on early extinguishment of debt 0 (682) 9,694
Straight line rental income (26,194) (10,830) (15,368)
Other non-cash expenses, net 1,168 1,818 1,782
Equity in net losses of investees 3,031 3,509 2,501
Loss on impairment of equity method investment 19,183 0 0
Change in assets and liabilities:      
Rents receivable (2,376) 10,961 2,663
Deferred leasing costs (23,510) (31,621) (19,769)
Other assets (1,495) 484 1,538
Accounts payable and other liabilities 13,739 (19,214) 7,151
Due to related persons 556 (318) 673
Net cash provided by operating activities 141,726 192,614 221,492
CASH FLOWS FROM INVESTING ACTIVITIES:      
Real estate acquisitions (2,785) 0 (563,447)
Real estate improvements (229,004) (204,104) (100,141)
Proceeds from sale of properties, net 42,181 203,280 219,980
Contributions to unconsolidated joint ventures (5,213) (3,851) 0
Net cash used in investing activities (194,821) (4,624) (442,985)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Repayment of mortgage notes payable (50,000) (47,617) (72,541)
Proceeds from issuance of mortgage notes payable 177,320 0 0
Repayment of senior unsecured notes 0 (300,000) (610,000)
Proceeds from issuance of senior unsecured notes, net 0 0 1,041,809
Borrowings on unsecured revolving credit facility 240,000 385,000 755,000
Repayments on unsecured revolving credit facility (230,000) (190,000) (755,000)
Payment of debt issuance costs (6,279) (469) (2,744)
Repurchase of common shares (294) (540) (1,003)
Distributions to common shareholders (63,187) (106,630) (106,368)
Net cash provided by (used in) financing activities 67,560 (260,256) 249,153
Increase (decrease) in cash, cash equivalents and restricted cash 14,465 (72,266) 27,660
Cash, cash equivalents and restricted cash at beginning of period 12,249 84,515 56,855
Cash, cash equivalents and restricted cash at end of period 26,714 12,249 84,515
SUPPLEMENTAL CASH FLOW INFORMATION:      
Interest paid 107,645 104,174 103,200
Income taxes paid 478 352 299
NON-CASH INVESTING ACTIVITIES:      
Real estate improvements accrued, not paid 32,231 42,772 18,492
Real estate acquisition 0 0 (13,031)
Capitalized interest 7,634 4,578 795
SUPPLEMENTAL DISCLOSURE OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH:      
Cash and cash equivalents 12,315 12,249 83,026
Restricted cash 14,399 0 1,489
Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows 26,714 12,249 84,515
Unconsolidated Joint Ventures      
CASH FLOWS FROM INVESTING ACTIVITIES:      
Distributions in excess of earnings 0 51 612
Affiliates Insurance Company      
CASH FLOWS FROM INVESTING ACTIVITIES:      
Distributions in excess of earnings $ 0 $ 0 $ 11
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Organization
12 Months Ended
Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Organization Organization
Office Properties Income Trust, or OPI, we, us or our, is a real estate investment trust, or REIT, formed in 2009 under Maryland law.
As of December 31, 2023, our wholly owned properties were comprised of 152 properties containing approximately 20,541,000 rentable square feet and we had noncontrolling ownership interests of 51% and 50% in two unconsolidated joint ventures that owned three properties totaling approximately 468,000 rentable square feet.
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Summary of Significant Accounting Policies
12 Months Ended
Dec. 31, 2023
Accounting Policies [Abstract]  
Summary of Significant Accounting Policies Summary of Significant Accounting Policies
Basis of Presentation. These consolidated financial statements include the accounts of us and our subsidiaries, all of which are wholly owned directly or indirectly by us. All intercompany transactions and balances with or among our consolidated subsidiaries have been eliminated.
Real Estate Properties. We record our properties at cost and provide depreciation on real estate investments on a straight line basis over estimated useful lives generally ranging from 7 to 40 years. In some circumstances, we engage independent real estate appraisal firms to provide market information and evaluations which are relevant to our purchase price allocations and determinations of useful lives; however, we are ultimately responsible for the purchase price allocations and determinations of useful lives.
We allocate the purchase prices of our properties to land, buildings and improvements based on determinations of the relative fair values of these assets assuming the properties are vacant. We determine the fair value of each property using methods similar to those used by independent appraisers, which may involve estimated cash flows that are based on a number of factors, including capitalization rates and discount rates, among others. We allocate a portion of the purchase price of our properties to above market and below market leases based on the present value (using an interest rate which reflects the risks associated with acquired in place leases at the time each property was acquired by us) of the difference, if any, between (i) the contractual amounts to be paid pursuant to the acquired in place leases and (ii) our estimates of fair market lease rates for the corresponding leases, measured over a period equal to the terms of the respective leases. We allocate a portion of the purchase price to acquired in place leases and tenant relationships based upon market estimates to lease up the property based on the leases in place at the time of purchase. We allocate this aggregate value between acquired in place lease values and tenant relationships based on our evaluation of the specific characteristics of each tenant’s lease. However, we have not separated the value of tenant relationships from the value of acquired in place leases because such value and related amortization expense is immaterial to the accompanying consolidated financial statements. In making these allocations, we consider factors such as estimated carrying costs during the expected lease up periods, including real estate taxes, insurance and other operating income and expenses and costs, such as leasing commissions, legal and other related expenses, to execute similar leases in current market conditions at the time a property was acquired by us. If the value of tenant relationships becomes material in the future, we may separately allocate those amounts and amortize the allocated amounts over the estimated life of the relationships. For transactions that qualify as business combinations, we allocate the excess, if any, of the consideration over the fair value of the assets acquired to goodwill.
We amortize capitalized above market lease values (included in acquired real estate leases, net in our consolidated balance sheets) and below market lease values (presented as assumed real estate lease obligations, net in our consolidated balance sheets) as a reduction or increase, respectively, to rental income over the terms of the associated leases. Such amortization resulted in a net increase to rental income of $252 during the year ended December 31, 2023 and net decreases to rental income of $975 and $2,288 during the years ended December 31, 2022 and 2021, respectively. We amortize the value of acquired in place leases (included in acquired real estate leases, net in our consolidated balance sheets), exclusive of the value of above market and below market acquired in place leases, over the terms of the associated leases. Such amortization, which is included in depreciation and amortization expense, amounted to $93,057, $118,728 and $142,538 during the years ended December 31, 2023, 2022 and 2021, respectively. If a lease is terminated prior to its stated expiration, we write off the unamortized amounts relating to that lease.
As of December 31, 2023 and 2022, our acquired real estate leases and assumed real estate lease obligations, excluding properties classified as held for sale, were as follows:
 December 31,
20232022
Acquired real estate leases:
Capitalized above market lease values$14,758 $15,792 
Less: accumulated amortization(10,876)(9,672)
Capitalized above market lease values, net3,882 6,120 
Lease origination value572,766 728,773 
Less: accumulated amortization(313,150)(365,560)
Lease origination value, net259,616 363,213 
Acquired real estate leases, net$263,498 $369,333 
Assumed real estate lease obligations:
Capitalized below market lease values$25,678 $27,033 
Less: accumulated amortization(14,013)(12,876)
Assumed real estate lease obligations, net$11,665 $14,157 
As of December 31, 2023, the weighted average amortization periods for capitalized above market leases, lease origination value and capitalized below market lease values were 3.4 years, 6.5 years and 11.0 years, respectively. Future amortization of net intangible lease assets and liabilities, to be recognized over the current terms of the associated leases as of December 31, 2023 are estimated to be $67,692 in 2024, $48,838 in 2025, $35,068 in 2026, $26,833 in 2027, $14,123 in 2028 and $59,279 thereafter.
We regularly evaluate whether events or changes in circumstances have occurred that could indicate an impairment in the value of long lived assets. Impairment indicators may include declining tenant occupancy, lack of progress releasing vacant space, tenant bankruptcies, low long term prospects for improvement in property performance, weak or declining tenant profitability, cash flow or liquidity, our decision to dispose of an asset before the end of its estimated useful life and legislative, market or industry changes that could permanently reduce the value of a property. If there is an indication that the carrying value of an asset is not recoverable, we estimate the projected undiscounted cash flows to determine if an impairment loss should be recognized. The future net undiscounted cash flows are subjective and are based in part on assumptions regarding hold periods, market rents and terminal capitalization rates. We determine the amount of any impairment loss by comparing the historical carrying value to estimated fair value. We estimate fair value through an evaluation of recent financial performance and projected discounted cash flows using standard industry valuation techniques. In addition to consideration of impairment upon the events or changes in circumstances described above, we regularly evaluate the remaining useful lives of our long lived assets. If we change our estimate of the remaining useful lives, we allocate the carrying value of the affected assets over their revised remaining useful lives.
Cash and Cash Equivalents. We consider highly liquid investments with original maturities of three months or less at the date of purchase to be cash equivalents.
Restricted Cash. Restricted cash consists of amounts escrowed for future real estate taxes, insurance, leasing costs, capital expenditures and debt service, as required by certain of our mortgage debts.
Deferred Leasing Costs. Deferred leasing costs include brokerage costs and inducements associated with our entering leases. We amortize deferred leasing costs, which are included in depreciation and amortization expense, and inducements, which are included as a reduction to rental income, on a straight line basis over the terms of the respective leases. Legal costs associated with the execution of our leases are expensed as incurred and included in general and administrative expenses in our consolidated statements of comprehensive income (loss). We recorded amortization of deferred leasing costs of $8,737, $6,869 and $6,691, and reductions to rental income related to the amortization of inducements of $1,326, $1,124 and $1,187 for the years ended December 31, 2023, 2022 and 2021, respectively. Deferred leasing costs, excluding properties classified as held for sale, totaled $113,433 and $94,680 at December 31, 2023 and 2022, respectively, and accumulated amortization of deferred
leasing costs totaled $26,462 and $21,582 at December 31, 2023 and 2022, respectively. Future amortization of deferred leasing costs to be recognized during the current terms of our existing leases as of December 31, 2023 are estimated to be $11,807 in 2024, $10,549 in 2025, $9,912 in 2026, $8,919 in 2027, $8,116 in 2028 and $37,668 thereafter.
Debt Issuance Costs. Costs related to the issuance or assumption of debt are capitalized and amortized to interest expense over the terms of the respective loans. Debt issuance costs, net of accumulated amortization, for our prior $750,000 unsecured revolving credit facility, or our prior revolving credit facility, are included in other assets in our consolidated balance sheets. As of December 31, 2023 and 2022, debt issuance costs for our prior revolving credit facility were $5,328 and $4,593, respectively, and accumulated amortization of debt issuance costs for our prior revolving credit facility were $5,240 and $4,072, respectively. Debt issuance costs, net of accumulated amortization, for our senior unsecured notes and mortgage notes payable are presented as a direct deduction from the associated debt liability in our consolidated balance sheets. As of December 31, 2023 and 2022, debt issuance costs, net of accumulated amortization, for our senior unsecured notes and mortgage notes payable totaled $16,623 and $13,589, respectively. Future amortization of debt issuance costs to be recognized with respect to our prior revolving credit facility, senior unsecured notes and mortgage notes payable as of December 31, 2023 are estimated to be $3,147 in 2024, $2,573 in 2025, $2,239 in 2026, $1,499 in 2027, $1,231 in 2028 and $6,022 thereafter.
Equity Method Investments. As of December 31, 2023, we had noncontrolling ownership interests of 51% and 50% in two unconsolidated joint ventures that owned three properties. The properties owned by these joint ventures are encumbered by an aggregate of $82,000 of mortgage indebtedness. We did not control the activities that are most significant to these joint ventures and, as a result, we accounted for our investments in these joint ventures under the equity method of accounting. See Note 4 for more information regarding our unconsolidated joint ventures.
We periodically evaluate our equity method investments for possible indicators of other than temporary impairment whenever events or changes in circumstances indicate the carrying amount of the investment might not be recoverable. These indicators may include the length of time and the extent to which the market value of our investment is below our carrying value, the financial condition of our investees, our intent and ability to be a long term holder of the investment and other considerations. If the decline in fair value is judged to be other than temporary, we record an impairment charge to adjust the basis of the investment to its estimated fair value.
Revenue Recognition. We are a lessor of commercial office properties. Our leases provide our tenants with the contractual right to use and economically benefit from all of the physical space specified in the leases; therefore, we have determined to evaluate our leases as lease arrangements.
Our leases provide for base rent payments and in addition may include variable payments. Rental income from operating leases, including any payments derived by index or market-based indices, is recognized on a straight line basis over the lease term when we have determined that the collectability of substantially all of the lease payments is probable. Some of our leases have options to extend or terminate the lease exercisable at the option of our tenants, which are considered when determining the lease term. Allowances for bad debts are recognized as a direct reduction of rental income.
Certain of our leases contain non-lease components, such as property level operating expenses and capital expenditures reimbursed by our tenants as well as other required lease payments. We have made the policy election to not separate the lease and non-lease components because (i) the lease components are operating leases and (ii) the timing and pattern of recognition of the non-lease components are the same as those of the lease components. We apply Accounting Standards Codification 842, Leases, to the combined component. Income derived by our leases is recorded in rental income in our consolidated statements of comprehensive income (loss).
Certain tenants are obligated to pay directly their obligations under their leases for insurance, real estate taxes and certain other expenses. These obligations, which have been assumed by the tenants under the terms of their respective leases, are not reflected in our consolidated financial statements. To the extent any tenant responsible for any such obligations under the applicable lease defaults on such lease or if it is deemed probable that the tenant will fail to pay for such obligations, we would record a liability for such obligations. See Note 5 for more information regarding our leases.
Income Taxes. We have elected to be taxed as a REIT under the United States Internal Revenue Code of 1986, as amended, and, accordingly, we generally will not be subject to federal income taxes provided we distribute our taxable income and meet certain other requirements to qualify for taxation as a REIT. We are, however, subject to certain state and local taxes.
Per Common Share Amounts. We calculate basic earnings per common share using the two class method. We calculate diluted earnings per share using the more dilutive of the two class method or the treasury stock method. Unvested share awards and other potentially dilutive common shares, together with the related impact on earnings, are considered when calculating diluted earnings per share.
Use of Estimates. Preparation of these financial statements in conformity with GAAP requires us to make estimates and assumptions that may affect the amounts reported in these consolidated financial statements and related notes. The actual results could differ from these estimates. Significant estimates in the consolidated financial statements include purchase price allocations, useful lives of fixed assets and assessment of impairment of real estate and the related intangibles.
Segment Reporting. We operate in one business segment: direct ownership of real estate properties.
New Accounting Pronouncements. On November 27, 2023, the Financial Accounting Standards Board issued Accounting Standards Update No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, or ASU No. 2023-07, which requires public entities to: (i) provide disclosures of significant segment expenses and other segment items if they are regularly provided to the Chief Operating Decision Maker, or the CODM, and included in each reported measure of segment profit or loss; (ii) provide all annual disclosures about a reportable segment’s profit or loss and assets currently required by Accounting Standards Codification 280, Segment Reporting, or ASC 280, in interim periods; and (iii) disclose the CODM’s title and position, as well as an explanation of how the CODM uses the reported measures and other disclosures. Public entities with a single reportable segment must apply all the disclosure requirements of ASU No. 2023-07, as well as all the existing segment disclosures under ASC 280. The amendments in ASU No. 2023-07 are incremental to the requirements in ASC 280 and do not change how a public entity identifies its operating segments, aggregates those operating segments, or applies the quantitative thresholds to determine its reportable segments. ASU No. 2023-07 should be applied retrospectively to all prior periods presented in the financial statements and is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. We are currently evaluating the impact ASU No. 2023-07 will have on our consolidated financial statements and disclosures.
v3.24.0.1
Per Common Share Amounts
12 Months Ended
Dec. 31, 2023
Earnings Per Share [Abstract]  
Per Common Share Amounts Per Common Share Amounts
The calculation of basic and diluted earnings per share is as follows (amounts in thousands, except per share amounts):
Year Ended December 31,
202320222021
Numerators:
Net loss$(69,432)$(6,109)$(8,180)
Income attributable to unvested participating securities(305)(427)— 
Net loss used in calculating earnings per share$(69,737)$(6,536)$(8,180)
Denominators:
Weighted average common shares outstanding - basic and diluted (1)
48,389 48,278 48,195 
Net loss per common share - basic and diluted$(1.44)$(0.14)$(0.17)
(1)For the years ended December 31, 2023, 2022 and 2021, there were no dilutive common shares. For the year ended December 31, 2021, 34 unvested common shares were not included in the calculation of diluted earnings per share because to do so would have been antidilutive.
v3.24.0.1
Real Estate Properties
12 Months Ended
Dec. 31, 2023
Real Estate [Abstract]  
Real Estate Properties Real Estate Properties
As of December 31, 2023, our wholly owned properties were comprised of 152 properties containing approximately 20,541,000 rentable square feet, with an undepreciated carrying value of $4,095,010, including $29,331 classified as held for sale. We also had noncontrolling ownership interests of 51% and 50% in two unconsolidated joint ventures that owned three properties containing approximately 468,000 rentable square feet. We generally lease space at our properties on a gross lease,
modified gross lease or net lease basis pursuant to fixed term contracts expiring between 2024 and 2053. Some of our leases generally require us to pay all or some property operating expenses and to provide all or most property management services. During the year ended December 31, 2023, we entered into 75 leases for approximately 1,698,000 rentable square feet for a weighted (by rentable square feet) average lease term of 8.5 years and we made commitments of $82,202 for leasing related costs. As of December 31, 2023, we had estimated unspent leasing related obligations of $109,309.
Acquisition Activities
2023 Acquisition Activities
In December 2023, we acquired a vacant land parcel adjacent to a property we own in Irving, TX for $2,750, excluding acquisition related costs.
2022 Acquisition Activities
We did not acquire any properties during the year ended December 31, 2022.
2021 Acquisition Activities
During the year ended December 31, 2021, we acquired three properties containing approximately 926,000 rentable square feet for an aggregate purchase price of $576,478, including net purchase price adjustments of $1,761 and acquisition related costs of $1,264. These acquisitions were accounted for as asset acquisitions. We allocated the purchase prices of these acquisitions based on the relative estimated fair values of the acquired assets and assumed liabilities as follows:
Acquisition DateLocationNumber of PropertiesRentable Square FeetPurchase PriceLandBuildings and ImprovementsAcquired Real Estate LeasesAssumed Real Estate Lease Obligations
June 2021
Chicago, IL (1)
1531,000 $368,331 $42,935 $258,348 $76,136 $(9,088)
June 2021Atlanta, GA1346,000 180,602 13,040 135,459 32,103 — 
August 2021Boston, MA149,000 27,545 16,103 10,217 1,225 — 
3926,000$576,478 $72,078 $404,024 $109,464 $(9,088)
(1)Purchase price includes an adjustment of $13,031 to record an estimated real estate tax liability as of the acquisition date.
Disposition Activities
The sales completed during the years ended December 31, 2023, 2022 and 2021, as presented in the tables below, do not represent significant dispositions individually or in the aggregate, nor do they represent a strategic shift in our business. As a result, the results of operations of these properties are included in continuing operations through the date of sale in our consolidated statements of comprehensive income (loss).
2023 Disposition Activities
During the year ended December 31, 2023, we sold eight properties containing approximately 553,000 rentable square feet for an aggregate sales price of $44,874, excluding closing costs.
Date of SaleNumber of Properties LocationRentable Square Feet
Gross
 Sales Price (1)
Gain (Loss) on Sale of Real Estate
January 20233
Richmond, VA (2)
89,000 $5,350 $2,548 
April 20231Phoenix, AZ107,000 4,900 511 
June 20231Vernon Hills, IL100,000 2,825 (2,816)
September 20231Windsor Mill, MD80,000 10,500 244 
October 20231Santa Clara, CA66,000 16,049 705 
November 20231Chelmsford, MA111,000 5,250 2,588 
8553,000 $44,874 $3,780 
(1)Gross sales price is the gross contract price, excluding closing costs.
(2)Properties were classified as held for sale as of December 31, 2022.

As of December 31, 2023, we had one property located in Chicago, IL containing approximately 248,000 rentable square feet classified as held for sale in our consolidated balance sheets. We recorded an $11,299 loss on impairment of real estate to reduce the carrying value of this property to its estimated fair value less costs to sell as of December 31, 2023. As of February 14, 2024, we have entered into an agreement to sell this property for a sales price of $39,000, excluding closing costs. This pending sale is subject to conditions; accordingly, we cannot be sure that we will complete this sale or that this sale will not be delayed or the terms will not change.
2022 Disposition Activities
During the year ended December 31, 2022, we sold 18 properties containing approximately 2,326,000 rentable square feet for an aggregate sales price of $211,020, excluding closing costs.
Date of SaleNumber of Properties LocationRentable Square Feet
Gross
 Sales Price (1)
Gain (Loss) on Sale of Real EstateLoss on Impairment of Real Estate
January 20221
Rockville, MD (2)
129,000 $6,750 $(72)$— 
February 20222
Chesapeake, VA (2)
172,000 18,945 2,296 — 
March 20221
Milwaukee, WI (2)
29,000 3,775 (75)— 
May 20221Holtsville, NY264,000 28,500 1,900 — 
June 20221Fairfax, VA184,000 19,750 (13,537)— 
July 20221Houston, TX206,000 9,800 (135)15,278 
August 20223Birmingham, AL448,000 16,050 (265)3,709 
August 20221Erlanger, KY86,000 2,600 135 2,184 
September 20222Chesapeake, VA214,000 24,000 62649
September 20222Everett, WA112,000 31,500 11,959
September 20221Salem, OR233,000 34,250 5,369
November 20221
Kapolei, HI (3)
109,000 4,000 2,504
November 20221Englewood, CO140,000 11,100 860
182,326,000$211,020 $11,001 $21,820 
(1)Gross sales price is the gross contract price, excluding closing costs.
(2)Properties were classified as held for sale as of December 31, 2021.
(3)Property is a leasable land parcel.
2021 Disposition Activities
During the year ended December 31, 2021, we sold six properties, a warehouse facility and two vacant land parcels containing approximately 2,565,000 rentable square feet for an aggregate sales price of $226,915, excluding closing costs.
Date of SaleNumber of Properties LocationRentable Square Feet
Gross
 Sales Price (1)
Gain (Loss) on Sale of Real EstateLoss on Impairment of Real Estate
January 2021
Kansas City, MO (2)(3)
10,000 $845 $(63)$— 
January 20211
Richmond, VA (2)
311,000 130,000 54,181 — 
April 20211Huntsville, AL1,371,000 39,000 — 5,383 
July 20211Fresno, CA532,000 6,000 — 33,902 
July 20211Liverpool, NY38,000 650 31 — 
August 20211Memphis, TN205,000 15,270 287 — 
September 20211Stoneham, MA98,000 6,650 (282)5,911 
October 2021
Sterling, VA (4)
— 28,500 24,200 — 
62,565,000 $226,915 $78,354 $45,196 
(1)Gross sales price is the gross contract price, excluding closing costs.
(2)Properties were classified as held for sale as of December 31, 2020.
(3)Consists of a warehouse facility.
(4)Consists of two vacant land parcels.
We also recorded a $10,658 loss on impairment of real estate to reduce the carrying value of three properties that were classified as held for sale to their estimated fair values less costs to sell as of September 30, 2021. Subsequently, we removed these properties from held for sale status due to a change of plan for sale and recorded an impairment adjustment of $425 to increase the carrying value of these properties to their estimated fair value as of December 31, 2021. In addition, we recorded a $6,991 loss on impairment of real estate to reduce the carrying value of two properties that were classified as held for sale as of December 31, 2021 and subsequently sold in 2022.
Unconsolidated Joint Ventures
As of December 31, 2023, we owned interests in two joint ventures that owned three properties. We accounted for these investments under the equity method of accounting. As of December 31, 2023 and 2022, our investments in unconsolidated joint ventures consisted of the following:
OPI OwnershipOPI Carrying Value of Investments at December 31, Number of PropertiesLocationRentable Square Feet
Joint Venture20232022
Prosperity Metro Plaza51%$18,128 $19,237 2Fairfax, VA346,000
1750 H Street, NW50%— 15,892 1Washington, D.C.122,000
Total $18,128 $35,129 3468,000
In October 2023, our joint venture partner in our 1750 H Street, NW joint venture failed to fund a $600 capital call and was in default of the joint venture agreement as of December 31, 2023. During our periodic evaluation of our equity method investments for impairment, we determined that the estimated fair value of our investment in our 1750 H Street, NW joint venture was lower than our carrying value and the decline was other than temporary based on current market conditions and the default of our joint venture partner. As a result, we recorded a loss on impairment of equity method investment of $19,183 during the year ended December 31, 2023 to fully write off its carrying value.
The following table provides a summary of the mortgage debt of our two unconsolidated joint ventures:
Joint Venture
Interest Rate (1)
Maturity Date
Principal Balance at December 31, 2023 and 2022 (2)
Prosperity Metro Plaza4.09%12/1/2029$50,000 
1750 H Street, NW (3)
3.69%8/1/202732,000 
Weighted Average/Total3.93%$82,000 
(1)Includes the effect of mark to market purchase accounting.
(2)Reflects the entire balance of the debt secured by the properties and is not adjusted to reflect the interests in the joint ventures we did not own. None of the debt is recourse to us.
(3)In July 2023, the maturity date of this mortgage loan was extended by three years at the same interest rate.
As of December 31, 2023, the unamortized basis difference of our Prosperity Metro Plaza joint venture of $701 was primarily attributable to the difference between the amount we paid to purchase our interest in this joint venture, including transaction costs, and the historical carrying value of the net assets of this joint venture. This difference is being amortized over the remaining useful life of the related property and the resulting amortization expense is included in equity in net losses of investees in our consolidated statements of comprehensive income (loss). As of December 31, 2023, there was no unamortized basis difference for our 1750 H Street, NW joint venture.
v3.24.0.1
Leases
12 Months Ended
Dec. 31, 2023
Leases [Abstract]  
Leases Leases
Rental income from operating leases, including payments derived by index or market-based indices, is recognized on a straight line basis over the lease term when we have determined that the collectability of substantially all of the lease payments is probable. We increased rental income by $26,194, $10,830 and $15,368 to record revenue on a straight line basis during the years ended December 31, 2023, 2022 and 2021, respectively. Rents receivable, excluding properties classified as held for sale, include $112,440 and $86,305 of straight line rent receivables at December 31, 2023 and 2022, respectively.
We do not include in our measurement of our lease receivables certain variable payments, including payments determined by changes in the index or market-based indices after the inception of the lease, certain tenant reimbursements and other income until the specific events that trigger the variable payments have occurred. Such payments totaled $88,173, $83,103 and $85,107 for the years ended December 31, 2023, 2022 and 2021, respectively, of which tenant reimbursements totaled $82,885, $78,388 and $81,295, respectively.
The following operating lease maturity analysis presents the future contractual lease payments to be received by us through 2053 as of December 31, 2023:
YearAmount
2024$378,748 
2025339,500 
2026310,205 
2027281,109 
2028243,928 
Thereafter1,428,379 
Total$2,981,869 
As of December 31, 2023, tenants representing approximately 1.8% of our total operating lease maturities had exercisable rights to terminate their leases before the stated terms of their leases expire. In 2024, 2025, 2026, 2027, 2028, 2029, 2030, 2031, 2032, 2034, 2035, 2036, 2037 and 2040, early termination rights become exercisable by other tenants who represented an additional approximately 1.4%, 2.5%, 2.4%, 2.0%, 6.1%, 2.0%, 2.6%, 1.0%, 0.8%, 1.4%, 4.4%, 0.6%, 0.6% and 2.3% of our total operating lease maturities, respectively. In certain circumstances, some leases provide the tenant with the right to terminate if the legislature or other funding authority does not appropriate the funding necessary for the tenant to meet its lease obligations; we have determined the fixed non-cancelable lease term of these leases to be the full term of the lease because we believe the occurrence of early terminations to be a remote contingency based on both our historical experience and our assessments of the likelihood of lease cancellation on a separate lease basis. As of December 31, 2023, eight of our tenants had
the right to terminate their leases if the respective legislature or other funding authority does not appropriate the funding necessary for the tenant to meet its obligation. These eight tenants represented approximately 3.9% of our total operating lease maturities as of December 31, 2023.
Leases where we are the lessee. We had one lease where we were the lessee which expired on January 31, 2021. We subleased a portion of the space, which sublease also expired on January 31, 2021. Rent expense incurred under the lease, net of sublease revenue, was $79 for the year ended December 31, 2021.
Leases Leases
Rental income from operating leases, including payments derived by index or market-based indices, is recognized on a straight line basis over the lease term when we have determined that the collectability of substantially all of the lease payments is probable. We increased rental income by $26,194, $10,830 and $15,368 to record revenue on a straight line basis during the years ended December 31, 2023, 2022 and 2021, respectively. Rents receivable, excluding properties classified as held for sale, include $112,440 and $86,305 of straight line rent receivables at December 31, 2023 and 2022, respectively.
We do not include in our measurement of our lease receivables certain variable payments, including payments determined by changes in the index or market-based indices after the inception of the lease, certain tenant reimbursements and other income until the specific events that trigger the variable payments have occurred. Such payments totaled $88,173, $83,103 and $85,107 for the years ended December 31, 2023, 2022 and 2021, respectively, of which tenant reimbursements totaled $82,885, $78,388 and $81,295, respectively.
The following operating lease maturity analysis presents the future contractual lease payments to be received by us through 2053 as of December 31, 2023:
YearAmount
2024$378,748 
2025339,500 
2026310,205 
2027281,109 
2028243,928 
Thereafter1,428,379 
Total$2,981,869 
As of December 31, 2023, tenants representing approximately 1.8% of our total operating lease maturities had exercisable rights to terminate their leases before the stated terms of their leases expire. In 2024, 2025, 2026, 2027, 2028, 2029, 2030, 2031, 2032, 2034, 2035, 2036, 2037 and 2040, early termination rights become exercisable by other tenants who represented an additional approximately 1.4%, 2.5%, 2.4%, 2.0%, 6.1%, 2.0%, 2.6%, 1.0%, 0.8%, 1.4%, 4.4%, 0.6%, 0.6% and 2.3% of our total operating lease maturities, respectively. In certain circumstances, some leases provide the tenant with the right to terminate if the legislature or other funding authority does not appropriate the funding necessary for the tenant to meet its lease obligations; we have determined the fixed non-cancelable lease term of these leases to be the full term of the lease because we believe the occurrence of early terminations to be a remote contingency based on both our historical experience and our assessments of the likelihood of lease cancellation on a separate lease basis. As of December 31, 2023, eight of our tenants had
the right to terminate their leases if the respective legislature or other funding authority does not appropriate the funding necessary for the tenant to meet its obligation. These eight tenants represented approximately 3.9% of our total operating lease maturities as of December 31, 2023.
Leases where we are the lessee. We had one lease where we were the lessee which expired on January 31, 2021. We subleased a portion of the space, which sublease also expired on January 31, 2021. Rent expense incurred under the lease, net of sublease revenue, was $79 for the year ended December 31, 2021.
v3.24.0.1
Business and Property Management Agreements with RMR
12 Months Ended
Dec. 31, 2023
Related Party Transactions [Abstract]  
Business and Property Management Agreements with RMR Business and Property Management Agreements with RMR
We have no employees. The personnel and various services we require to operate our business are provided to us by The RMR Group LLC, or RMR. We have two agreements with RMR to provide management services to us: (1) a business management agreement, which relates to our business generally; and (2) a property management agreement, which relates to our property level operations.
Management Agreements with RMR. Our management agreements with RMR provide for an annual base management fee, an annual incentive management fee and property management and construction supervision fees, payable in cash, among other terms:
Base Management Fee. The annual base management fee payable to RMR by us for each applicable period is equal to the lesser of:
the sum of (a) 0.5% of the average aggregate historical cost of the real estate assets acquired from a REIT to which RMR provided business management or property management services, or the Transferred Assets, plus (b) 0.7% of the average aggregate historical cost of our real estate investments excluding the Transferred Assets up to $250,000, plus (c) 0.5% of the average aggregate historical cost of our real estate investments excluding the Transferred Assets exceeding $250,000; and
the sum of (a) 0.7% of the average closing price per share of our common shares on the stock exchange on which such shares are principally traded during such period, multiplied by the average number of our common shares outstanding during such period, plus the daily weighted average of the aggregate liquidation preference of each class of our preferred shares outstanding during such period, plus the daily weighted average of the aggregate principal amount of our consolidated indebtedness during such period, or, together, our Average Market Capitalization, up to $250,000, plus (b) 0.5% of our Average Market Capitalization exceeding $250,000.
The average aggregate historical cost of our real estate investments includes our consolidated assets invested, directly or indirectly, in equity interests in or loans secured by real estate and personal property owned in connection with such real estate (including acquisition related costs and costs which may be allocated to intangibles or are unallocated), all before reserves for depreciation, amortization, impairment charges or bad debts or other similar non-cash reserves.
Incentive Management Fee. The incentive management fee which may be earned by RMR for an annual period is calculated as follows:
An amount, subject to a cap based on the value of our common shares outstanding, equal to 12% of the product of:
our equity market capitalization on the last trading day of the year immediately prior to the relevant three year measurement period, and
the amount (expressed as a percentage) by which the total return per share, as defined in the business management agreement and further described below, of our common shareholders (i.e., share price appreciation plus dividends) exceeds the total shareholder return of the applicable index, or the benchmark return per share, for the relevant measurement period. The MSCI U.S. REIT/Office REIT Index is the benchmark index for periods on and after August 1, 2021, and the SNL U.S. REIT Office Index is the benchmark index for periods prior to August 1, 2021.
For purposes of the total return per share of our common shareholders, share price appreciation for a measurement period is determined by subtracting (1) the closing price of our common shares on The Nasdaq Stock Market LLC, or Nasdaq, on the last trading day of the year immediately before the first year of the applicable measurement period, or the initial share price, from (2) the average closing price of our common shares on the 10 consecutive trading days having the highest average closing prices during the final 30 trading days in the last year of the measurement period.
The calculation of the incentive management fee (including the determinations of our equity market capitalization, initial share price and the total return per share of our common shareholders) is subject to adjustments if we issue or repurchase our common shares, or if our common shares are forfeited, during the measurement period.
No incentive management fee is payable by us unless our total return per share during the measurement period is positive.
The measurement periods are three year periods ending with the year for which the incentive management fee is being calculated.
If our total return per share exceeds 12% per year in any measurement period, the benchmark return per share is adjusted to be the lesser of the total shareholder return of the applicable index for such measurement period and 12% per year, or the adjusted benchmark return per share. In instances where the adjusted benchmark return per share applies, the incentive management fee will be reduced if our total return per share is between 200 basis points and 500 basis points below the applicable index in any year by a low return factor, as defined in the business management agreement, and there will be no incentive management fee paid if, in these instances, our total return per share is more than 500 basis points below the applicable index in any year, determined on a cumulative basis (i.e., between 200 basis points and 500 basis points per year multiplied by the number of years in the measurement period and below the applicable market index).
The incentive management fee is subject to a cap. The cap is equal to the value of the number of our common shares which would, after issuance, represent 1.5% of the number of our common shares then outstanding multiplied by the average closing price of our common shares during the 10 consecutive trading days having the highest average closing prices during the final 30 trading days of the relevant measurement period.
Incentive management fees we paid to RMR for any period may be subject to “clawback” if our financial statements for that period are restated due to material non-compliance with any financial reporting requirements under the securities laws as a result of the bad faith, fraud, willful misconduct or gross negligence of RMR and the amount of the incentive management fee we paid was greater than the amount we would have paid based on the restated financial statements.
Pursuant to our business management agreement with RMR, we recognized net business management fees of $14,751, $17,376 and $18,637 for the years ended December 31, 2023, 2022 and 2021, respectively. The net business management fees we recognized are included in general and administrative expenses in our consolidated statements of comprehensive income (loss) for these periods. The net business management fees we recognized for each of the years ended December 31, 2023, 2022 and 2021 reflect a reduction of $603, for the amortization of the liability we recorded in connection with our former investment in RMR Inc. We did not incur any incentive management fee pursuant to our business management agreement for the years ended December 31, 2023, 2022 or 2021.
Property Management and Construction Supervision Fees. The property management fees payable to RMR by us for each applicable period are equal to 3.0% of gross collected rents and the construction supervision fees payable to RMR by us for each applicable period are equal to 5.0% of construction costs. Pursuant to our property management agreement with RMR, we recognized aggregate net property management and construction supervision fees of $23,280, $25,756 and $21,103 for each of the years ended December 31, 2023, 2022 and 2021, respectively. The net property management and construction supervision fees we recognized for the years ended December 31, 2023, 2022 and 2021 reflect a reduction of $484 for each of those years for the amortization of the liability we recorded in connection with our former investment in RMR Inc. For the years ended December 31, 2023, 2022 and 2021, $14,890, $15,839 and $16,507, respectively, of the total net property management and construction supervision fees were expensed to other operating expenses in our consolidated statements of income (loss) and $8,390, $9,917 and $4,596,
respectively, were capitalized as building improvements in our consolidated balance sheets. The amounts capitalized are being depreciated over the estimated useful lives of the related capital assets.
Expense Reimbursement. We are generally responsible for all of our operating expenses, including certain expenses incurred or arranged by RMR on our behalf. We are generally not responsible for payment of RMR’s employment, office or administrative expenses incurred to provide management services to us, except for the employment and related expenses of RMR’s employees assigned to work exclusively or partly at our properties, our share of the wages, benefits and other related costs of RMR’s centralized accounting personnel, our share of RMR’s costs for providing our internal audit function and as otherwise agreed. Our property level operating expenses are generally incorporated into rents charged to our tenants, including certain payroll and related costs incurred by RMR. We reimbursed RMR $25,872, $24,371 and $24,766 for these expenses and costs for each of the years ended December 31, 2023, 2022 and 2021, respectively. We included these amounts in other operating expenses and general and administrative expense, as applicable, for these periods.
Term. Our management agreements with RMR have terms that end on December 31, 2043, and automatically extend on December 31st of each year for an additional year, so that the terms of our management agreements thereafter end on the 20th anniversary of the date of the extension.
Termination Rights. We have the right to terminate one or both of our management agreements with RMR: (i) at any time on 60 days’ written notice for convenience, (ii) immediately on written notice for cause, as defined therein, (iii) on written notice given within 60 days after the end of an applicable calendar year for a performance reason, as defined therein, and (iv) by written notice during the 12 months following a change of control of RMR, as defined therein. RMR has the right to terminate the management agreements for good reason, as defined therein.
Termination Fee. If we terminate one or both of our management agreements with RMR for convenience, or if RMR terminates one or both of our management agreements for good reason, we have agreed to pay RMR a termination fee in an amount equal to the sum of the present values of the monthly future fees, as defined therein, for the terminated management agreement(s) for the term that was remaining prior to such termination, which, depending on the time of termination, would be between 19 and 20 years. If we terminate one or both of our management agreements with RMR for a performance reason, we have agreed to pay RMR the termination fee calculated as described above, but assuming a 10-year term was remaining prior to the termination. We are not required to pay any termination fee if we terminate our management agreements with RMR for cause or as a result of a change of control of RMR.
Transition Services. RMR has agreed to provide certain transition services to us for 120 days following an applicable termination by us or notice of termination by RMR, including cooperating with us and using commercially reasonable efforts to facilitate the orderly transfer of the management and real estate investment services provided under our business management agreement and to facilitate the orderly transfer of the management of the managed properties under our property management agreement, as applicable.
Vendors. Pursuant to our management agreements with RMR, RMR may from time to time negotiate on our behalf with certain third party vendors and suppliers for the procurement of goods and services to us. As part of this arrangement, we may enter agreements with RMR and other companies to which RMR or its subsidiaries provide management services for the purpose of obtaining more favorable terms from such vendors and suppliers.
Investment Opportunities. Under our business management agreement with RMR, we acknowledge that RMR may engage in other activities or businesses and act as the manager to any other person or entity (including other REITs) even though such person or entity has investment policies and objectives similar to ours and we are not entitled to preferential treatment in receiving information, recommendations and other services from RMR.
Management Agreements between our Joint Ventures and RMR. RMR provides management services to our two unconsolidated joint ventures. We are not obligated to pay management fees to RMR under our management agreements with RMR for the services it provides regarding the joint ventures. The joint ventures pay management fees directly to RMR.
v3.24.0.1
Related Person Transactions
12 Months Ended
Dec. 31, 2023
Related Party Transactions [Abstract]  
Related Person Transactions Related Person Transactions
We have relationships and historical and continuing transactions with RMR, RMR Inc. and others related to them, including other companies to which RMR or its subsidiaries provide management services and some of which have trustees, directors or officers who are also our Trustees or officers. RMR is a majority owned subsidiary of RMR Inc. The Chair of our
Board of Trustees and one of our Managing Trustees, Adam D. Portnoy, is the sole trustee, an officer and the controlling shareholder of ABP Trust, which is the controlling shareholder of RMR Inc., the chair of the board of directors, a managing director, the president and chief executive officer of RMR Inc. and an officer and employee of RMR. Jennifer Clark, our other Managing Trustee, is a managing director and the executive vice president, general counsel and secretary of RMR Inc., an officer and employee of RMR and an officer of ABP Trust. Each of our officers is also an officer and employee of RMR. Some of our Independent Trustees also serve as independent trustees of other public companies to which RMR or its subsidiaries provide management services. Mr. Portnoy serves as chair of the boards and as a managing trustee of these public companies. Other officers of RMR, including Ms. Clark, serve as managing trustees or officers of certain of these companies.
Our Manager, RMR. We have two agreements with RMR to provide management services to us. RMR also provides management services to our unconsolidated joint ventures. See Note 6 for more information regarding our and our unconsolidated joint ventures’ management agreements with RMR.
Leases with RMR. We lease office space to RMR in certain of our properties for RMR’s property management offices. Pursuant to our lease agreements with RMR, we recognized rental income from RMR for leased office space of $851, $1,126 and $1,138 for the years ended December 31, 2023, 2022 and 2021, respectively. Our office space leases with RMR are terminable by RMR if our management agreements with RMR are terminated.
Share Awards to RMR Employees. As described further in Note 11, we award shares to our officers and other employees of RMR annually. Generally, one fifth of these awards vest on the grant date and one fifth vests on each of the next four anniversaries of the grant dates. In certain instances, we may accelerate the vesting of an award, such as in connection with the award holder’s retirement as an officer of us or an officer or employee of RMR. These awards to RMR employees are in addition to the share awards to our Managing Trustees, as Trustee compensation, and the fees we paid to RMR. See Note 11 for more information regarding our share awards and activity as well as certain share purchases we made in connection with share award recipients satisfying tax withholding obligations on vesting share awards.
Sonesta. In June 2021, we entered into a 30-year lease agreement with a subsidiary of Sonesta International Hotels Corporation, or Sonesta, in connection with the redevelopment of an office property we own in Washington, D.C. as a mixed-use property. Sonesta’s lease commenced in August 2023 and is for the full-service hotel component of the property that includes approximately 230,000 rentable square feet, which represents approximately 55% of the total square feet upon completion of the redevelopment. Sonesta has two options to extend the term for 10 years each. Pursuant to the lease agreement, Sonesta will pay us annual base rent of approximately $6,436 beginning 18 months after the lease commenced. The annual base rent will increase by 10% every five years throughout the term. Sonesta is also obligated to pay its pro rata share of the operating costs for the property. As of December 31, 2023, we have paid approximately $66,000 of tenant improvement costs for the build out of the hotel space pursuant to the lease agreement. Mr. Portnoy is a director and controlling shareholder of Sonesta and Ms. Clark is a director of Sonesta. Another officer and employee of RMR is a director and president and chief executive officer of Sonesta.
Terminated Merger Agreement with DHC. On April 11, 2023, we and Diversified Healthcare Trust, or DHC, entered into an Agreement and Plan of Merger, or the Merger Agreement, pursuant to which we and DHC had agreed that DHC would merge with and into us, with us as the surviving entity in the merger, subject to the terms and conditions of the Merger Agreement. On September 1, 2023, we and DHC mutually agreed to terminate the Merger Agreement and entered into a termination agreement, or the Termination Agreement. The mutual termination of the Merger Agreement was separately recommended by our and DHC’s respective Special Committees of each Board of Trustees, and approved by our and DHC’s respective Board of Trustees. Neither we nor DHC were required to pay any termination fee as a result of the mutual decision to terminate the Merger Agreement. We and DHC bore our and its respective costs and expenses related to the Merger Agreement and the transactions contemplated thereby in accordance with the terms of the Merger Agreement. We recorded $31,491 of expenses during the year ended December 31, 2023 related to the potential merger with DHC, which is included in acquisition and transaction related costs in our consolidated statement of comprehensive income (loss).
Contemporaneously with the execution of the Merger Agreement, on April 11, 2023, we and our manager, RMR, entered into a Third Amended and Restated Property Management Agreement, or the Amended Property Management Agreement. The effectiveness of the Amended Property Management Agreement was conditioned upon the consummation of the merger. Since the merger was not consummated, the Amended Property Management Agreement did not become effective and the Second Amended and Restated Property Management Agreement between us and RMR remains in effect.
v3.24.0.1
Concentration
12 Months Ended
Dec. 31, 2023
Risks and Uncertainties [Abstract]  
Concentration Concentration
Tenant and Credit Concentration
As of December 31, 2023, 2022 and 2021, the U.S. government and certain state and other government tenants combined were responsible for approximately 27.5%, 28.5% and 28.9%, respectively, of our annualized rental income. The U.S. government is our largest tenant by annualized rental income and represented approximately 19.5%, 19.7%, and 19.5% of our annualized rental income as of December 31, 2023, 2022 and 2021, respectively. We define annualized rental income as the annualized contractual base rents from our tenants pursuant to our lease agreements as of the measurement date, plus straight line rent adjustments and estimated recurring expense reimbursements to be paid to us, and excluding lease value amortization.
Geographic Concentration
As of December 31, 2023, our 152 wholly owned properties were located in 30 states and the District of Columbia. Properties located in California, Virginia, Illinois, District of Columbia and Texas were responsible for approximately 11.8%, 11.6%, 10.6%, 9.3%, and 8.8% of our annualized rental income as of December 31, 2023, respectively.
v3.24.0.1
Indebtedness
12 Months Ended
Dec. 31, 2023
Debt Disclosure [Abstract]  
Indebtedness Indebtedness
As of December 31, 2023 and 2022, our outstanding indebtedness consisted of the following:
 December 31,
20232022
Revolving credit facility, due in 2024$205,000 $195,000 
Mortgage note payable, 3.700% interest rate, due in 2023 (1)
— 50,000 
Senior unsecured notes, 4.250% interest rate, due in 2024
350,000 350,000 
Senior unsecured notes, 4.500% interest rate, due in 2025
650,000 650,000 
Senior unsecured notes, 2.650% interest rate, due in 2026
300,000 300,000 
Senior unsecured notes, 2.400% interest rate, due in 2027
350,000 350,000 
Mortgage note payable, 8.272% interest rate, due in 2028
42,700 — 
Mortgage note payable, 8.139% interest rate, due in 2028
26,340 — 
Mortgage note payable, 7.671% interest rate, due in 2028
54,300 — 
Senior unsecured notes, 3.450% interest rate, due in 2031
400,000 400,000 
Mortgage note payable, 7.210% interest rate, due in 2033
30,680 — 
Mortgage note payable, 7.305% interest rate, due in 2033
8,400 — 
Mortgage note payable, 7.717% interest rate, due in 2033
14,900 — 
Senior unsecured notes, 6.375% interest rate, due in 2050
162,000 162,000 
2,594,320 2,457,000 
Unamortized debt premiums, discounts and issuance costs(21,711)(24,208)
$2,572,609 $2,432,792 
(1)This mortgage note was repaid at maturity in June 2023.
In January 2024, we entered into an amended and restated credit agreement, or our credit agreement, governing a new $325,000 secured revolving credit facility and a $100,000 secured term loan. Our credit agreement replaced our prior revolving credit facility, which had a maturity date of January 31, 2024. As collateral for all loans and other obligations under our credit agreement, certain of our subsidiaries pledged all of their respective equity interests in certain of our direct and indirect property owning subsidiaries, and our pledged subsidiaries provided first mortgage liens on 19 properties that had an undepreciated carrying value, including lease intangibles, other assets and other liabilities, of $941,937 as of December 31, 2023. We can borrow, repay, and reborrow funds available under our revolving credit facility until maturity, and no principal repayments on borrowings under our credit agreement are due until maturity. The maturity date of our credit agreement is January 29, 2027 and, subject to the payment of an extension fee and meeting certain other requirements, we can extend the stated maturity date of our revolving credit facility by one year. Our credit agreement contains a number of covenants, including covenants that require us to maintain certain financial ratios, restrict our ability to incur additional debt in excess of calculated amounts and,
subject to limited exceptions, restrict our ability to increase our distribution rate above the current level of $0.01 per common share per quarter and enter into share repurchases. Availability of borrowings under our credit agreement is subject to ongoing minimum performance and market values of the 19 collateral properties, our satisfying certain financial covenants and other credit facility conditions.
Interest payable on borrowings under our credit agreement is at a rate of the secured overnight financing rate, or SOFR, plus a margin of 350 basis points. We are also required to pay an unused facility fee on the amount of total lending commitments, which was 35 basis points per annum at February 14, 2024. As of February 14, 2024, we had $132,000 outstanding under our revolving credit facility, $100,000 outstanding under our term loan and $193,000 available for borrowing under our revolving credit facility.
Prior Revolving Credit Facility
Under our prior revolving credit facility, we were required to pay interest at a rate of SOFR plus a premium, which was 145 basis points per annum at December 31, 2023, on the amount outstanding under our prior revolving credit facility, as well as a facility fee on the total amount of lending commitments, which was 30 basis points per annum at December 31, 2023. As of December 31, 2023 and 2022, the annual interest rate payable on borrowings under our prior revolving credit facility was 6.9% and 5.4%, respectively. The weighted average annual interest rate for borrowings under our prior revolving credit facility was 6.5%, 4.0% and 1.2% for the years ended December 31, 2023, 2022 and 2021, respectively. As of December 31, 2023, we had $205,000 outstanding under our prior revolving credit facility.
Our revolving credit facility is governed by a credit agreement with a syndicate of institutional lenders. Our credit agreement and senior notes indentures and their supplements provide for acceleration of payment of all amounts due thereunder upon the occurrence and continuation of certain events of default, such as, in the case of our credit agreement, a change of control of us, which includes RMR ceasing to act as our business and property manager. Our credit agreement and our senior notes indentures and their supplements also contain, and our prior revolving credit facility contained, covenants, including covenants that restrict our ability to incur debts, require us to comply with certain financial covenants and, in the case of our credit agreement, restrict our ability to increase our distribution rate above the current level of $0.01 per common share per quarter. We believe we were in compliance with the terms and conditions of the respective covenants under our credit agreement and our senior notes indentures and their supplements at December 31, 2023.
Mortgage Note Issuances
During the year ended December 31, 2023, we issued six fixed rate, interest-only mortgage notes as summarized in the following table:
Issuance DateSecured By
Principal Balance (1)
Interest RateMaturity
Net Book Value of Collateral as of December 31, 2023
May 2023 (2)
One property
$30,680 7.210%7/1/2033$36,807 
June 2023
One property
26,340 8.139%7/1/202852,342 
June 2023
One property
42,700 8.272%7/1/202842,834 
June 2023
One property
8,400 7.305%7/1/203319,035 
August 2023
One property
14,900 7.717%9/1/203323,908 
September 2023
Two properties
54,300 7.671%10/6/202864,828 
Total / Weighted Average$177,320 7.792%$239,754 
(1)Our mortgage notes are non-recourse, subject to certain limited exceptions and do not contain any material financial covenants.
(2)Requires interest-only payments through May 2028, at which time principal and interest payments are due monthly through the maturity date.
Mortgage Note Repayment
In June 2023, we repaid at maturity, a mortgage note secured by one property with an outstanding principal balance of $50,000, an annual interest rate of 3.70%.
Senior Secured Notes Issuance
In February 2024, we issued $300,000 of 9.000% senior secured notes due 2029, or the 2029 Notes. The aggregate net proceeds from the offering of the 2029 Notes were $271,500, after initial purchaser discounts and other estimated offering expenses. The 2029 Notes are fully and unconditionally guaranteed on a joint, several and senior secured basis by certain of our subsidiaries and secured by a pledge of all of the respective equity interests of the subsidiary guarantors and first mortgage liens on 17 properties with an undepreciated carrying value, including lease intangibles, other assets and other liabilities, of $574,291 as of December 31, 2023. The 2029 Notes require semi-annual payments of interest only and are prepayable, at par plus accrued interest, after March 31, 2028.
Senior Unsecured Notes Redemption
In February 2024, we issued a notice of early redemption, at par plus accrued interest, of all of our $350,000 of 4.25% senior unsecured notes due 2024. The redemption is expected to take place in March 2024 and is conditioned upon our borrowing an amount under our revolving credit facility sufficient, together with the net proceeds from the offering of the 2029 Notes, to pay the redemption price on or prior to the redemption date.
The required principal payments due during the next five years and thereafter under all our outstanding consolidated debt as of December 31, 2023 were as follows:
YearPrincipal Payment
2024$555,000 
2025650,000 
2026300,000 
2027350,000 
2028123,487 
Thereafter615,833 
Total$2,594,320 
(1)
(1)Total consolidated debt outstanding as of December 31, 2023, net of unamortized premiums, discounts and issuance costs totaling $21,711, was $2,572,609.
None of our unsecured debt obligations require principal or sinking fund payments prior to their maturity dates.
We currently do not have sufficient sources of liquidity to repay our $650,000 senior unsecured notes due 2025 and are evaluating market-based alternatives to obtain debt financing. Based on the significant number of unencumbered properties in our portfolio, our successful history of obtaining debt financings and our current financing metrics, we believe it is probable that we can obtain new debt financing that will allow us satisfy the 2025 unsecured notes as they become due. We have also engaged Moelis & Company LLC as our financial advisor to assist in evaluating our options to address our upcoming debt maturities.
v3.24.0.1
Fair Value of Assets and Liabilities
12 Months Ended
Dec. 31, 2023
Fair Value Disclosures [Abstract]  
Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities
The following table presents certain of our assets measured at fair value at December 31, 2023, categorized by level of inputs as defined in the fair value hierarchy under GAAP, used in the valuation of each asset:
Fair Value at Reporting Date Using
DescriptionTotalQuoted Prices in Active Markets for Identical Assets (Level 1)Significant Other Observable Inputs (Level 2)Significant Unobservable Inputs (Level 3)
Non-recurring Fair Value Measurements Assets
Assets of properties held for sale (1)
$39,000 $— $39,000 $— 
(1)We recorded an impairment charge of $11,299 to reduce the carrying value of one property in our consolidated balance sheet to its estimated fair value less estimated costs to sell of $1,777, based on a negotiated sales price with a third party buyer (Level 2 input as defined in the fair value hierarchy under GAAP). See Note 4 for more information.
We recorded an impairment charge of $19,183 to fully write off our equity method investment in our 1750 H NW joint venture, based on our estimates of fair value of the investment which reflects implied pricing based on ongoing negotiations with the lender to this joint venture regarding the property (a Level 3 input as defined in the fair value hierarchy under GAAP). See Note 4 for more information.
In addition to the assets described above, our financial instruments include our cash and cash equivalents, restricted cash, rents receivable, accounts payable, a revolving credit facility, senior notes, mortgage notes payable, amounts due to related persons, other accrued expenses and security deposits. At December 31, 2023 and 2022, the fair values of our financial instruments approximated their carrying values in our consolidated financial statements, due to their short term nature or floating interest rates, except as follows:
 As of December 31, 2023As of December 31, 2022
Financial Instrument
Carrying Value(1)
Fair Value
Carrying Value(1)
Fair Value
Senior unsecured notes, 4.25% interest rate, due in 2024
$349,144 $331,510 $346,863 $331,601 
Senior unsecured notes, 4.50% interest rate, due in 2025
646,266 510,445 642,818 589,388 
Senior unsecured notes, 2.650% interest rate, due in 2026
298,464 185,934 297,839 232,770 
Senior unsecured notes, 2.400% interest rate, due in 2027
348,086 196,147 347,466 256,606 
Senior unsecured notes, 3.450% interest rate, due in 2031
396,614 199,060 396,178 268,004 
Senior unsecured notes, 6.375% interest rate, due in 2050
156,904 83,916 156,711 113,075 
Mortgage notes payable (2)(3)
172,131 179,813 49,917 49,099 
Total $2,367,609 $1,686,825 $2,237,792 $1,840,543 
(1)Includes unamortized debt premiums, discounts and issuance costs totaling $21,711 and $24,208 as of December 31, 2023 and 2022, respectively.
(2)Balances as of December 31, 2022 include a mortgage note secured by one property with an outstanding principal balance of $50,000 that was repaid in June 2023.
(3)Balances as of December 31, 2023 include six mortgage notes issued during the year ended December 31, 2023 with an aggregate principal balance of $177,320.
We estimated the fair values of our senior unsecured notes (except for our senior unsecured notes due 2050) using an average of the bid and ask price of the notes (Level 2 inputs as defined in the fair value hierarchy under GAAP) as of the measurement date. We estimated the fair values of our senior unsecured notes due 2050 based on the closing price on Nasdaq (Level 1 inputs as defined in the fair value hierarchy under GAAP) as of the measurement date. We estimated the fair values of our mortgage notes payable using discounted cash flow analyses and currently prevailing market rates (Level 3 inputs as defined in the fair value hierarchy under GAAP) as of the measurement date. Because Level 3 inputs are unobservable, our estimated fair values may differ materially from the actual fair values.
v3.24.0.1
Shareholders' Equity
12 Months Ended
Dec. 31, 2023
Equity [Abstract]  
Shareholders' Equity Shareholders’ Equity
Share Awards
We have common shares available for issuance under the terms of our Amended and Restated 2009 Incentive Share Award Plan, or the 2009 Plan. During the years ended December 31, 2023, 2022 and 2021, we awarded to our officers and other employees of RMR annual share awards of 210,300, 141,200 and 117,800 of our common shares, respectively, valued at $1,211, $2,470 and $2,994, in aggregate, respectively. We also awarded each of our then Trustees 3,500 of our common shares in each of 2023, 2022 and 2021 as part of their annual compensation. These awards had aggregate values of $249 ($28 per Trustee), $593 ($66 per Trustee) and $837 ($105 per Trustee) in 2023, 2022 and 2021, respectively. The values of the share awards were based upon the closing price of our common shares trading on Nasdaq on the date of award. The common shares awarded to our officers and certain other employees of RMR vest in five equal annual installments beginning on the date of award. The common shares awarded to our Trustees vest immediately. We recognize share forfeitures as they occur and include the value of awarded shares in general and administrative expenses ratably over the vesting period.
A summary of shares awarded, forfeited, vested and unvested under the terms of the 2009 Plan for the years ended December 31, 2023, 2022 and 2021, is as follows:
202320222021
Number of SharesWeighted Average Grant Date Fair ValueNumber of SharesWeighted Average Grant Date Fair ValueNumber of SharesWeighted Average Grant Date Fair Value
Unvested at beginning of year231,301 $21.47 182,224 $26.23 157,521 $29.26 
Awarded241,800 $6.04 172,700 $17.74 145,800 $26.28 
Forfeited (3,700)$17.31 (1,900)$25.97 (700)$25.97 
Vested(180,720)$16.00 (121,723)$23.24 (120,397)$30.24 
Unvested at end of year288,681 $12.01 231,301 $21.47 182,224 $26.23 
The 288,681 unvested shares as of December 31, 2023 are scheduled to vest as follows: 98,241 shares in 2024, 83,620 shares in 2025, 65,160 shares in 2026 and 41,660 shares in 2027. As of December 31, 2023, the estimated future compensation expense for the unvested shares was $3,042. The weighted average period over which the compensation expense will be recorded is approximately 23 months. During the years ended December 31, 2023, 2022 and 2021, we recorded $2,257, $2,905 and $2,868, respectively, of compensation expense related to the 2009 Plan. At December 31, 2023, 657,860 of our common shares remained available for issuance under the 2009 Plan.
Share Purchases
During the years ended December 31, 2023, 2022 and 2021, we purchased 48,329, 30,821 and 37,801 of our common shares, respectively, valued at weighted average share prices of $6.08, $17.54 and $26.55 per common share, respectively, from certain of our current and former Trustees and officers and certain current and former officers and employees of RMR in satisfaction of tax withholding and payment obligations in connection with the vesting of awards of our common shares.
Distributions
During the years ended December 31, 2023, 2022 and 2021, we paid distributions on our common shares as follows:
Annual Per Share DistributionTotal DistributionsCharacterization of Distributions
Year Return of CapitalOrdinary IncomeQualified Dividend
2023$1.30 $63,187 100.00%—%—%
2022$2.20 $106,630 62.68%37.32%—%
2021$2.20 $106,368 —%100.00%—%
On January 11, 2024, we declared a quarterly cash distribution payable to common shareholders of record on January 22, 2024 in the amount of $0.01 per share, or approximately $490. We expect to pay this distribution on or about February 15, 2024.
v3.24.0.1
SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION
12 Months Ended
Dec. 31, 2023
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]  
SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION
   Initial Cost to CompanyCosts Capitalized Subsequent to AcquisitionCost amount carried at Close of Period
PropertyLocationNumber of Properties
Encumbrances (1)
LandBuildings
and
Equipment
Impairments/
Writedowns
LandBuildings
and
Equipment
Total (2)
Accumulated
Depreciation
(3)
Date(s)
Acquired
Original
Construction
Date(s)
445 Jan Davis Drive Huntsville, AL 1$— $1,501 $1,492 $— $— $1,501 $1,492 $2,993 $(199)12/31/20182007
131 Clayton Street Montgomery, AL 1— 920 9,084 417 — 920 9,501 10,421 (2,957)6/22/20112007
4344 Carmichael Road Montgomery, AL 1— 1,374 11,658 571 — 1,374 12,229 13,603 (3,109)12/17/20132009
15451 North 28th Avenue Phoenix, AZ 1— 1,917 7,416 1,239 — 1,917 8,655 10,572 (2,016)9/10/20141996
711 S 14th Avenue Safford, AZ 1— 460 11,708 903 (4,440)364 8,267 8,631 (1,703)6/16/20101992
Regents Center Tempe, AZ 2— 4,121 3,042 354 — 4,121 3,396 7,517 (841)12/31/20181988
Campbell Place Carlsbad, CA 2— 5,769 3,871 7,595 — 5,769 11,466 17,235 (3,407)12/31/20182007
Folsom Corporate Center (5)
 Folsom, CA 1— 2,904 5,583 1,587 — 2,904 7,170 10,074 (1,238)12/31/20182008
Bayside Technology Park Fremont, CA 1— 10,784 648 255 — 10,784 903 11,687 (154)12/31/20181990
10949 N. Mather Boulevard Rancho Cordova, CA 1— 562 16,923 1,052 — 562 17,975 18,537 (4,675)10/30/20132012
11020 Sun Center Drive Rancho Cordova, CA 1— 1,466 8,797 1,543 — 1,466 10,340 11,806 (2,174)12/20/20161983
100 Redwood Shores Parkway Redwood City, CA 1— 14,454 7,721 — — 14,454 7,721 22,175 (1,071)12/31/20181993
3875 Atherton Road Rocklin, CA 1— 177 853 479 — 177 1,332 1,509 (140)12/31/20181991
801 K Street Sacramento, CA 1— 4,688 61,994 10,472 — 4,688 72,466 77,154 (15,524)1/29/20161989
9815 Goethe Road Sacramento, CA 1— 1,450 9,465 2,181 — 1,450 11,646 13,096 (3,400)9/14/20111992
Capitol Place Sacramento, CA 1— 2,290 35,891 8,674 — 2,290 44,565 46,855 (15,686)12/17/20091988
4560 Viewridge Road (5)
 San Diego, CA 1— 4,269 18,316 5,294 — 4,347 23,532 27,879 (14,798)3/31/19971996
2115 O’Nel Drive San Jose, CA 1— 12,305 5,062 385 — 12,305 5,447 17,752 (765)12/31/20181984
North First Street San Jose, CA 1— 8,311 4,003 443 — 8,311 4,446 12,757 (729)12/31/20181984
Rio Robles Drive San Jose, CA 38,064 23,687 13,698 17,061 — 23,687 30,759 54,446 (3,779)12/31/20181984
2500 Walsh Avenue Santa Clara, CA 1— 6,687 8,326 280 — 6,687 8,606 15,293 (1,181)12/31/20181982
3250 and 3260 Jay Street Santa Clara, CA 2— 19,899 14,051 114 — 19,899 14,165 34,064 (1,949)12/31/20181982
603 San Juan Avenue Stockton, CA 1— 563 5,470 206 — 563 5,676 6,239 (1,586)7/20/20122012
350 West Java Drive Sunnyvale, CA 1— 24,609 462 978 — 24,609 1,440 26,049 (148)12/31/20181984
7958 South Chester Street Centennial, CO 1— 6,682 7,153 1,801 — 6,682 8,954 15,636 (1,265)12/31/20182000
350 Spectrum Loop Colorado Springs, CO 1— 3,650 7,732 594 — 3,650 8,326 11,976 (1,205)12/31/20182000
12795 West Alameda Parkway Lakewood, CO 1— 2,640 23,777 1,508 — 2,640 25,285 27,925 (8,849)1/15/20101988
Corporate Center Lakewood, CO 3— 2,887 27,537 2,613 — 2,887 30,150 33,037 (15,398)10/11/20021980
11 Dupont Circle, NW Washington, DC 1— 28,255 44,743 19,249 — 28,255 63,992 92,247 (12,479)10/2/20171974
   Initial Cost to CompanyCosts Capitalized Subsequent to AcquisitionCost amount carried at Close of Period
PropertyLocationNumber of Properties
Encumbrances (1)
LandBuildings
and
Equipment
Impairments/
Writedowns
LandBuildings
and
Equipment
Total (2)
Accumulated
Depreciation
(3)
Date(s)
Acquired
Original
Construction
Date(s)
1211 Connecticut Avenue, NW Washington, DC 1— 30,388 24,667 4,855 — 30,388 29,522 59,910 (5,821)10/2/20171967
1401 K Street, NW Washington, DC 1— 29,215 34,656 8,485 — 29,215 43,141 72,356 (9,458)10/2/20171929
20 Massachusetts Avenue Washington, DC 1— 12,009 51,527 221,203 — 12,231 272,508 284,739 (48,475)3/31/19971996
440 First Street, NW (5)
 Washington, DC 1— 27,903 38,624 2,169 — 27,903 40,793 68,696 (6,341)10/2/20171982
625 Indiana Avenue Washington, DC 1— 26,000 25,955 12,158 — 26,000 38,113 64,113 (12,464)8/17/20101989
840 First Street, NE Washington, DC 1— 42,727 73,278 2,912 — 42,727 76,190 118,917 (12,414)10/2/20172003
10350 NW 112th Avenue Miami, FL 1— 4,798 2,757 2,354 — 4,798 5,111 9,909 (684)12/31/20182002
7850 Southwest 6th Court Plantation, FL 1— 4,800 30,592 14,993 — 4,800 45,585 50,385 (9,839)5/12/20111999
8900 Grand Oak Circle Tampa, FL 1— 1,100 11,773 1,661 — 1,100 13,434 14,534 (4,219)10/15/20101994
180 Ted Turner Drive SW (5)
 Atlanta, GA 1— 5,717 20,017 1,390 — 5,717 21,407 27,124 (5,989)7/25/20122007
1224 Hammond Drive Atlanta, GA 1— 13,040 135,459 11,583 — 13,040 147,042 160,082 (10,789)6/25/20212020
Corporate Square Atlanta, GA 5— 3,996 29,763 26,570 — 3,996 56,333 60,329 (21,009)7/16/20041967
Executive Park Atlanta, GA 1— 1,521 11,826 4,123 — 1,521 15,949 17,470 (9,089)7/16/20041972
One Georgia Center (5)
 Atlanta, GA 1— 10,250 27,933 20,903 — 10,250 48,836 59,086 (13,865)9/30/20111968
One Primerica Parkway (4)
 Duluth, GA 125,904 6,927 22,951 40 — 6,927 22,991 29,918 (3,181)12/31/20182013
4712 Southpark Boulevard Ellenwood, GA 1— 1,390 19,635 911 — 1,390 20,546 21,936 (5,707)7/25/20122005
8305 NW 62nd Avenue Johnston, IA 1— 2,649 7,997 — — 2,649 7,997 10,646 (1,108)12/31/20182011
1185, 1249 & 1387 S. Vinnell Way Boise, ID 3— 3,390 29,026 1,246 — 3,390 30,272 33,662 (8,663)9/11/20121996; 1997; 2002
2020 S. Arlington Heights (5)
 Arlington Heights, IL 1— 1,450 13,588 2,129 — 1,450 15,717 17,167 (5,138)12/29/20091988
1000 W. Fulton (5)
 Chicago, IL 1— 42,935 252,914 528 — 42,935 253,442 296,377 (21,274)6/24/20212015
HUB 1415 Naperville, IL 1— 12,333 20,586 23,564 — 12,333 44,150 56,483 (7,248)12/31/20182001
7601 and 7635 Interactive Way Indianapolis, IN 2— 3,337 14,522 34 — 3,337 14,556 17,893 (1,900)12/31/20182003
Intech Park Indianapolis, IN 3— 4,170 69,759 12,052 — 4,170 81,811 85,981 (26,133)10/14/20112000; 2001; 2008
7125 Industrial Road Florence, KY 1— 1,698 11,722 293 — 1,698 12,015 13,713 (3,349)12/31/20121980
251 Causeway Street Boston, MA 3— 26,851 36,756 5,296 — 26,851 42,052 68,903 (9,174)8/17/20101987
330 Billerica Road Chelmsford, MA 1— 2,477 — 10,246 — 2,477 10,246 12,723 (1,924)12/31/20181984
75 Pleasant Street Malden, MA 1— 1,050 31,086 275 — 1,050 31,361 32,411 (10,636)5/24/20102008
25 Newport Avenue Quincy, MA 1— 2,700 9,199 3,106 — 2,700 12,305 15,005 (3,572)2/16/20111985
   Initial Cost to CompanyCosts Capitalized Subsequent to AcquisitionCost amount carried at Close of Period
PropertyLocationNumber of Properties
Encumbrances (1)
LandBuildings
and
Equipment
Impairments/
Writedowns
LandBuildings
and
Equipment
Total (2)
Accumulated
Depreciation
(3)
Date(s)
Acquired
Original
Construction
Date(s)
314 Littleton Road Westford, MA 1— 5,691 8,487 100 — 5,691 8,587 14,278 (1,201)12/31/20182007
Annapolis Commerce Center Annapolis, MD 2— 4,057 7,665 4,806 — 4,057 12,471 16,528 (2,241)10/2/20171989
4201 Patterson Avenue Baltimore, MD 1— 901 8,097 4,134 (85)893 12,154 13,047 (7,198)10/15/19981989
7001 Columbia Gateway Drive Columbia, MD 1— 5,642 10,352 3,444 — 5,642 13,796 19,438 (1,605)12/31/20182008
Hillside Center Columbia, MD 2— 3,437 4,228 1,015 — 3,437 5,243 8,680 (1,098)10/2/20172001
TenThreeTwenty Columbia, MD 1— 3,126 16,361 4,011 — 3,126 20,372 23,498 (3,418)10/2/20171982
3300 75th Avenue Landover, MD 129,537 4,110 36,371 3,730 — 4,110 40,101 44,211 (13,789)2/26/20101985
Redland 520/530 Rockville, MD 3— 12,714 61,377 8,002 — 12,714 69,379 82,093 (11,313)10/2/20172008
Redland 540 Rockville, MD 1— 10,740 17,714 6,108 — 10,740 23,822 34,562 (5,344)10/2/20172003
3550 Green Court Ann Arbor, MI 1— 3,630 4,857 — — 3,630 4,857 8,487 (714)12/31/20181998
11411 E. Jefferson Avenue Detroit, MI 1— 630 18,002 586 — 630 18,588 19,218 (6,322)4/23/20102009
Rosedale Corporate Plaza Roseville, MN 1— 672 6,045 819 — 672 6,864 7,536 (3,917)12/1/19991987
1300 Summit Street Kansas City, MO 1— 2,776 12,070 925 — 2,776 12,995 15,771 (3,690)9/27/20121998
2555 Grand Boulevard (5)
 Kansas City, MO 1— 4,209 51,522 5,414 — 4,209 56,936 61,145 (8,213)12/31/20182003
4241 NE 34th Street Kansas City, MO 1— 1,133 5,649 5,056 — 1,470 10,368 11,838 (5,455)3/31/19971995
1220 Echelon Parkway Jackson, MS 114,510 440 25,458 1,571 — 440 27,029 27,469 (7,500)7/25/20122009
2300 and 2400 Yorkmont Road (5)
 Charlotte, NC 2— 1,334 19,075 4,222 — 1,334 23,297 24,631 (3,549)12/31/20181995
18010 and 18020 Burt Street Omaha, NE 2— 6,977 12,500 2,369 — 6,977 14,869 21,846 (1,733)12/31/20182012
500 Charles Ewing Boulevard Ewing, NJ 142,279 4,808 26,002 1,554 — 4,808 27,556 32,364 (3,737)12/31/20182012
299 Jefferson Road Parsippany, NJ 1— 4,543 2,914 1,282 — 4,543 4,196 8,739 (723)12/31/20182011
One Jefferson Road Parsippany, NJ 1— 4,415 5,249 103 — 4,415 5,352 9,767 (741)12/31/20182009
Airline Corporate Center Colonie, NY 1— 790 6,400 1,876 — 790 8,276 9,066 (2,239)6/22/20122004
1212 Pittsford - Victor Road Pittsford, NY 1— 608 78 1,627 — 608 1,705 2,313 (174)12/31/20181965
2231 Schrock Road Columbus, OH 1— 716 217 578 — 716 795 1,511 (163)12/31/20181999
8800 Tinicum Boulevard Philadelphia, PA 1— 5,573 22,686 6,022 — 5,573 28,708 34,281 (3,658)12/31/20182000
446 Wrenplace Road Fort Mill, SC 1— 5,031 22,524 43 — 5,031 22,567 27,598 (1,704)12/22/20202019
9680 Old Bailes Road Fort Mill, SC 1— 834 2,944 91 — 834 3,035 3,869 (423)12/31/20182007
16001 North Dallas Parkway Addison, TX 2— 10,282 63,071 2,558 — 10,282 65,629 75,911 (9,485)12/31/20181987
   Initial Cost to CompanyCosts Capitalized Subsequent to AcquisitionCost amount carried at Close of Period
PropertyLocationNumber of Properties
Encumbrances (1)
LandBuildings
and
Equipment
Impairments/
Writedowns
LandBuildings
and
Equipment
Total (2)
Accumulated
Depreciation
(3)
Date(s)
Acquired
Original
Construction
Date(s)
Research Park Austin, TX 2— 4,258 13,747 534 — 4,258 14,281 18,539 (3,403)12/31/20181999
10451 Clay Road Houston, TX 1— 5,495 10,253 2,432 — 5,495 12,685 18,180 (1,809)12/31/20182013
202 North Castlegory Road Houston, TX 1— 863 5,024 41 — 863 5,065 5,928 (657)12/31/20182016
4221 W. John Carpenter Freeway Irving, TX 1— 1,413 2,365 1,843 — 1,413 4,208 5,621 (1,445)12/31/20181995
8675,8701-8711 Freeport Pkwy and 8901 Esters Boulevard Irving, TX 3— 12,970 31,566 138 — 12,970 31,704 44,674 (4,375)12/31/20181990
1511 East Common Street New Braunfels, TX 1— 4,965 1,266 251 — 4,965 1,517 6,482 (323)12/31/20182005
2900 West Plano Parkway Plano, TX 1— 6,819 8,831 — — 6,819 8,831 15,650 (1,224)12/31/20181998
3400 West Plano Parkway Plano, TX 1— 4,543 15,964 321 — 4,543 16,285 20,828 (2,286)12/31/20181994
3600 Wiseman Boulevard San Antonio, TX 1— 3,493 6,662 2,134 — 3,493 8,796 12,289 (1,059)12/31/20182004
701 Clay Road (4)
 Waco, TX 125,903 2,030 8,708 14,651 — 2,060 23,329 25,389 (9,787)12/23/19971997
1800 Novell Place Provo, UT 1— 7,487 43,487 13,364 — 7,487 56,851 64,338 (7,307)12/31/20182000
4885-4931 North 300 West Provo, UT 2— 3,915 9,429 21 — 3,915 9,450 13,365 (1,392)12/31/20182009
14660, 14672 & 14668 Lee Road (5)
 Chantilly, VA 3— 6,966 74,214 17,518 — 6,966 91,732 98,698 (15,123)12/22/20161998; 2002; 2006
Enterchange at Meadowville Chester, VA 1— 1,478 9,594 1,369 — 1,478 10,963 12,441 (2,720)8/28/20131999
7987 Ashton Avenue Manassas, VA 1— 1,562 8,253 1,069 — 1,562 9,322 10,884 (1,946)1/3/20171989
Two Commercial Place Norfolk, VA 1— 4,494 21,508 1,033 — 4,494 22,541 27,035 (2,976)12/31/20181974
1759 Business Center Drive Reston, VA 1— 4,033 28,517 2,517 — 4,033 31,034 35,067 (7,563)5/28/20141987
1760 Business Center Drive Reston, VA 1— 5,033 50,141 6,320 — 5,033 56,461 61,494 (13,571)5/28/20141987
1775 Wiehle Avenue Reston, VA 1— 4,138 26,120 5,716 — 4,138 31,836 35,974 (5,376)10/2/20172001
9201 Forest Hill Avenue Richmond, VA 1— 1,344 375 668 — 1,344 1,043 2,387 (239)12/31/20181985
9960 Mayland Drive Richmond, VA 1— 2,614 15,930 4,690 — 2,614 20,620 23,234 (5,109)5/20/20141994
1751 Blue Hills Drive (5)
 Roanoke, VA 1— 2,689 7,761 — — 2,689 7,761 10,450 (1,076)12/31/20182003
Atlantic Corporate Park Sterling, VA 2— 5,752 29,316 3,616 — 5,752 32,932 38,684 (5,532)10/2/20172008
Orbital Sciences Campus (5)
 Sterling, VA 3— 12,275 19,320 7,400 — 12,269 26,726 38,995 (3,205)12/31/20182001
Sterling Park Business Center Sterling, VA 125,934 5,871 44,324 127 — 5,871 44,451 50,322 (6,951)10/2/20172016
65 Bowdoin Street S. Burlington, VT 1— 700 8,416 148 — 700 8,564 9,264 (2,959)4/9/20102009
Stevens Center (5)
 Richland, WA 2— 3,970 17,035 4,776 — 4,042 21,739 25,781 (13,025)3/31/19971995
Unison Elliott Bay-Lab Space Seattle, WA 2— 17,316 34,281 137,343 — 17,316 171,624 188,940 (5,302)12/31/20182000
Unison Elliott Bay-Office Space Seattle, WA 1— 9,324 18,459 5,101 — 9,324 23,560 32,884 (2,953)12/31/20182000
   Initial Cost to CompanyCosts Capitalized Subsequent to AcquisitionCost amount carried at Close of Period
PropertyLocationNumber of Properties
Encumbrances (1)
LandBuildings
and
Equipment
Impairments/
Writedowns
LandBuildings
and
Equipment
Total (2)
Accumulated
Depreciation
(3)
Date(s)
Acquired
Original
Construction
Date(s)
5353 Yellowstone Road (5)
 Cheyenne, WY 1— 1,915 8,217 2,402 — 1,950 10,584 12,534 (6,251)3/31/19971995
151$172,131 $785,646 $2,492,042 $792,516 $(4,525)$786,310 $3,279,369 $4,065,679 $(650,179)
Properties Held for Sale
400 South Jefferson Street
 Chicago, IL 1— 19,379 20,115 1,136 (11,299)13,555 15,776 29,331 (3,030)12/31/20181947
1— 19,379 20,115 1,136 (11,299)13,555 15,776 29,331 (3,030)
152$172,131 $805,025 $2,512,157 $793,652 $(15,824)$799,865 $3,295,145 $4,095,010 $(653,209)
(1) Represents mortgage debt, net of the unamortized balance of debt issuance costs totaling $5,189.
(2) Excludes the value of real estate intangibles. Aggregate cost for federal income tax purposes is approximately $7,540,917.
(3) Depreciation on building and improvements is provided for periods ranging up to 40 years and on equipment up to seven years.
(4) These two properties are collateral for our $54,300 mortgage note.
(5) These 19 properties (with the exception of 14660 Lee Road) are collateral for our $325,000 secured revolving credit facility and $100,000 term loan under our amended and restated credit facility, which we entered into in January 2024.
An analysis of the carrying amount of real estate properties and accumulated depreciation is as follows:
 Real Estate PropertiesAccumulated Depreciation
Balance at December 31, 2020$3,522,143 $451,914 
Additions584,805 92,266 
Loss on asset impairment(58,696)— 
Disposals(72,137)(8,675)
Cost basis adjustment (1)
(37,239)(37,239)
Reclassification of assets of properties held for sale(27,790)(2,354)
Balance at December 31, 20213,911,086 495,912 
Additions222,951 96,966 
Loss on asset impairment(17,303)— 
Disposals(173,841)(26,997)
Cost basis adjustment (1)
(4,235)(4,235)
Reclassification of assets of properties held for sale(2,584)(188)
Balance at December 31, 20223,936,074 561,458 
Additions221,246 107,460 
Loss on asset impairment(11,299)— 
Disposals(51,011)(15,709)
Reclassification of assets of properties held for sale(29,331)(3,030)
Balance at December 31, 2023$4,065,679 $650,179 
(1)    Represents the reclassification between accumulated depreciation and building made to certain properties reclassified as assets of properties held for sale at fair value less costs to sell in accordance with GAAP.
v3.24.0.1
Pay vs Performance Disclosure - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Pay vs Performance Disclosure      
Net Income (Loss) $ (69,432) $ (6,109) $ (8,180)
v3.24.0.1
Insider Trading Arrangements
3 Months Ended
Dec. 31, 2023
Trading Arrangements, by Individual  
Rule 10b5-1 Arrangement Adopted false
Non-Rule 10b5-1 Arrangement Adopted false
Rule 10b5-1 Arrangement Terminated false
Non-Rule 10b5-1 Arrangement Terminated false
v3.24.0.1
Summary of Significant Accounting Policies (Policies)
12 Months Ended
Dec. 31, 2023
Accounting Policies [Abstract]  
Basis of Presentation
Basis of Presentation. These consolidated financial statements include the accounts of us and our subsidiaries, all of which are wholly owned directly or indirectly by us. All intercompany transactions and balances with or among our consolidated subsidiaries have been eliminated.
Real Estate Properties
Real Estate Properties. We record our properties at cost and provide depreciation on real estate investments on a straight line basis over estimated useful lives generally ranging from 7 to 40 years. In some circumstances, we engage independent real estate appraisal firms to provide market information and evaluations which are relevant to our purchase price allocations and determinations of useful lives; however, we are ultimately responsible for the purchase price allocations and determinations of useful lives.
We allocate the purchase prices of our properties to land, buildings and improvements based on determinations of the relative fair values of these assets assuming the properties are vacant. We determine the fair value of each property using methods similar to those used by independent appraisers, which may involve estimated cash flows that are based on a number of factors, including capitalization rates and discount rates, among others. We allocate a portion of the purchase price of our properties to above market and below market leases based on the present value (using an interest rate which reflects the risks associated with acquired in place leases at the time each property was acquired by us) of the difference, if any, between (i) the contractual amounts to be paid pursuant to the acquired in place leases and (ii) our estimates of fair market lease rates for the corresponding leases, measured over a period equal to the terms of the respective leases. We allocate a portion of the purchase price to acquired in place leases and tenant relationships based upon market estimates to lease up the property based on the leases in place at the time of purchase. We allocate this aggregate value between acquired in place lease values and tenant relationships based on our evaluation of the specific characteristics of each tenant’s lease. However, we have not separated the value of tenant relationships from the value of acquired in place leases because such value and related amortization expense is immaterial to the accompanying consolidated financial statements. In making these allocations, we consider factors such as estimated carrying costs during the expected lease up periods, including real estate taxes, insurance and other operating income and expenses and costs, such as leasing commissions, legal and other related expenses, to execute similar leases in current market conditions at the time a property was acquired by us. If the value of tenant relationships becomes material in the future, we may separately allocate those amounts and amortize the allocated amounts over the estimated life of the relationships. For transactions that qualify as business combinations, we allocate the excess, if any, of the consideration over the fair value of the assets acquired to goodwill.
We amortize capitalized above market lease values (included in acquired real estate leases, net in our consolidated balance sheets) and below market lease values (presented as assumed real estate lease obligations, net in our consolidated balance sheets) as a reduction or increase, respectively, to rental income over the terms of the associated leases. Such amortization resulted in a net increase to rental income of $252 during the year ended December 31, 2023 and net decreases to rental income of $975 and $2,288 during the years ended December 31, 2022 and 2021, respectively. We amortize the value of acquired in place leases (included in acquired real estate leases, net in our consolidated balance sheets), exclusive of the value of above market and below market acquired in place leases, over the terms of the associated leases. Such amortization, which is included in depreciation and amortization expense, amounted to $93,057, $118,728 and $142,538 during the years ended December 31, 2023, 2022 and 2021, respectively. If a lease is terminated prior to its stated expiration, we write off the unamortized amounts relating to that lease.
We regularly evaluate whether events or changes in circumstances have occurred that could indicate an impairment in the value of long lived assets. Impairment indicators may include declining tenant occupancy, lack of progress releasing vacant space, tenant bankruptcies, low long term prospects for improvement in property performance, weak or declining tenant profitability, cash flow or liquidity, our decision to dispose of an asset before the end of its estimated useful life and legislative, market or industry changes that could permanently reduce the value of a property. If there is an indication that the carrying value of an asset is not recoverable, we estimate the projected undiscounted cash flows to determine if an impairment loss should be recognized. The future net undiscounted cash flows are subjective and are based in part on assumptions regarding hold periods, market rents and terminal capitalization rates. We determine the amount of any impairment loss by comparing the historical carrying value to estimated fair value. We estimate fair value through an evaluation of recent financial performance and projected discounted cash flows using standard industry valuation techniques. In addition to consideration of impairment upon the events or changes in circumstances described above, we regularly evaluate the remaining useful lives of our long lived assets. If we change our estimate of the remaining useful lives, we allocate the carrying value of the affected assets over their revised remaining useful lives.
Cash and Cash Equivalents
Cash and Cash Equivalents. We consider highly liquid investments with original maturities of three months or less at the date of purchase to be cash equivalents.
Restricted Cash
Restricted Cash. Restricted cash consists of amounts escrowed for future real estate taxes, insurance, leasing costs, capital expenditures and debt service, as required by certain of our mortgage debts.
Deferred Leasing Costs Deferred Leasing Costs. Deferred leasing costs include brokerage costs and inducements associated with our entering leases. We amortize deferred leasing costs, which are included in depreciation and amortization expense, and inducements, which are included as a reduction to rental income, on a straight line basis over the terms of the respective leases. Legal costs associated with the execution of our leases are expensed as incurred and included in general and administrative expenses in our consolidated statements of comprehensive income (loss).
Debt Issuance Costs Debt Issuance Costs. Costs related to the issuance or assumption of debt are capitalized and amortized to interest expense over the terms of the respective loans. Debt issuance costs, net of accumulated amortization, for our prior $750,000 unsecured revolving credit facility, or our prior revolving credit facility, are included in other assets in our consolidated balance sheets. As of December 31, 2023 and 2022, debt issuance costs for our prior revolving credit facility were $5,328 and $4,593, respectively, and accumulated amortization of debt issuance costs for our prior revolving credit facility were $5,240 and $4,072, respectively. Debt issuance costs, net of accumulated amortization, for our senior unsecured notes and mortgage notes payable are presented as a direct deduction from the associated debt liability in our consolidated balance sheets.
Equity Method Investments
Equity Method Investments. As of December 31, 2023, we had noncontrolling ownership interests of 51% and 50% in two unconsolidated joint ventures that owned three properties. The properties owned by these joint ventures are encumbered by an aggregate of $82,000 of mortgage indebtedness. We did not control the activities that are most significant to these joint ventures and, as a result, we accounted for our investments in these joint ventures under the equity method of accounting. See Note 4 for more information regarding our unconsolidated joint ventures.
We periodically evaluate our equity method investments for possible indicators of other than temporary impairment whenever events or changes in circumstances indicate the carrying amount of the investment might not be recoverable. These indicators may include the length of time and the extent to which the market value of our investment is below our carrying value, the financial condition of our investees, our intent and ability to be a long term holder of the investment and other considerations. If the decline in fair value is judged to be other than temporary, we record an impairment charge to adjust the basis of the investment to its estimated fair value.
Revenue Recognition
Revenue Recognition. We are a lessor of commercial office properties. Our leases provide our tenants with the contractual right to use and economically benefit from all of the physical space specified in the leases; therefore, we have determined to evaluate our leases as lease arrangements.
Our leases provide for base rent payments and in addition may include variable payments. Rental income from operating leases, including any payments derived by index or market-based indices, is recognized on a straight line basis over the lease term when we have determined that the collectability of substantially all of the lease payments is probable. Some of our leases have options to extend or terminate the lease exercisable at the option of our tenants, which are considered when determining the lease term. Allowances for bad debts are recognized as a direct reduction of rental income.
Certain of our leases contain non-lease components, such as property level operating expenses and capital expenditures reimbursed by our tenants as well as other required lease payments. We have made the policy election to not separate the lease and non-lease components because (i) the lease components are operating leases and (ii) the timing and pattern of recognition of the non-lease components are the same as those of the lease components. We apply Accounting Standards Codification 842, Leases, to the combined component. Income derived by our leases is recorded in rental income in our consolidated statements of comprehensive income (loss).
Certain tenants are obligated to pay directly their obligations under their leases for insurance, real estate taxes and certain other expenses. These obligations, which have been assumed by the tenants under the terms of their respective leases, are not reflected in our consolidated financial statements. To the extent any tenant responsible for any such obligations under the applicable lease defaults on such lease or if it is deemed probable that the tenant will fail to pay for such obligations, we would record a liability for such obligations. See Note 5 for more information regarding our leases.
Income Taxes Income Taxes. We have elected to be taxed as a REIT under the United States Internal Revenue Code of 1986, as amended, and, accordingly, we generally will not be subject to federal income taxes provided we distribute our taxable income and meet certain other requirements to qualify for taxation as a REIT. We are, however, subject to certain state and local taxes.
Per Common Share Amounts
Per Common Share Amounts. We calculate basic earnings per common share using the two class method. We calculate diluted earnings per share using the more dilutive of the two class method or the treasury stock method. Unvested share awards and other potentially dilutive common shares, together with the related impact on earnings, are considered when calculating diluted earnings per share.
Use of Estimates
Use of Estimates. Preparation of these financial statements in conformity with GAAP requires us to make estimates and assumptions that may affect the amounts reported in these consolidated financial statements and related notes. The actual results could differ from these estimates. Significant estimates in the consolidated financial statements include purchase price allocations, useful lives of fixed assets and assessment of impairment of real estate and the related intangibles.
Segment Reporting
Segment Reporting. We operate in one business segment: direct ownership of real estate properties.
New Accounting Pronouncements
New Accounting Pronouncements. On November 27, 2023, the Financial Accounting Standards Board issued Accounting Standards Update No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, or ASU No. 2023-07, which requires public entities to: (i) provide disclosures of significant segment expenses and other segment items if they are regularly provided to the Chief Operating Decision Maker, or the CODM, and included in each reported measure of segment profit or loss; (ii) provide all annual disclosures about a reportable segment’s profit or loss and assets currently required by Accounting Standards Codification 280, Segment Reporting, or ASC 280, in interim periods; and (iii) disclose the CODM’s title and position, as well as an explanation of how the CODM uses the reported measures and other disclosures. Public entities with a single reportable segment must apply all the disclosure requirements of ASU No. 2023-07, as well as all the existing segment disclosures under ASC 280. The amendments in ASU No. 2023-07 are incremental to the requirements in ASC 280 and do not change how a public entity identifies its operating segments, aggregates those operating segments, or applies the quantitative thresholds to determine its reportable segments. ASU No. 2023-07 should be applied retrospectively to all prior periods presented in the financial statements and is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. We are currently evaluating the impact ASU No. 2023-07 will have on our consolidated financial statements and disclosures.
v3.24.0.1
Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2023
Accounting Policies [Abstract]  
Schedule of Real Estate Properties
As of December 31, 2023 and 2022, our acquired real estate leases and assumed real estate lease obligations, excluding properties classified as held for sale, were as follows:
 December 31,
20232022
Acquired real estate leases:
Capitalized above market lease values$14,758 $15,792 
Less: accumulated amortization(10,876)(9,672)
Capitalized above market lease values, net3,882 6,120 
Lease origination value572,766 728,773 
Less: accumulated amortization(313,150)(365,560)
Lease origination value, net259,616 363,213 
Acquired real estate leases, net$263,498 $369,333 
Assumed real estate lease obligations:
Capitalized below market lease values$25,678 $27,033 
Less: accumulated amortization(14,013)(12,876)
Assumed real estate lease obligations, net$11,665 $14,157 
v3.24.0.1
Per Common Share Amounts (Tables)
12 Months Ended
Dec. 31, 2023
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The calculation of basic and diluted earnings per share is as follows (amounts in thousands, except per share amounts):
Year Ended December 31,
202320222021
Numerators:
Net loss$(69,432)$(6,109)$(8,180)
Income attributable to unvested participating securities(305)(427)— 
Net loss used in calculating earnings per share$(69,737)$(6,536)$(8,180)
Denominators:
Weighted average common shares outstanding - basic and diluted (1)
48,389 48,278 48,195 
Net loss per common share - basic and diluted$(1.44)$(0.14)$(0.17)
(1)For the years ended December 31, 2023, 2022 and 2021, there were no dilutive common shares. For the year ended December 31, 2021, 34 unvested common shares were not included in the calculation of diluted earnings per share because to do so would have been antidilutive.
v3.24.0.1
Real Estate Properties (Tables)
12 Months Ended
Dec. 31, 2023
Real Estate [Abstract]  
Schedule of Business Acquisitions, by Acquisition We allocated the purchase prices of these acquisitions based on the relative estimated fair values of the acquired assets and assumed liabilities as follows:
Acquisition DateLocationNumber of PropertiesRentable Square FeetPurchase PriceLandBuildings and ImprovementsAcquired Real Estate LeasesAssumed Real Estate Lease Obligations
June 2021
Chicago, IL (1)
1531,000 $368,331 $42,935 $258,348 $76,136 $(9,088)
June 2021Atlanta, GA1346,000 180,602 13,040 135,459 32,103 — 
August 2021Boston, MA149,000 27,545 16,103 10,217 1,225 — 
3926,000$576,478 $72,078 $404,024 $109,464 $(9,088)
(1)Purchase price includes an adjustment of $13,031 to record an estimated real estate tax liability as of the acquisition date.
Schedule of Disposal Groups
Date of SaleNumber of Properties LocationRentable Square Feet
Gross
 Sales Price (1)
Gain (Loss) on Sale of Real Estate
January 20233
Richmond, VA (2)
89,000 $5,350 $2,548 
April 20231Phoenix, AZ107,000 4,900 511 
June 20231Vernon Hills, IL100,000 2,825 (2,816)
September 20231Windsor Mill, MD80,000 10,500 244 
October 20231Santa Clara, CA66,000 16,049 705 
November 20231Chelmsford, MA111,000 5,250 2,588 
8553,000 $44,874 $3,780 
(1)Gross sales price is the gross contract price, excluding closing costs.
(2)Properties were classified as held for sale as of December 31, 2022.
Date of SaleNumber of Properties LocationRentable Square Feet
Gross
 Sales Price (1)
Gain (Loss) on Sale of Real EstateLoss on Impairment of Real Estate
January 20221
Rockville, MD (2)
129,000 $6,750 $(72)$— 
February 20222
Chesapeake, VA (2)
172,000 18,945 2,296 — 
March 20221
Milwaukee, WI (2)
29,000 3,775 (75)— 
May 20221Holtsville, NY264,000 28,500 1,900 — 
June 20221Fairfax, VA184,000 19,750 (13,537)— 
July 20221Houston, TX206,000 9,800 (135)15,278 
August 20223Birmingham, AL448,000 16,050 (265)3,709 
August 20221Erlanger, KY86,000 2,600 135 2,184 
September 20222Chesapeake, VA214,000 24,000 62649
September 20222Everett, WA112,000 31,500 11,959
September 20221Salem, OR233,000 34,250 5,369
November 20221
Kapolei, HI (3)
109,000 4,000 2,504
November 20221Englewood, CO140,000 11,100 860
182,326,000$211,020 $11,001 $21,820 
(1)Gross sales price is the gross contract price, excluding closing costs.
(2)Properties were classified as held for sale as of December 31, 2021.
(3)Property is a leasable land parcel.
Date of SaleNumber of Properties LocationRentable Square Feet
Gross
 Sales Price (1)
Gain (Loss) on Sale of Real EstateLoss on Impairment of Real Estate
January 2021
Kansas City, MO (2)(3)
10,000 $845 $(63)$— 
January 20211
Richmond, VA (2)
311,000 130,000 54,181 — 
April 20211Huntsville, AL1,371,000 39,000 — 5,383 
July 20211Fresno, CA532,000 6,000 — 33,902 
July 20211Liverpool, NY38,000 650 31 — 
August 20211Memphis, TN205,000 15,270 287 — 
September 20211Stoneham, MA98,000 6,650 (282)5,911 
October 2021
Sterling, VA (4)
— 28,500 24,200 — 
62,565,000 $226,915 $78,354 $45,196 
(1)Gross sales price is the gross contract price, excluding closing costs.
(2)Properties were classified as held for sale as of December 31, 2020.
(3)Consists of a warehouse facility.
(4)Consists of two vacant land parcels.
Schedule of Joint Ventures As of December 31, 2023 and 2022, our investments in unconsolidated joint ventures consisted of the following:
OPI OwnershipOPI Carrying Value of Investments at December 31, Number of PropertiesLocationRentable Square Feet
Joint Venture20232022
Prosperity Metro Plaza51%$18,128 $19,237 2Fairfax, VA346,000
1750 H Street, NW50%— 15,892 1Washington, D.C.122,000
Total $18,128 $35,129 3468,000
The following table provides a summary of the mortgage debt of our two unconsolidated joint ventures:
Joint Venture
Interest Rate (1)
Maturity Date
Principal Balance at December 31, 2023 and 2022 (2)
Prosperity Metro Plaza4.09%12/1/2029$50,000 
1750 H Street, NW (3)
3.69%8/1/202732,000 
Weighted Average/Total3.93%$82,000 
(1)Includes the effect of mark to market purchase accounting.
(2)Reflects the entire balance of the debt secured by the properties and is not adjusted to reflect the interests in the joint ventures we did not own. None of the debt is recourse to us.
(3)In July 2023, the maturity date of this mortgage loan was extended by three years at the same interest rate.
v3.24.0.1
Leases (Tables)
12 Months Ended
Dec. 31, 2023
Leases [Abstract]  
Schedule of Future Contractual Lease Payments to be Received
The following operating lease maturity analysis presents the future contractual lease payments to be received by us through 2053 as of December 31, 2023:
YearAmount
2024$378,748 
2025339,500 
2026310,205 
2027281,109 
2028243,928 
Thereafter1,428,379 
Total$2,981,869 
v3.24.0.1
Indebtedness (Tables)
12 Months Ended
Dec. 31, 2023
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt Instruments
As of December 31, 2023 and 2022, our outstanding indebtedness consisted of the following:
 December 31,
20232022
Revolving credit facility, due in 2024$205,000 $195,000 
Mortgage note payable, 3.700% interest rate, due in 2023 (1)
— 50,000 
Senior unsecured notes, 4.250% interest rate, due in 2024
350,000 350,000 
Senior unsecured notes, 4.500% interest rate, due in 2025
650,000 650,000 
Senior unsecured notes, 2.650% interest rate, due in 2026
300,000 300,000 
Senior unsecured notes, 2.400% interest rate, due in 2027
350,000 350,000 
Mortgage note payable, 8.272% interest rate, due in 2028
42,700 — 
Mortgage note payable, 8.139% interest rate, due in 2028
26,340 — 
Mortgage note payable, 7.671% interest rate, due in 2028
54,300 — 
Senior unsecured notes, 3.450% interest rate, due in 2031
400,000 400,000 
Mortgage note payable, 7.210% interest rate, due in 2033
30,680 — 
Mortgage note payable, 7.305% interest rate, due in 2033
8,400 — 
Mortgage note payable, 7.717% interest rate, due in 2033
14,900 — 
Senior unsecured notes, 6.375% interest rate, due in 2050
162,000 162,000 
2,594,320 2,457,000 
Unamortized debt premiums, discounts and issuance costs(21,711)(24,208)
$2,572,609 $2,432,792 
(1)This mortgage note was repaid at maturity in June 2023.
During the year ended December 31, 2023, we issued six fixed rate, interest-only mortgage notes as summarized in the following table:
Issuance DateSecured By
Principal Balance (1)
Interest RateMaturity
Net Book Value of Collateral as of December 31, 2023
May 2023 (2)
One property
$30,680 7.210%7/1/2033$36,807 
June 2023
One property
26,340 8.139%7/1/202852,342 
June 2023
One property
42,700 8.272%7/1/202842,834 
June 2023
One property
8,400 7.305%7/1/203319,035 
August 2023
One property
14,900 7.717%9/1/203323,908 
September 2023
Two properties
54,300 7.671%10/6/202864,828 
Total / Weighted Average$177,320 7.792%$239,754 
(1)Our mortgage notes are non-recourse, subject to certain limited exceptions and do not contain any material financial covenants.
(2)Requires interest-only payments through May 2028, at which time principal and interest payments are due monthly through the maturity date.
Schedule of Required Principal Payments
The required principal payments due during the next five years and thereafter under all our outstanding consolidated debt as of December 31, 2023 were as follows:
YearPrincipal Payment
2024$555,000 
2025650,000 
2026300,000 
2027350,000 
2028123,487 
Thereafter615,833 
Total$2,594,320 
(1)
(1)Total consolidated debt outstanding as of December 31, 2023, net of unamortized premiums, discounts and issuance costs totaling $21,711, was $2,572,609.
v3.24.0.1
Fair Value of Assets and Liabilities (Tables)
12 Months Ended
Dec. 31, 2023
Fair Value Disclosures [Abstract]  
Schedule of Assets Measured at Fair Value
The following table presents certain of our assets measured at fair value at December 31, 2023, categorized by level of inputs as defined in the fair value hierarchy under GAAP, used in the valuation of each asset:
Fair Value at Reporting Date Using
DescriptionTotalQuoted Prices in Active Markets for Identical Assets (Level 1)Significant Other Observable Inputs (Level 2)Significant Unobservable Inputs (Level 3)
Non-recurring Fair Value Measurements Assets
Assets of properties held for sale (1)
$39,000 $— $39,000 $— 
(1)We recorded an impairment charge of $11,299 to reduce the carrying value of one property in our consolidated balance sheet to its estimated fair value less estimated costs to sell of $1,777, based on a negotiated sales price with a third party buyer (Level 2 input as defined in the fair value hierarchy under GAAP). See Note 4 for more information.
Schedule of Fair Value and Carrying Value of Financial Instruments At December 31, 2023 and 2022, the fair values of our financial instruments approximated their carrying values in our consolidated financial statements, due to their short term nature or floating interest rates, except as follows:
 As of December 31, 2023As of December 31, 2022
Financial Instrument
Carrying Value(1)
Fair Value
Carrying Value(1)
Fair Value
Senior unsecured notes, 4.25% interest rate, due in 2024
$349,144 $331,510 $346,863 $331,601 
Senior unsecured notes, 4.50% interest rate, due in 2025
646,266 510,445 642,818 589,388 
Senior unsecured notes, 2.650% interest rate, due in 2026
298,464 185,934 297,839 232,770 
Senior unsecured notes, 2.400% interest rate, due in 2027
348,086 196,147 347,466 256,606 
Senior unsecured notes, 3.450% interest rate, due in 2031
396,614 199,060 396,178 268,004 
Senior unsecured notes, 6.375% interest rate, due in 2050
156,904 83,916 156,711 113,075 
Mortgage notes payable (2)(3)
172,131 179,813 49,917 49,099 
Total $2,367,609 $1,686,825 $2,237,792 $1,840,543 
(1)Includes unamortized debt premiums, discounts and issuance costs totaling $21,711 and $24,208 as of December 31, 2023 and 2022, respectively.
(2)Balances as of December 31, 2022 include a mortgage note secured by one property with an outstanding principal balance of $50,000 that was repaid in June 2023.
(3)Balances as of December 31, 2023 include six mortgage notes issued during the year ended December 31, 2023 with an aggregate principal balance of $177,320.
v3.24.0.1
Shareholders' Equity (Tables)
12 Months Ended
Dec. 31, 2023
Equity [Abstract]  
Summary of Shares Granted And Vested Under The Terms of The Entity's 2009 Plan
A summary of shares awarded, forfeited, vested and unvested under the terms of the 2009 Plan for the years ended December 31, 2023, 2022 and 2021, is as follows:
202320222021
Number of SharesWeighted Average Grant Date Fair ValueNumber of SharesWeighted Average Grant Date Fair ValueNumber of SharesWeighted Average Grant Date Fair Value
Unvested at beginning of year231,301 $21.47 182,224 $26.23 157,521 $29.26 
Awarded241,800 $6.04 172,700 $17.74 145,800 $26.28 
Forfeited (3,700)$17.31 (1,900)$25.97 (700)$25.97 
Vested(180,720)$16.00 (121,723)$23.24 (120,397)$30.24 
Unvested at end of year288,681 $12.01 231,301 $21.47 182,224 $26.23 
Schedule of Dividends
During the years ended December 31, 2023, 2022 and 2021, we paid distributions on our common shares as follows:
Annual Per Share DistributionTotal DistributionsCharacterization of Distributions
Year Return of CapitalOrdinary IncomeQualified Dividend
2023$1.30 $63,187 100.00%—%—%
2022$2.20 $106,630 62.68%37.32%—%
2021$2.20 $106,368 —%100.00%—%
v3.24.0.1
Organization (Details)
12 Months Ended
Dec. 31, 2023
ft²
joint_venture
property
Dec. 31, 2021
ft²
Real Estate Properties [Line Items]    
Number of properties (in properties) | property 152  
Rentable area of properties (in square feet)   926,000
Number of joint ventures | joint_venture 2  
Unconsolidated Joint Ventures    
Real Estate Properties [Line Items]    
Number of properties (in properties) | property 3  
Rentable area of properties (in square feet) 468,000  
Number of joint ventures | joint_venture 2  
Joint Venture Property 1    
Real Estate Properties [Line Items]    
Percentage of ownership interest 51.00%  
Joint Venture Property 2    
Real Estate Properties [Line Items]    
Percentage of ownership interest 50.00%  
Continuing Operations    
Real Estate Properties [Line Items]    
Rentable area of properties (in square feet) 20,541,000  
v3.24.0.1
Summary of Significant Accounting Policies - Real Estate Properties, Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Real Estate [Line Items]      
Net increase (decrease) to rental income $ 252 $ (975) $ (2,288)
Amortization of the value of leases 92,805 119,703 144,826
Projected future amortization of net intangible lease assets and liabilities, excluding those classified as discontinued operations      
2024 67,692    
2025 48,838    
2026 35,068    
2027 26,833    
2028 14,123    
Thereafter 59,279    
Original Value Lease      
Real Estate [Line Items]      
Amortization of the value of leases $ 93,057 $ 118,728 $ 142,538
Minimum | Buildings and Improvements      
Real Estate [Line Items]      
Property, plant and equipment, useful life 7 years    
Maximum | Buildings and Improvements      
Real Estate [Line Items]      
Property, plant and equipment, useful life 40 years    
Weighted Average      
Real Estate [Line Items]      
Below market, acquired lease amortization period 11 years    
Weighted Average | Above Market Lease      
Real Estate [Line Items]      
Acquired lease amortization period 3 years 4 months 24 days    
Weighted Average | Original Value Lease      
Real Estate [Line Items]      
Acquired lease amortization period 6 years 6 months    
v3.24.0.1
Summary of Significant Accounting Policies - Schedule of Real Estate Assets and Obligations (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Real Estate [Line Items]    
Acquired real estate leases, net $ 263,498 $ 369,333
Capitalized below market lease values 25,678 27,033
Less: accumulated amortization (14,013) (12,876)
Assumed real estate lease obligations, net 11,665 14,157
Above Market Lease    
Real Estate [Line Items]    
Real estate leases 14,758 15,792
Less: accumulated amortization (10,876) (9,672)
Acquired real estate leases, net 3,882 6,120
Original Value Lease    
Real Estate [Line Items]    
Real estate leases 572,766 728,773
Less: accumulated amortization (313,150) (365,560)
Acquired real estate leases, net $ 259,616 $ 363,213
v3.24.0.1
Summary of Significant Accounting Policies - Deferred Leasing and Debt Issuance Costs (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]      
Amortization of deferred leasing costs $ 8,737 $ 6,869 $ 6,691
Deferred sales inducement cost, amortization expense 1,326 1,124 $ 1,187
Deferred leasing costs, gross 113,433 94,680  
Accumulated amortization of deferred leasing costs 26,462 21,582  
Future amortization of deferred leasing costs, excluding those classified as discontinued operations      
2024 11,807    
2025 10,549    
2026 9,912    
2027 8,919    
2028 8,116    
Thereafter 37,668    
Deferred financing fees, net 16,623 13,589  
Future amortization of deferred financing fees      
2024 3,147    
2025 2,573    
2026 2,239    
2027 1,499    
2028 1,231    
Thereafter 6,022    
Line of Credit      
Future amortization of deferred leasing costs, excluding those classified as discontinued operations      
Maximum borrowing capacity on revolving credit facility 750,000    
Deferred financing fees, gross 5,328 4,593  
Accumulated amortization of deferred financing fees $ 5,240 $ 4,072  
v3.24.0.1
Summary of Significant Accounting Policies - Additional Information (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
joint_venture
property
segment
Dec. 31, 2022
USD ($)
Schedule of Equity Method Investments [Line Items]    
Number of joint ventures | joint_venture 2  
Number of properties (in properties) | property 152  
Number of business segments | segment 1  
Mortgage Note Payable    
Schedule of Equity Method Investments [Line Items]    
Principal balance | $ $ 177,320  
Joint Venture Property 1    
Schedule of Equity Method Investments [Line Items]    
Percentage of ownership interest 51.00%  
Joint Venture Property 2    
Schedule of Equity Method Investments [Line Items]    
Percentage of ownership interest 50.00%  
Unconsolidated Joint Ventures    
Schedule of Equity Method Investments [Line Items]    
Number of joint ventures | joint_venture 2  
Number of properties (in properties) | property 3  
Unconsolidated Joint Ventures | Joint Venture Property 1    
Schedule of Equity Method Investments [Line Items]    
Percentage of ownership interest 51.00%  
Unconsolidated Joint Ventures | Joint Venture Property 2    
Schedule of Equity Method Investments [Line Items]    
Percentage of ownership interest 50.00%  
Unconsolidated Joint Ventures    
Schedule of Equity Method Investments [Line Items]    
Number of joint ventures | joint_venture 2  
Number of properties (in properties) | property 3  
Unconsolidated Joint Ventures | Mortgage Note Payable    
Schedule of Equity Method Investments [Line Items]    
Principal balance | $ $ 82,000 $ 82,000
v3.24.0.1
Per Common Share Amounts - Income (Loss) Per Common Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Numerators:      
Net loss $ (69,432) $ (6,109) $ (8,180)
Income attributable to unvested participating securities (305) (427) 0
Net loss used in calculating earnings per share $ (69,737) $ (6,536) $ (8,180)
Denominators:      
Weighted average common shares for basic earnings per share (in shares) 48,389 48,278 48,195
Weighted average common shares outstanding (diluted) (in shares) 48,389 48,278 48,195
Net income (loss) per common share - basic (in dollars per share) $ (1.44) $ (0.14) $ (0.17)
Net income (loss) per common share - diluted (in dollars per share) $ (1.44) $ (0.14) $ (0.17)
Antidilutive securities (in shares)     34
v3.24.0.1
Real Estate Properties - Real Estate Properties Narrative (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
ft²
joint_venture
property
lease
Dec. 31, 2022
USD ($)
Dec. 31, 2021
ft²
property
Real Estate Properties [Line Items]      
Number of properties (in properties) | property 152    
Area of properties (in square feet) | ft²     926,000
Real estate aggregate undepreciated carrying value | $ $ 4,065,679 $ 3,936,074  
Number of joint ventures | joint_venture 2    
Number of leases entered | lease 75    
Rentable square feet (in sqft) | ft² 1,698,000    
Weighted average lease term 8 years 6 months    
Expenditures committed on leases | $ $ 82,202    
Operating leases committed expenditures on leases executed in period committed but unspent tenant related obligations | $ $ 109,309    
Unconsolidated Joint Ventures      
Real Estate Properties [Line Items]      
Number of properties (in properties) | property 3    
Area of properties (in square feet) | ft² 468,000    
Number of joint ventures | joint_venture 2    
Joint Venture Property 1      
Real Estate Properties [Line Items]      
Percentage of ownership interest 51.00%    
Joint Venture Property 2      
Real Estate Properties [Line Items]      
Percentage of ownership interest 50.00%    
Disposal Group, Held-for-sale, Not Discontinued Operations      
Real Estate Properties [Line Items]      
Number of properties (in properties) | property 1   2
Area of properties (in square feet) | ft² 248,000    
Continuing Operations      
Real Estate Properties [Line Items]      
Area of properties (in square feet) | ft² 20,541,000    
Real estate aggregate undepreciated carrying value | $ $ 4,095,010    
Continuing Operations | Disposal Group, Held-for-sale, Not Discontinued Operations      
Real Estate Properties [Line Items]      
Carrying value | $ $ 29,331    
v3.24.0.1
Real Estate Properties - Acquisition Activities (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2021
USD ($)
ft²
property
Business Acquisition [Line Items]    
Number of properties acquired | property   3
Rentable square feet (in square feet) | ft²   926,000
Asset acquisition, consideration transferred $ 2,750 $ 576,478
Purchase price adjustments   1,761
Acquisition related costs   1,264
Assumed Real Estate Lease Obligations   (9,088)
Adjustment for estimated tax liability   13,031
Land    
Business Acquisition [Line Items]    
Asset acquisition, consideration transferred   72,078
Buildings and Improvements    
Business Acquisition [Line Items]    
Asset acquisition, consideration transferred   404,024
Acquired Real Estate Leases    
Business Acquisition [Line Items]    
Asset acquisition, consideration transferred   $ 109,464
Chicago, IL    
Business Acquisition [Line Items]    
Number of properties acquired | property   1
Rentable square feet (in square feet) | ft²   531,000
Asset acquisition, consideration transferred   $ 368,331
Assumed Real Estate Lease Obligations   (9,088)
Chicago, IL | Land    
Business Acquisition [Line Items]    
Asset acquisition, consideration transferred   42,935
Chicago, IL | Buildings and Improvements    
Business Acquisition [Line Items]    
Asset acquisition, consideration transferred   258,348
Chicago, IL | Acquired Real Estate Leases    
Business Acquisition [Line Items]    
Asset acquisition, consideration transferred   $ 76,136
Atlanta, GA    
Business Acquisition [Line Items]    
Number of properties acquired | property   1
Rentable square feet (in square feet) | ft²   346,000
Asset acquisition, consideration transferred   $ 180,602
Assumed Real Estate Lease Obligations   0
Atlanta, GA | Land    
Business Acquisition [Line Items]    
Asset acquisition, consideration transferred   13,040
Atlanta, GA | Buildings and Improvements    
Business Acquisition [Line Items]    
Asset acquisition, consideration transferred   135,459
Atlanta, GA | Acquired Real Estate Leases    
Business Acquisition [Line Items]    
Asset acquisition, consideration transferred   $ 32,103
Boston, MA    
Business Acquisition [Line Items]    
Number of properties acquired | property   1
Rentable square feet (in square feet) | ft²   49,000
Asset acquisition, consideration transferred   $ 27,545
Assumed Real Estate Lease Obligations   0
Boston, MA | Land    
Business Acquisition [Line Items]    
Asset acquisition, consideration transferred   16,103
Boston, MA | Buildings and Improvements    
Business Acquisition [Line Items]    
Asset acquisition, consideration transferred   10,217
Boston, MA | Acquired Real Estate Leases    
Business Acquisition [Line Items]    
Asset acquisition, consideration transferred   $ 1,225
v3.24.0.1
Real Estate Properties - Disposition Activities (Details)
$ in Thousands
9 Months Ended 12 Months Ended
Feb. 14, 2024
USD ($)
Sep. 30, 2021
USD ($)
property
Dec. 31, 2023
USD ($)
ft²
property
Dec. 31, 2022
USD ($)
ft²
property
Dec. 31, 2021
USD ($)
ft²
property
parcel_of_land
Real Estate Properties [Line Items]          
Number of properties (in properties) | property     152    
Rentable square feet (in square feet) | ft²         926,000
Gain (Loss) on Sale of Real Estate     $ 3,780 $ 11,001 $ 78,354
Loss on impairment of real estate     $ 11,299 $ 21,820 $ 62,420
Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property     8 18 6
Rentable square feet (in square feet) | ft²     553,000 2,326,000 2,565,000
Gross Sales Price, Excluding Closing Costs     $ 44,874 $ 211,020 $ 226,915
Gain (Loss) on Sale of Real Estate     $ 3,780 11,001 78,354
Loss on impairment of real estate       $ 21,820 $ 45,196
Disposal Group, Disposed of by Sale | Subsequent Event          
Real Estate Properties [Line Items]          
Gross Sales Price, Excluding Closing Costs $ 39,000        
Disposal Group, Held-for-sale, Not Discontinued Operations          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property     1   2
Rentable square feet (in square feet) | ft²     248,000    
Gross Sales Price, Excluding Closing Costs     $ 1,777    
Loss on impairment of real estate     $ 11,299   $ 6,991
Richfield, VA | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property     3    
Rentable square feet (in square feet) | ft²     89,000    
Gross Sales Price, Excluding Closing Costs     $ 5,350    
Gain (Loss) on Sale of Real Estate     $ 2,548    
Phoenix, AZ | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property     1    
Rentable square feet (in square feet) | ft²     107,000    
Gross Sales Price, Excluding Closing Costs     $ 4,900    
Gain (Loss) on Sale of Real Estate     $ 511    
Vernon Hills, IL | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property     1    
Rentable square feet (in square feet) | ft²     100,000    
Gross Sales Price, Excluding Closing Costs     $ 2,825    
Gain (Loss) on Sale of Real Estate     $ (2,816)    
Windsor Mill, MD | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property     1    
Rentable square feet (in square feet) | ft²     80,000    
Gross Sales Price, Excluding Closing Costs     $ 10,500    
Gain (Loss) on Sale of Real Estate     $ 244    
Santa Clara, CA | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property     1    
Rentable square feet (in square feet) | ft²     66,000    
Gross Sales Price, Excluding Closing Costs     $ 16,049    
Gain (Loss) on Sale of Real Estate     $ 705    
Chelmsford, MA | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property     1    
Rentable square feet (in square feet) | ft²     111,000    
Gross Sales Price, Excluding Closing Costs     $ 5,250    
Gain (Loss) on Sale of Real Estate     $ 2,588    
Rockville, MD | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property       1  
Rentable square feet (in square feet) | ft²       129,000  
Gross Sales Price, Excluding Closing Costs       $ 6,750  
Gain (Loss) on Sale of Real Estate       $ (72)  
Chesapeake, VA | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property       2  
Rentable square feet (in square feet) | ft²       172,000  
Gross Sales Price, Excluding Closing Costs       $ 18,945  
Gain (Loss) on Sale of Real Estate       $ 2,296  
Milwaukee, WI | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property       1  
Rentable square feet (in square feet) | ft²       29,000  
Gross Sales Price, Excluding Closing Costs       $ 3,775  
Gain (Loss) on Sale of Real Estate       $ (75)  
Holtsville, NY | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property       1  
Rentable square feet (in square feet) | ft²       264,000  
Gross Sales Price, Excluding Closing Costs       $ 28,500  
Gain (Loss) on Sale of Real Estate       $ 1,900  
Fairfax, VA | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property       1  
Rentable square feet (in square feet) | ft²       184,000  
Gross Sales Price, Excluding Closing Costs       $ 19,750  
Gain (Loss) on Sale of Real Estate       $ (13,537)  
Houston, TX | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property       1  
Rentable square feet (in square feet) | ft²       206,000  
Gross Sales Price, Excluding Closing Costs       $ 9,800  
Gain (Loss) on Sale of Real Estate       (135)  
Loss on impairment of real estate       $ 15,278  
Birmingham, AL | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property       3  
Rentable square feet (in square feet) | ft²       448,000  
Gross Sales Price, Excluding Closing Costs       $ 16,050  
Gain (Loss) on Sale of Real Estate       (265)  
Loss on impairment of real estate       $ 3,709  
Erlanger, KY | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property       1  
Rentable square feet (in square feet) | ft²       86,000  
Gross Sales Price, Excluding Closing Costs       $ 2,600  
Gain (Loss) on Sale of Real Estate       135  
Loss on impairment of real estate       $ 2,184  
Chesapeake, VA | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property       2  
Rentable square feet (in square feet) | ft²       214,000  
Gross Sales Price, Excluding Closing Costs       $ 24,000  
Gain (Loss) on Sale of Real Estate       62  
Loss on impairment of real estate       $ 649  
Everett, WA | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property       2  
Rentable square feet (in square feet) | ft²       112,000  
Gross Sales Price, Excluding Closing Costs       $ 31,500  
Gain (Loss) on Sale of Real Estate       $ 11,959  
Salem, OR | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property       1  
Rentable square feet (in square feet) | ft²       233,000  
Gross Sales Price, Excluding Closing Costs       $ 34,250  
Gain (Loss) on Sale of Real Estate       $ 5,369  
Kapolei, HI | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property       1  
Rentable square feet (in square feet) | ft²       109,000  
Gross Sales Price, Excluding Closing Costs       $ 4,000  
Gain (Loss) on Sale of Real Estate       $ 2,504  
Eaglewood, CO | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property       1  
Rentable square feet (in square feet) | ft²       140,000  
Gross Sales Price, Excluding Closing Costs       $ 11,100  
Gain (Loss) on Sale of Real Estate       $ 860  
Kansas City, MO | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property         0
Rentable square feet (in square feet) | ft²         10,000
Gross Sales Price, Excluding Closing Costs         $ 845
Gain (Loss) on Sale of Real Estate         (63)
Loss on impairment of real estate         $ 0
Richmond, VA | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property         1
Rentable square feet (in square feet) | ft²         311,000
Gross Sales Price, Excluding Closing Costs         $ 130,000
Gain (Loss) on Sale of Real Estate         54,181
Loss on impairment of real estate         $ 0
Huntsville, AL | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property         1
Rentable square feet (in square feet) | ft²         1,371,000
Gross Sales Price, Excluding Closing Costs         $ 39,000
Gain (Loss) on Sale of Real Estate         0
Loss on impairment of real estate         $ 5,383
Fresno, CA | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property         1
Rentable square feet (in square feet) | ft²         532,000
Gross Sales Price, Excluding Closing Costs         $ 6,000
Gain (Loss) on Sale of Real Estate         0
Loss on impairment of real estate         $ 33,902
Liverpool, NY | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property         1
Rentable square feet (in square feet) | ft²         38,000
Gross Sales Price, Excluding Closing Costs         $ 650
Gain (Loss) on Sale of Real Estate         31
Loss on impairment of real estate         $ 0
Memphis, TN | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property         1
Rentable square feet (in square feet) | ft²         205,000
Gross Sales Price, Excluding Closing Costs         $ 15,270
Gain (Loss) on Sale of Real Estate         287
Loss on impairment of real estate         $ 0
Stoneham, MA | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property         1
Rentable square feet (in square feet) | ft²         98,000
Gross Sales Price, Excluding Closing Costs         $ 6,650
Gain (Loss) on Sale of Real Estate         (282)
Loss on impairment of real estate         $ 5,911
Sterling, VA | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property         0
Number of land parcels | parcel_of_land         2
Rentable square feet (in square feet) | ft²         0
Gross Sales Price, Excluding Closing Costs         $ 28,500
Gain (Loss) on Sale of Real Estate         24,200
Loss on impairment of real estate         0
Brookhaven, GA | Disposal Group, Disposed of by Sale          
Real Estate Properties [Line Items]          
Number of properties (in properties) | property   3      
Loss on impairment of real estate   $ 10,658     $ 425
v3.24.0.1
Real Estate Properties - Unconsolidated Joint Ventures (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Jul. 31, 2023
Dec. 31, 2023
USD ($)
ft²
joint_venture
property
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
ft²
Oct. 31, 2023
USD ($)
Real Estate [Line Items]          
Number of joint ventures | joint_venture   2      
Number of properties (in properties) | property   152      
Rentable square feet (in square feet) | ft²       926,000  
Loss on impairment of equity method investment   $ 19,183 $ 0 $ 0  
Mortgage Note Payable          
Real Estate [Line Items]          
Interest rate (as a percent)   7.792%      
Principal balance   $ 177,320      
Unconsolidated Joint Ventures          
Real Estate [Line Items]          
Number of joint ventures | joint_venture   2      
Number of properties (in properties) | property   3      
OPI Carrying Value of Investments   $ 18,128 35,129    
Rentable square feet (in square feet) | ft²   468,000      
Equity method investment, difference between carrying amount and underlying equity   $ 701      
Unconsolidated Joint Ventures | Mortgage Note Payable          
Real Estate [Line Items]          
Interest rate (as a percent)   3.93%      
Principal balance   $ 82,000 82,000    
Unconsolidated Joint Ventures | Prosperity Metro Plaza          
Real Estate [Line Items]          
Number of properties (in properties) | property   2      
OPI Ownership   51.00%      
OPI Carrying Value of Investments   $ 18,128 19,237    
Rentable square feet (in square feet) | ft²   346,000      
Unconsolidated Joint Ventures | Prosperity Metro Plaza | Mortgage Note Payable          
Real Estate [Line Items]          
Interest rate (as a percent)   4.09%      
Principal balance   $ 50,000 50,000    
Unconsolidated Joint Ventures | 1750 H Street, NW          
Real Estate [Line Items]          
Number of properties (in properties) | property   1      
OPI Ownership   50.00%      
OPI Carrying Value of Investments   $ 0 15,892    
Rentable square feet (in square feet) | ft²   122,000      
Loss on impairment of equity method investment   $ 19,183      
Unconsolidated Joint Ventures | 1750 H Street, NW | Joint Venture Partner          
Real Estate [Line Items]          
Capital call funding requirement         $ 600
Unconsolidated Joint Ventures | 1750 H Street, NW | Mortgage Note Payable          
Real Estate [Line Items]          
Interest rate (as a percent)   3.69%      
Principal balance   $ 32,000 $ 32,000    
Debt instrument extension term 3 years        
v3.24.0.1
Leases - Narrative (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
tenant
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Lessee, Lease, Description [Line Items]      
Straight line rent adjustments $ 26,194 $ 10,830 $ 15,368
Straight line rent receivables 112,440 86,305  
Variable lease, income 88,173 83,103 85,107
Tenant reimbursement income $ 82,885 $ 78,388 81,295
Lease expense     $ 79
Lessor, Operating Lease, Payment to be Received      
Lessee, Lease, Description [Line Items]      
Number of government tenants with the right to terminate their leases | tenant 8    
Lessor, Operating Lease, Payment to be Received | Tenant with Exercisable Termination Rights | Tenant Concentration      
Lessee, Lease, Description [Line Items]      
Concentration risk, percentage 1.80%    
2024 1.40%    
2025 2.50%    
2026 2.40%    
2027 2.00%    
2028 6.10%    
2029 2.00%    
2030 2.60%    
2031 1.00%    
2032 0.80%    
2034 1.40%    
2035 4.40%    
2036 0.60%    
2037 0.60%    
2040 2.30%    
Lessor, Operating Lease, Payment to be Received | Fourteen Government Tenants | Tenant Concentration      
Lessee, Lease, Description [Line Items]      
Concentration risk, percentage 3.90%    
v3.24.0.1
Leases - Operating Lease Maturity (Details)
$ in Thousands
Dec. 31, 2023
USD ($)
Leases [Abstract]  
2024 $ 378,748
2025 339,500
2026 310,205
2027 281,109
2028 243,928
Thereafter 1,428,379
Total $ 2,981,869
v3.24.0.1
Business and Property Management Agreements with RMR (Details) - RMR LLC
$ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
employee
agreement
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Related Party Transaction [Line Items]      
Number of employees | employee 0    
Number of agreements with RMR LLC to provide management services | agreement 2    
Recognized amortization of the liability $ 603 $ 603 $ 603
Management fees as percentage of gross collected rents 3.00%    
Construction supervision fees as percentage of construction costs 5.00%    
Net Property Management and Construction Supervision Fees      
Related Party Transaction [Line Items]      
Transaction amount $ 23,280 25,756 21,103
Reimbursement amounts 484 484 484
Net Property Management and Construction Supervision Fees | Investment Building and Building Improvements      
Related Party Transaction [Line Items]      
Transaction amount 8,390 9,917 4,596
Net Property Management and Construction Supervision Fees | Other Operating Income (Expense)      
Related Party Transaction [Line Items]      
Transaction amount 14,890 15,839 16,507
Property Operating Expenses      
Related Party Transaction [Line Items]      
Transaction amount $ 25,872 24,371 24,766
Transition Services      
Related Party Transaction [Line Items]      
Duration of transition services 120 days    
Net Business Management Fees      
Related Party Transaction [Line Items]      
Transaction amount $ 14,751 $ 17,376 $ 18,637
Amended And Restate Business Management Agreement      
Related Party Transaction [Line Items]      
Percentage applied on average historical cost of real estate investment properties acquired 0.50%    
Base management fee payable as percentage of average historical cost of real estate investments 0.70%    
Percentage of average closing stock price on stock exchange 0.70%    
Management fee payable as percentage of average market capitalization exceeding specified amount 0.50%    
Percentage for limitation and adjustments of incentive management fee payable 12.00%    
Measurement period for incentive management fee 3 years    
Average closing price of our common shares, consecutive trading days 10 days    
Highest average closing price of our common shares, final consecutive trading days 30 days    
Percentage for limitation and adjustments of incentive management fee payable, minimum total return per share percentage change 5.00%    
Percentage of base business management fee payable in common shares 1.50%    
Amended And Restate Business Management Agreement | Up C Transaction      
Related Party Transaction [Line Items]      
Written notice for convenience 60 days    
Window of written notice after calendar year 60 days    
Window for written notice after change of control 12 months    
Remaining termination fee term 10 years    
Amended And Restate Business Management Agreement | Maximum      
Related Party Transaction [Line Items]      
Threshold amount of real estate investments $ 250,000    
Threshold amount of average market capitalization $ 250,000    
Percentage for limitation and adjustments of incentive management fee payable, total return per share percentage, reduction 5.00%    
Amended And Restate Business Management Agreement | Maximum | Up C Transaction      
Related Party Transaction [Line Items]      
Termination fee term 20 years    
Amended And Restate Business Management Agreement | Minimum      
Related Party Transaction [Line Items]      
Threshold amount of real estate investments $ 250,000    
Base management fee payable average market capitalization $ 250,000    
Percentage for limitation and adjustments of incentive management fee payable, total return per share percentage, reduction 2.00%    
Amended And Restate Business Management Agreement | Minimum | Up C Transaction      
Related Party Transaction [Line Items]      
Termination fee term 19 years    
v3.24.0.1
Related Person Transactions (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Jun. 30, 2021
USD ($)
ft²
renewal_option
Dec. 31, 2023
USD ($)
agreement
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
ft²
Related Party Transaction [Line Items]        
Rental income    $ 533,553 $ 554,275 $ 576,482
Rentable square feet (in square feet) | ft²       926,000
Acquisition and transaction related costs   31,816 292 $ 0
Diversified Health Trust        
Related Party Transaction [Line Items]        
Acquisition and transaction related costs   $ 31,491    
Officers and Other Employees | Common Shares | 2009 Award Plan        
Related Party Transaction [Line Items]        
Award vesting period   4 years    
Share-based Payment Arrangement, Tranche 1 | Officers and Other Employees | Common Shares | 2009 Award Plan        
Related Party Transaction [Line Items]        
Award vesting rights, percentage   20.00%    
Share-based Payment Arrangement, Tranche 2 | Officers and Other Employees | Common Shares | 2009 Award Plan        
Related Party Transaction [Line Items]        
Award vesting rights, percentage   20.00%    
Share-based Payment Arrangement, Tranche 3 | Officers and Other Employees | Common Shares | 2009 Award Plan        
Related Party Transaction [Line Items]        
Award vesting rights, percentage   20.00%    
Share-based Compensation Award, Tranche 4 | Officers and Other Employees | Common Shares | 2009 Award Plan        
Related Party Transaction [Line Items]        
Award vesting rights, percentage   20.00%    
Share-based Compensation Award, Tranche 5 | Officers and Other Employees | Common Shares | 2009 Award Plan        
Related Party Transaction [Line Items]        
Award vesting rights, percentage   20.00%    
Related Party | RMR LLC        
Related Party Transaction [Line Items]        
Number of agreements with RMR LLC to provide management services | agreement   2    
Rental income    $ 851 $ 1,126 $ 1,138
Related Party | Sonesta International Hotels Corporation        
Related Party Transaction [Line Items]        
Lease term 30 years      
Rentable square feet (in square feet) | ft² 230,000      
Percentage upon completion of redevelopment 55.00%      
Number of renewal options | renewal_option 2      
Renewal term 10 years      
Annual base rent $ 6,436      
Deferred payment plan period 18 months      
Annual percentage increase 10.00%      
Annual base rent increase 5 years      
Tenant improvements   $ 66,000    
v3.24.0.1
Concentration (Details) - property
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Concentration Risk [Line Items]      
Number of properties (in properties) 152    
Number of states in which acquired properties located 30    
Annualized Rental Income, Excluding Properties Classified as Discontinued Operations | Tenant Concentration | U S Government, State Governments, and Other Governments      
Concentration Risk [Line Items]      
Concentration risk, percentage 27.50% 28.50% 28.90%
Annualized Rental Income, Excluding Properties Classified as Discontinued Operations | Tenant Concentration | U.S. Government      
Concentration Risk [Line Items]      
Concentration risk, percentage 19.50% 19.70% 19.50%
Annualized Rental Income, Excluding Properties Classified as Discontinued Operations | Geographic Concentration Risk | California      
Concentration Risk [Line Items]      
Concentration risk, percentage 11.80%    
Annualized Rental Income, Excluding Properties Classified as Discontinued Operations | Geographic Concentration Risk | Virginia      
Concentration Risk [Line Items]      
Concentration risk, percentage 11.60%    
Annualized Rental Income, Excluding Properties Classified as Discontinued Operations | Geographic Concentration Risk | Illinois      
Concentration Risk [Line Items]      
Concentration risk, percentage 10.60%    
Annualized Rental Income, Excluding Properties Classified as Discontinued Operations | Geographic Concentration Risk | Washington, D.C.      
Concentration Risk [Line Items]      
Concentration risk, percentage 9.30%    
Annualized Rental Income, Excluding Properties Classified as Discontinued Operations | Geographic Concentration Risk | Texas      
Concentration Risk [Line Items]      
Concentration risk, percentage 8.80%    
v3.24.0.1
Indebtedness - Outstanding Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Jun. 30, 2023
Dec. 31, 2022
Debt Instrument [Line Items]      
Borrowings outstanding $ 2,594,320   $ 2,457,000
Unamortized debt premiums, discounts and issuance costs (21,711)   (24,208)
Total borrowings outstanding $ 2,572,609   2,432,792
Senior Notes | Senior unsecured notes, 4.250% interest rate, due in 2024      
Debt Instrument [Line Items]      
Interest rate (as a percent) 4.25%    
Borrowings outstanding $ 350,000   350,000
Senior Notes | Senior unsecured notes, 4.500% interest rate, due in 2025      
Debt Instrument [Line Items]      
Interest rate (as a percent) 4.50%    
Borrowings outstanding $ 650,000   650,000
Senior Notes | Senior unsecured notes, 2.650% interest rate, due in 2026      
Debt Instrument [Line Items]      
Interest rate (as a percent) 2.65%    
Borrowings outstanding $ 300,000   300,000
Senior Notes | Senior unsecured notes, 2.400% interest rate, due in 2027      
Debt Instrument [Line Items]      
Interest rate (as a percent) 2.40%    
Borrowings outstanding $ 350,000   350,000
Senior Notes | Senior unsecured notes, 3.450% interest rate, due in 2031      
Debt Instrument [Line Items]      
Interest rate (as a percent) 3.45%    
Borrowings outstanding $ 400,000   400,000
Senior Notes | Senior unsecured notes, 6.375% interest rate, due in 2050      
Debt Instrument [Line Items]      
Interest rate (as a percent) 6.375%    
Borrowings outstanding $ 162,000   162,000
Mortgage Note Payable      
Debt Instrument [Line Items]      
Interest rate (as a percent) 7.792%    
Total borrowings outstanding $ 177,320    
Mortgage Note Payable | Mortgage note payable, 3.700% interest rate, due in 2023      
Debt Instrument [Line Items]      
Interest rate (as a percent) 3.70% 3.70%  
Borrowings outstanding $ 0   50,000
Mortgage Note Payable | Mortgage note payable, 8.272% interest rate, due in 2028      
Debt Instrument [Line Items]      
Interest rate (as a percent) 8.272%    
Borrowings outstanding $ 42,700   0
Mortgage Note Payable | Mortgage note payable, 8.139% interest rate, due in 2028      
Debt Instrument [Line Items]      
Interest rate (as a percent) 8.139%    
Borrowings outstanding $ 26,340   0
Mortgage Note Payable | Mortgage note payable, 7.671% interest rate, due in 2028      
Debt Instrument [Line Items]      
Interest rate (as a percent) 7.671%    
Borrowings outstanding $ 54,300   0
Mortgage Note Payable | Mortgage note payable, 7.210% interest rate, due in 2033      
Debt Instrument [Line Items]      
Interest rate (as a percent) 7.21%    
Borrowings outstanding $ 30,680   0
Mortgage Note Payable | Mortgage note payable, 7.305% interest rate, due in 2033      
Debt Instrument [Line Items]      
Interest rate (as a percent) 7.305%    
Borrowings outstanding $ 8,400   0
Mortgage Note Payable | Mortgage note payable, 7.717% interest rate, due in 2033      
Debt Instrument [Line Items]      
Interest rate (as a percent) 7.717%    
Borrowings outstanding $ 14,900   0
Revolving credit facility | Line of Credit      
Debt Instrument [Line Items]      
Borrowings outstanding $ 205,000   $ 195,000
v3.24.0.1
Indebtedness - Narrative (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Feb. 15, 2024
USD ($)
property
Feb. 14, 2024
USD ($)
Mar. 31, 2024
USD ($)
Jan. 31, 2024
USD ($)
property
$ / shares
Jun. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
property
$ / shares
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Debt Instrument [Line Items]                
Unsecured revolving credit facility           $ 205,000 $ 195,000  
Borrowings outstanding           2,594,320 2,457,000  
Repayments of mortgage notes payable           50,000 47,617 $ 72,541
Proceeds from Issuance of senior notes           0 $ 0 $ 1,041,809
Line of Credit                
Debt Instrument [Line Items]                
Maximum borrowing capacity on revolving credit facility           $ 750,000    
Distribution rate (in dollars per share) | $ / shares           $ 0.01    
Commitment fee percentage           0.30%    
Interest rate (as a percent)           6.90% 5.40%  
Weighted average annual interest rate           6.50% 4.00% 1.20%
Line of Credit | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate                
Debt Instrument [Line Items]                
Interest rate premium (as a percent)           1.45%    
Line of Credit | Subsequent Event                
Debt Instrument [Line Items]                
Distribution rate (in dollars per share) | $ / shares       $ 0.01        
Line of Credit | Subsequent Event | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate                
Debt Instrument [Line Items]                
Interest rate premium (as a percent)   3.50%            
Line of Credit | Revolving credit facility                
Debt Instrument [Line Items]                
Number of properties used to secured mortgage note | property           19    
Book value of properties collateralized           $ 941,937    
Borrowings outstanding           $ 205,000 $ 195,000  
Line of Credit | Revolving credit facility | Subsequent Event                
Debt Instrument [Line Items]                
Maximum borrowing capacity on revolving credit facility       $ 325,000        
Number of properties used to secured mortgage note | property       19        
Debt instrument extension term       1 year        
Commitment fee percentage   0.35%            
Unsecured revolving credit facility   $ 132,000            
Available borrowings   193,000            
Line of Credit | Secured Debt                
Debt Instrument [Line Items]                
Number of properties used to secured mortgage note | property           19    
Book value of properties collateralized           $ 941,937    
Line of Credit | Secured Debt | Subsequent Event                
Debt Instrument [Line Items]                
Principal balance       $ 100,000        
Number of properties used to secured mortgage note | property       19        
Secured Debt | Subsequent Event                
Debt Instrument [Line Items]                
Principal balance       $ 100,000        
Borrowings outstanding   $ 100,000            
Mortgage Note Payable                
Debt Instrument [Line Items]                
Principal balance           177,320    
Book value of properties collateralized           $ 239,754    
Interest rate (as a percent)           7.792%    
Mortgage Note Payable | Mortgage note payable, 3.700% interest rate, due in 2023                
Debt Instrument [Line Items]                
Interest rate (as a percent)         3.70% 3.70%    
Borrowings outstanding           $ 0 50,000  
Repayments of mortgage notes payable         $ 50,000      
Senior Notes | Senior secured notes, 9.000% interest rate, due in 2029                
Debt Instrument [Line Items]                
Book value of properties collateralized           $ 574,291    
Senior Notes | Senior unsecured notes, 4.250% interest rate, due in 2024                
Debt Instrument [Line Items]                
Interest rate (as a percent)           4.25%    
Borrowings outstanding           $ 350,000 350,000  
Senior Notes | Senior unsecured notes, 4.250% interest rate, due in 2024 | Forecast                
Debt Instrument [Line Items]                
Interest rate (as a percent)     4.25%          
Extinguishment of debt, amount     $ 350,000          
Senior Notes | Senior unsecured notes, 4.500% interest rate, due in 2025                
Debt Instrument [Line Items]                
Interest rate (as a percent)           4.50%    
Borrowings outstanding           $ 650,000 $ 650,000  
Senior Notes | Subsequent Event | Senior secured notes, 9.000% interest rate, due in 2029                
Debt Instrument [Line Items]                
Principal balance $ 300,000              
Number of properties used to secured mortgage note | property 17              
Interest rate (as a percent) 9.00%              
Proceeds from Issuance of senior notes $ 271,500              
v3.24.0.1
Indebtedness - Mortgage Note Issuances (Details) - Dec. 31, 2023
$ in Thousands
USD ($)
Total
property
mortgage_note
Debt Instrument [Line Items]        
Number of mortgage notes     6 6
Mortgage Note Payable        
Debt Instrument [Line Items]        
Principal balance $ 177,320      
Interest rate (as a percent)   7.792%    
Book value of properties collateralized 239,754      
Mortgage Note Payable | Mortgage note payable, 7.210% interest rate, due in 2033        
Debt Instrument [Line Items]        
Number of properties used to secured mortgage note | property     1  
Principal balance 30,680      
Interest rate (as a percent)   7.21%    
Book value of properties collateralized 36,807      
Mortgage Note Payable | Mortgage note payable, 8.139% interest rate, due in 2028        
Debt Instrument [Line Items]        
Number of properties used to secured mortgage note | property     1  
Principal balance 26,340      
Interest rate (as a percent)   8.139%    
Book value of properties collateralized 52,342      
Mortgage Note Payable | Mortgage note payable, 8.272% interest rate, due in 2028        
Debt Instrument [Line Items]        
Number of properties used to secured mortgage note | property     1  
Principal balance 42,700      
Interest rate (as a percent)   8.272%    
Book value of properties collateralized 42,834      
Mortgage Note Payable | Mortgage note payable, 7.305% interest rate, due in 2033        
Debt Instrument [Line Items]        
Number of properties used to secured mortgage note | property     1  
Principal balance 8,400      
Interest rate (as a percent)   7.305%    
Book value of properties collateralized 19,035      
Mortgage Note Payable | Mortgage note payable, 7.717% interest rate, due in 2033        
Debt Instrument [Line Items]        
Number of properties used to secured mortgage note | property     1  
Principal balance 14,900      
Interest rate (as a percent)   7.717%    
Book value of properties collateralized 23,908      
Mortgage Note Payable | Mortgage note payable, 7.671% interest rate, due in 2028        
Debt Instrument [Line Items]        
Number of properties used to secured mortgage note | property     2  
Principal balance 54,300      
Interest rate (as a percent)   7.671%    
Book value of properties collateralized $ 64,828      
v3.24.0.1
Indebtedness - Future Principal Payments (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Debt Disclosure [Abstract]    
2024 $ 555,000  
2025 650,000  
2026 300,000  
2027 350,000  
2028 123,487  
Thereafter 615,833  
Total 2,594,320 $ 2,457,000
Unamortized debt premiums, discounts and issuance 21,711 24,208
Total debt outstanding $ 2,572,609 $ 2,432,792
v3.24.0.1
Fair Value of Assets and Liabilities - Asset Measured at Fair Value (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Fair Value of Assets and Liabilities      
Loss on impairment of real estate $ 11,299 $ 21,820 $ 62,420
Loss on impairment of equity method investment 19,183 $ 0 0
1750 H Street, NW | Unconsolidated Joint Ventures      
Fair Value of Assets and Liabilities      
Loss on impairment of equity method investment 19,183    
Disposal Group, Held-for-sale, Not Discontinued Operations      
Fair Value of Assets and Liabilities      
Loss on impairment of real estate 11,299   $ 6,991
Gross Sales Price, Excluding Closing Costs 1,777    
Fair Value, Nonrecurring      
Fair Value of Assets and Liabilities      
Assets of properties held for sale 39,000    
Fair Value, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Fair Value of Assets and Liabilities      
Assets of properties held for sale 0    
Fair Value, Nonrecurring | Significant Other Observable Inputs (Level 2)      
Fair Value of Assets and Liabilities      
Assets of properties held for sale 39,000    
Fair Value, Nonrecurring | Significant Unobservable Inputs (Level 3)      
Fair Value of Assets and Liabilities      
Assets of properties held for sale $ 0    
v3.24.0.1
Fair Value of Assets and Liabilities - Financial Instruments (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Jun. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
property
Dec. 31, 2021
USD ($)
Dec. 31, 2023
property
Dec. 31, 2023
Dec. 31, 2023
mortgage_note
Fair Value of Financial Instruments              
Senior notes   $ 2,195,478 $ 2,187,875        
Mortgage notes payable   172,131 49,917        
Unamortized debt premiums, discounts and issuance   21,711 24,208        
Number of properties (in properties) | property         152    
Repayments of mortgage notes payable   50,000 47,617 $ 72,541      
Number of mortgage notes         6   6
Long-term debt   2,572,609 $ 2,432,792        
Mortgage note payable, 3.700% interest rate, due in 2023              
Fair Value of Financial Instruments              
Number of properties (in properties) | property     1        
Carrying Amount              
Fair Value of Financial Instruments              
Fair value of financial instruments   2,367,609 $ 2,237,792        
Fair Value              
Fair Value of Financial Instruments              
Fair value of financial instruments   1,686,825 1,840,543        
Senior Notes and Mortgages              
Fair Value of Financial Instruments              
Unamortized debt premiums, discounts and issuance   21,711 24,208        
Senior Notes | Senior unsecured notes, 4.250% interest rate, due in 2024              
Fair Value of Financial Instruments              
Interest rate (as a percent)           4.25%  
Senior Notes | Senior unsecured notes, 4.500% interest rate, due in 2025              
Fair Value of Financial Instruments              
Interest rate (as a percent)           4.50%  
Senior Notes | Senior unsecured notes, 2.650% interest rate, due in 2026              
Fair Value of Financial Instruments              
Interest rate (as a percent)           2.65%  
Senior Notes | Senior unsecured notes, 2.400% interest rate, due in 2027              
Fair Value of Financial Instruments              
Interest rate (as a percent)           2.40%  
Senior Notes | Senior unsecured notes, 3.450% interest rate, due in 2031              
Fair Value of Financial Instruments              
Interest rate (as a percent)           3.45%  
Senior Notes | Senior unsecured notes, 6.375% interest rate, due in 2050              
Fair Value of Financial Instruments              
Interest rate (as a percent)           6.375%  
Senior Notes | Carrying Amount | Senior unsecured notes, 4.250% interest rate, due in 2024              
Fair Value of Financial Instruments              
Senior notes   349,144 346,863        
Senior Notes | Carrying Amount | Senior unsecured notes, 4.500% interest rate, due in 2025              
Fair Value of Financial Instruments              
Senior notes   646,266 642,818        
Senior Notes | Carrying Amount | Senior unsecured notes, 2.650% interest rate, due in 2026              
Fair Value of Financial Instruments              
Senior notes   298,464 297,839        
Senior Notes | Carrying Amount | Senior unsecured notes, 2.400% interest rate, due in 2027              
Fair Value of Financial Instruments              
Senior notes   348,086 347,466        
Senior Notes | Carrying Amount | Senior unsecured notes, 3.450% interest rate, due in 2031              
Fair Value of Financial Instruments              
Senior notes   396,614 396,178        
Senior Notes | Carrying Amount | Senior unsecured notes, 6.375% interest rate, due in 2050              
Fair Value of Financial Instruments              
Senior notes   156,904 156,711        
Senior Notes | Fair Value | Senior unsecured notes, 4.250% interest rate, due in 2024              
Fair Value of Financial Instruments              
Senior notes   331,510 331,601        
Senior Notes | Fair Value | Senior unsecured notes, 4.500% interest rate, due in 2025              
Fair Value of Financial Instruments              
Senior notes   510,445 589,388        
Senior Notes | Fair Value | Senior unsecured notes, 2.650% interest rate, due in 2026              
Fair Value of Financial Instruments              
Senior notes   185,934 232,770        
Senior Notes | Fair Value | Senior unsecured notes, 2.400% interest rate, due in 2027              
Fair Value of Financial Instruments              
Senior notes   196,147 256,606        
Senior Notes | Fair Value | Senior unsecured notes, 3.450% interest rate, due in 2031              
Fair Value of Financial Instruments              
Senior notes   199,060 268,004        
Senior Notes | Fair Value | Senior unsecured notes, 6.375% interest rate, due in 2050              
Fair Value of Financial Instruments              
Senior notes   83,916 113,075        
Mortgages              
Fair Value of Financial Instruments              
Interest rate (as a percent)           7.792%  
Long-term debt   177,320          
Mortgages | Mortgage note payable, 3.700% interest rate, due in 2023              
Fair Value of Financial Instruments              
Interest rate (as a percent) 3.70%         3.70%  
Repayments of mortgage notes payable $ 50,000            
Mortgages | Carrying Amount              
Fair Value of Financial Instruments              
Mortgage notes payable   172,131 49,917        
Mortgages | Fair Value              
Fair Value of Financial Instruments              
Mortgage notes payable   $ 179,813 $ 49,099        
v3.24.0.1
Shareholders' Equity - Share Awards (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
installment
shares
Dec. 31, 2022
USD ($)
shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
shares
2009 Award Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares granted (in shares) 241,800 172,700 145,800  
Number of installments | installment 5      
Unvested shares (in shares) 288,681 231,301 182,224 157,521
2024 (in shares) 98,241      
2025 (in shares) 83,620      
2026 (in shares) 65,160      
2027 (in shares) 41,660      
Estimated future compensation expense for the unvested shares | $ $ 3,042      
Weighted average period of recognition of compensation expenses (in years) 23 months      
Compensation expense | $ $ 2,257 $ 2,905 $ 2,868  
Shares available for issuance under plan (in shares) 657,860      
Officers and Other Employees        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Issuance of shares, net (in shares) 210,300 141,200 117,800  
Issuance of shares, net | $ $ 1,211 $ 2,470 $ 2,994  
Trustees | 2009 Award Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares granted (in shares) 3,500 3,500 3,500  
Aggregate market value of shares awarded | $ $ 249 $ 593 $ 837  
Market value of common shares awarded to each trustee (in dollars) | $ $ 28 $ 66 $ 105  
v3.24.0.1
Shareholders' Equity - Unvested Shares Activity (Details) - 2009 Award Plan - $ / shares
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Number of Shares      
Unvested at the beginning of the period (in shares) 231,301 182,224 157,521
Granted (in shares) 241,800 172,700 145,800
Forfeited (in shares) (3,700) (1,900) (700)
Vested (in shares) (180,720) (121,723) (120,397)
Unvested at the end of the period (in shares) 288,681 231,301 182,224
Weighted Average Grant Date Fair Value      
Unvested at the beginning of the period (in dollars per share) $ 21.47 $ 26.23 $ 29.26
Granted (in dollars per share) 6.04 17.74 26.28
Forfeited (in dollars per share) 17.31 25.97 25.97
Vested (in dollars per share) 16.00 23.24 30.24
Unvested at the end of the period (in dollars per share) $ 12.01 $ 21.47 $ 26.23
v3.24.0.1
Shareholders' Equity - Share Repurchases/Sale of Shares (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 11, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Class of Stock [Line Items]        
Share repurchases (in shares)   48,329 30,821 37,801
Stock repurchase price (in dollars per share)   $ 6.08 $ 17.54 $ 26.55
Subsequent Event        
Class of Stock [Line Items]        
Common distributions declared (in dollars per share) $ 0.01      
Dividends payable $ 490      
v3.24.0.1
Shareholders' Equity - Distribution (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Equity [Abstract]      
Annual Per Share Distribution (in dollars per share) $ 1.30 $ 2.20 $ 2.20
Total Distributions $ 63,187 $ 106,630 $ 106,368
Characterization of Distribution, Return of Capital 100.00% 62.68% 0.00%
Characterization of Distribution, Ordinary Income 0.00% 37.32% 100.00%
Characterization of Distribution, Quality Dividend 0.00% 0.00% 0.00%
v3.24.0.1
SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
property
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Real estate and accumulated depreciation        
Number of Properties | property 151      
Encumbrances $ 172,131      
Initial Cost to Company        
Land 785,646      
Buildings and Equipment 2,492,042      
Costs Capitalized Subsequent to Acquisition 792,516      
Impairment/ Writedowns (4,525)      
Cost amount carried at Close of Period        
Land 786,310      
Buildings and Equipment 3,279,369      
Total 4,065,679 $ 3,936,074 $ 3,911,086 $ 3,522,143
Accumulated Depreciation $ (650,179) $ (561,458) $ (495,912) $ (451,914)
445 Jan Davis Drive, Huntsville, AL        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,501      
Buildings and Equipment 1,492      
Costs Capitalized Subsequent to Acquisition 0      
Cost amount carried at Close of Period        
Land 1,501      
Buildings and Equipment 1,492      
Total 2,993      
Accumulated Depreciation $ (199)      
131 Clayton Street, Montgomery, AL        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 920      
Buildings and Equipment 9,084      
Costs Capitalized Subsequent to Acquisition 417      
Cost amount carried at Close of Period        
Land 920      
Buildings and Equipment 9,501      
Total 10,421      
Accumulated Depreciation $ (2,957)      
4344 Carmichael Road, Montgomery, AL        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,374      
Buildings and Equipment 11,658      
Costs Capitalized Subsequent to Acquisition 571      
Cost amount carried at Close of Period        
Land 1,374      
Buildings and Equipment 12,229      
Total 13,603      
Accumulated Depreciation $ (3,109)      
15451 North 28th Avenue, Phoenix, AZ        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,917      
Buildings and Equipment 7,416      
Costs Capitalized Subsequent to Acquisition 1,239      
Cost amount carried at Close of Period        
Land 1,917      
Buildings and Equipment 8,655      
Total 10,572      
Accumulated Depreciation $ (2,016)      
711 S 14th Avenue, Safford, AZ        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 460      
Buildings and Equipment 11,708      
Costs Capitalized Subsequent to Acquisition 903      
Impairment/ Writedowns (4,440)      
Cost amount carried at Close of Period        
Land 364      
Buildings and Equipment 8,267      
Total 8,631      
Accumulated Depreciation $ (1,703)      
Regents Center, Tempe, AZ        
Real estate and accumulated depreciation        
Number of Properties | property 2      
Initial Cost to Company        
Land $ 4,121      
Buildings and Equipment 3,042      
Costs Capitalized Subsequent to Acquisition 354      
Cost amount carried at Close of Period        
Land 4,121      
Buildings and Equipment 3,396      
Total 7,517      
Accumulated Depreciation $ (841)      
Campbell Place, Carlsbad, CA        
Real estate and accumulated depreciation        
Number of Properties | property 2      
Initial Cost to Company        
Land $ 5,769      
Buildings and Equipment 3,871      
Costs Capitalized Subsequent to Acquisition 7,595      
Cost amount carried at Close of Period        
Land 5,769      
Buildings and Equipment 11,466      
Total 17,235      
Accumulated Depreciation $ (3,407)      
Folsom Corporate Center, Folsom, CA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 2,904      
Buildings and Equipment 5,583      
Costs Capitalized Subsequent to Acquisition 1,587      
Cost amount carried at Close of Period        
Land 2,904      
Buildings and Equipment 7,170      
Total 10,074      
Accumulated Depreciation $ (1,238)      
Bayside Technology Park, Fremont, CA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 10,784      
Buildings and Equipment 648      
Costs Capitalized Subsequent to Acquisition 255      
Cost amount carried at Close of Period        
Land 10,784      
Buildings and Equipment 903      
Total 11,687      
Accumulated Depreciation $ (154)      
10949 N. Mather Boulevard, Rancho Cordova, CA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 562      
Buildings and Equipment 16,923      
Costs Capitalized Subsequent to Acquisition 1,052      
Cost amount carried at Close of Period        
Land 562      
Buildings and Equipment 17,975      
Total 18,537      
Accumulated Depreciation $ (4,675)      
11020 Sun Center Drive, Rancho Cordova, CA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,466      
Buildings and Equipment 8,797      
Costs Capitalized Subsequent to Acquisition 1,543      
Cost amount carried at Close of Period        
Land 1,466      
Buildings and Equipment 10,340      
Total 11,806      
Accumulated Depreciation $ (2,174)      
100 Redwood Shores Parkway, Redwood City, CA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 14,454      
Buildings and Equipment 7,721      
Costs Capitalized Subsequent to Acquisition 0      
Cost amount carried at Close of Period        
Land 14,454      
Buildings and Equipment 7,721      
Total 22,175      
Accumulated Depreciation $ (1,071)      
3875 Atherton Road, Rocklin, CA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 177      
Buildings and Equipment 853      
Costs Capitalized Subsequent to Acquisition 479      
Cost amount carried at Close of Period        
Land 177      
Buildings and Equipment 1,332      
Total 1,509      
Accumulated Depreciation $ (140)      
801 K Street, Sacramento, CA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 4,688      
Buildings and Equipment 61,994      
Costs Capitalized Subsequent to Acquisition 10,472      
Cost amount carried at Close of Period        
Land 4,688      
Buildings and Equipment 72,466      
Total 77,154      
Accumulated Depreciation $ (15,524)      
9815 Goethe Road, Sacramento, CA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,450      
Buildings and Equipment 9,465      
Costs Capitalized Subsequent to Acquisition 2,181      
Cost amount carried at Close of Period        
Land 1,450      
Buildings and Equipment 11,646      
Total 13,096      
Accumulated Depreciation $ (3,400)      
Capitol Place, Sacramento, CA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 2,290      
Buildings and Equipment 35,891      
Costs Capitalized Subsequent to Acquisition 8,674      
Cost amount carried at Close of Period        
Land 2,290      
Buildings and Equipment 44,565      
Total 46,855      
Accumulated Depreciation $ (15,686)      
4560 Viewridge Road, San Diego, CA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 4,269      
Buildings and Equipment 18,316      
Costs Capitalized Subsequent to Acquisition 5,294      
Cost amount carried at Close of Period        
Land 4,347      
Buildings and Equipment 23,532      
Total 27,879      
Accumulated Depreciation $ (14,798)      
2115 O'Nel Drive, San Jose, CA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 12,305      
Buildings and Equipment 5,062      
Costs Capitalized Subsequent to Acquisition 385      
Cost amount carried at Close of Period        
Land 12,305      
Buildings and Equipment 5,447      
Total 17,752      
Accumulated Depreciation $ (765)      
North First Street, San Jose, CA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 8,311      
Buildings and Equipment 4,003      
Costs Capitalized Subsequent to Acquisition 443      
Cost amount carried at Close of Period        
Land 8,311      
Buildings and Equipment 4,446      
Total 12,757      
Accumulated Depreciation $ (729)      
Rio Robles Drive, San Jose, CA        
Real estate and accumulated depreciation        
Number of Properties | property 3      
Encumbrances $ 8,064      
Initial Cost to Company        
Land 23,687      
Buildings and Equipment 13,698      
Costs Capitalized Subsequent to Acquisition 17,061      
Cost amount carried at Close of Period        
Land 23,687      
Buildings and Equipment 30,759      
Total 54,446      
Accumulated Depreciation $ (3,779)      
2450 and 2500 Walsh Avenue, Santa Clara, CA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 6,687      
Buildings and Equipment 8,326      
Costs Capitalized Subsequent to Acquisition 280      
Cost amount carried at Close of Period        
Land 6,687      
Buildings and Equipment 8,606      
Total 15,293      
Accumulated Depreciation $ (1,181)      
3250 and 3260 Jay Street, Santa Clara, CA        
Real estate and accumulated depreciation        
Number of Properties | property 2      
Initial Cost to Company        
Land $ 19,899      
Buildings and Equipment 14,051      
Costs Capitalized Subsequent to Acquisition 114      
Cost amount carried at Close of Period        
Land 19,899      
Buildings and Equipment 14,165      
Total 34,064      
Accumulated Depreciation $ (1,949)      
603 San Juan Avenue, Stockton, CA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 563      
Buildings and Equipment 5,470      
Costs Capitalized Subsequent to Acquisition 206      
Cost amount carried at Close of Period        
Land 563      
Buildings and Equipment 5,676      
Total 6,239      
Accumulated Depreciation $ (1,586)      
350 West Java Drive, Sunnyvale, CA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 24,609      
Buildings and Equipment 462      
Costs Capitalized Subsequent to Acquisition 978      
Cost amount carried at Close of Period        
Land 24,609      
Buildings and Equipment 1,440      
Total 26,049      
Accumulated Depreciation $ (148)      
7958 South Chester Street, Centennial, CO        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 6,682      
Buildings and Equipment 7,153      
Costs Capitalized Subsequent to Acquisition 1,801      
Cost amount carried at Close of Period        
Land 6,682      
Buildings and Equipment 8,954      
Total 15,636      
Accumulated Depreciation $ (1,265)      
350 Spectrum Loop, Colorado Springs, CO        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 3,650      
Buildings and Equipment 7,732      
Costs Capitalized Subsequent to Acquisition 594      
Cost amount carried at Close of Period        
Land 3,650      
Buildings and Equipment 8,326      
Total 11,976      
Accumulated Depreciation $ (1,205)      
12795 West Alameda Parkway, Lakewood, CO        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 2,640      
Buildings and Equipment 23,777      
Costs Capitalized Subsequent to Acquisition 1,508      
Cost amount carried at Close of Period        
Land 2,640      
Buildings and Equipment 25,285      
Total 27,925      
Accumulated Depreciation $ (8,849)      
Corporate Center, Lakewood, CO        
Real estate and accumulated depreciation        
Number of Properties | property 3      
Initial Cost to Company        
Land $ 2,887      
Buildings and Equipment 27,537      
Costs Capitalized Subsequent to Acquisition 2,613      
Cost amount carried at Close of Period        
Land 2,887      
Buildings and Equipment 30,150      
Total 33,037      
Accumulated Depreciation $ (15,398)      
11 Dupont Circle, NW, Washington DC        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 28,255      
Buildings and Equipment 44,743      
Costs Capitalized Subsequent to Acquisition 19,249      
Cost amount carried at Close of Period        
Land 28,255      
Buildings and Equipment 63,992      
Total 92,247      
Accumulated Depreciation $ (12,479)      
1211 Connecticut Avenue, NW, Washington DC        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 30,388      
Buildings and Equipment 24,667      
Costs Capitalized Subsequent to Acquisition 4,855      
Cost amount carried at Close of Period        
Land 30,388      
Buildings and Equipment 29,522      
Total 59,910      
Accumulated Depreciation $ (5,821)      
1401 K Street, NW, Washington DC        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 29,215      
Buildings and Equipment 34,656      
Costs Capitalized Subsequent to Acquisition 8,485      
Cost amount carried at Close of Period        
Land 29,215      
Buildings and Equipment 43,141      
Total 72,356      
Accumulated Depreciation $ (9,458)      
20 Massachusetts Avenue, Washington DC        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 12,009      
Buildings and Equipment 51,527      
Costs Capitalized Subsequent to Acquisition 221,203      
Cost amount carried at Close of Period        
Land 12,231      
Buildings and Equipment 272,508      
Total 284,739      
Accumulated Depreciation $ (48,475)      
440 First Street, NW, Washington DC        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 27,903      
Buildings and Equipment 38,624      
Costs Capitalized Subsequent to Acquisition 2,169      
Cost amount carried at Close of Period        
Land 27,903      
Buildings and Equipment 40,793      
Total 68,696      
Accumulated Depreciation $ (6,341)      
625 Indiana Avenue, Washington DC        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 26,000      
Buildings and Equipment 25,955      
Costs Capitalized Subsequent to Acquisition 12,158      
Cost amount carried at Close of Period        
Land 26,000      
Buildings and Equipment 38,113      
Total 64,113      
Accumulated Depreciation $ (12,464)      
840 First Street, NE, Washington DC        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 42,727      
Buildings and Equipment 73,278      
Costs Capitalized Subsequent to Acquisition 2,912      
Cost amount carried at Close of Period        
Land 42,727      
Buildings and Equipment 76,190      
Total 118,917      
Accumulated Depreciation $ (12,414)      
10350 NW 112th Avenue, Miami, FL        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 4,798      
Buildings and Equipment 2,757      
Costs Capitalized Subsequent to Acquisition 2,354      
Cost amount carried at Close of Period        
Land 4,798      
Buildings and Equipment 5,111      
Total 9,909      
Accumulated Depreciation $ (684)      
7850 Southwest 6th Court, Plantation, FL        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 4,800      
Buildings and Equipment 30,592      
Costs Capitalized Subsequent to Acquisition 14,993      
Cost amount carried at Close of Period        
Land 4,800      
Buildings and Equipment 45,585      
Total 50,385      
Accumulated Depreciation $ (9,839)      
8900 Grand Oak Circle, Tampa, FL        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,100      
Buildings and Equipment 11,773      
Costs Capitalized Subsequent to Acquisition 1,661      
Cost amount carried at Close of Period        
Land 1,100      
Buildings and Equipment 13,434      
Total 14,534      
Accumulated Depreciation $ (4,219)      
180 Ted Turner Drive SW, Atlanta, GA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 5,717      
Buildings and Equipment 20,017      
Costs Capitalized Subsequent to Acquisition 1,390      
Cost amount carried at Close of Period        
Land 5,717      
Buildings and Equipment 21,407      
Total 27,124      
Accumulated Depreciation $ (5,989)      
1224 Hammond Drive, Atlanta GA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 13,040      
Buildings and Equipment 135,459      
Costs Capitalized Subsequent to Acquisition 11,583      
Cost amount carried at Close of Period        
Land 13,040      
Buildings and Equipment 147,042      
Total 160,082      
Accumulated Depreciation $ (10,789)      
Corporate Square, Atlanta, GA        
Real estate and accumulated depreciation        
Number of Properties | property 5      
Initial Cost to Company        
Land $ 3,996      
Buildings and Equipment 29,763      
Costs Capitalized Subsequent to Acquisition 26,570      
Cost amount carried at Close of Period        
Land 3,996      
Buildings and Equipment 56,333      
Total 60,329      
Accumulated Depreciation $ (21,009)      
Executive Park, Atlanta, GA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,521      
Buildings and Equipment 11,826      
Costs Capitalized Subsequent to Acquisition 4,123      
Cost amount carried at Close of Period        
Land 1,521      
Buildings and Equipment 15,949      
Total 17,470      
Accumulated Depreciation $ (9,089)      
One Georgia Center, Atlanta, GA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 10,250      
Buildings and Equipment 27,933      
Costs Capitalized Subsequent to Acquisition 20,903      
Cost amount carried at Close of Period        
Land 10,250      
Buildings and Equipment 48,836      
Total 59,086      
Accumulated Depreciation $ (13,865)      
One Primerica Parkway, Duluth, GA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Encumbrances $ 25,904      
Initial Cost to Company        
Land 6,927      
Buildings and Equipment 22,951      
Costs Capitalized Subsequent to Acquisition 40      
Cost amount carried at Close of Period        
Land 6,927      
Buildings and Equipment 22,991      
Total 29,918      
Accumulated Depreciation $ (3,181)      
4712 Southpark Boulevard, Ellenwood, GA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,390      
Buildings and Equipment 19,635      
Costs Capitalized Subsequent to Acquisition 911      
Cost amount carried at Close of Period        
Land 1,390      
Buildings and Equipment 20,546      
Total 21,936      
Accumulated Depreciation $ (5,707)      
8305 NW 62nd Avenue, Johnston, IA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 2,649      
Buildings and Equipment 7,997      
Costs Capitalized Subsequent to Acquisition 0      
Cost amount carried at Close of Period        
Land 2,649      
Buildings and Equipment 7,997      
Total 10,646      
Accumulated Depreciation $ (1,108)      
1185, 1249 & 1387 S. Vinnell Way, Boise, ID        
Real estate and accumulated depreciation        
Number of Properties | property 3      
Initial Cost to Company        
Land $ 3,390      
Buildings and Equipment 29,026      
Costs Capitalized Subsequent to Acquisition 1,246      
Cost amount carried at Close of Period        
Land 3,390      
Buildings and Equipment 30,272      
Total 33,662      
Accumulated Depreciation $ (8,663)      
2020 S. Arlington Heights, Arlington Heights, IL        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,450      
Buildings and Equipment 13,588      
Costs Capitalized Subsequent to Acquisition 2,129      
Cost amount carried at Close of Period        
Land 1,450      
Buildings and Equipment 15,717      
Total 17,167      
Accumulated Depreciation $ (5,138)      
1000 W. Fulton, Chicago IL        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 42,935      
Buildings and Equipment 252,914      
Costs Capitalized Subsequent to Acquisition 528      
Cost amount carried at Close of Period        
Land 42,935      
Buildings and Equipment 253,442      
Total 296,377      
Accumulated Depreciation $ (21,274)      
HUB 1415, Naperville IL        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 12,333      
Buildings and Equipment 20,586      
Costs Capitalized Subsequent to Acquisition 23,564      
Cost amount carried at Close of Period        
Land 12,333      
Buildings and Equipment 44,150      
Total 56,483      
Accumulated Depreciation $ (7,248)      
7601 and 7635 Interactive Way, Indianapolis, IN        
Real estate and accumulated depreciation        
Number of Properties | property 2      
Initial Cost to Company        
Land $ 3,337      
Buildings and Equipment 14,522      
Costs Capitalized Subsequent to Acquisition 34      
Cost amount carried at Close of Period        
Land 3,337      
Buildings and Equipment 14,556      
Total 17,893      
Accumulated Depreciation $ (1,900)      
Intech Park, Indianapolis, IN        
Real estate and accumulated depreciation        
Number of Properties | property 3      
Initial Cost to Company        
Land $ 4,170      
Buildings and Equipment 69,759      
Costs Capitalized Subsequent to Acquisition 12,052      
Cost amount carried at Close of Period        
Land 4,170      
Buildings and Equipment 81,811      
Total 85,981      
Accumulated Depreciation $ (26,133)      
7125 Industrial Road, Florence, KY        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,698      
Buildings and Equipment 11,722      
Costs Capitalized Subsequent to Acquisition 293      
Cost amount carried at Close of Period        
Land 1,698      
Buildings and Equipment 12,015      
Total 13,713      
Accumulated Depreciation $ (3,349)      
251 Causeway Street, Boston, MA        
Real estate and accumulated depreciation        
Number of Properties | property 3      
Initial Cost to Company        
Land $ 26,851      
Buildings and Equipment 36,756      
Costs Capitalized Subsequent to Acquisition 5,296      
Cost amount carried at Close of Period        
Land 26,851      
Buildings and Equipment 42,052      
Total 68,903      
Accumulated Depreciation $ (9,174)      
330 Billerica road, Chelmsford, MA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 2,477      
Buildings and Equipment 0      
Costs Capitalized Subsequent to Acquisition 10,246      
Cost amount carried at Close of Period        
Land 2,477      
Buildings and Equipment 10,246      
Total 12,723      
Accumulated Depreciation $ (1,924)      
75 Pleasant Street, Malden, MA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,050      
Buildings and Equipment 31,086      
Costs Capitalized Subsequent to Acquisition 275      
Cost amount carried at Close of Period        
Land 1,050      
Buildings and Equipment 31,361      
Total 32,411      
Accumulated Depreciation $ (10,636)      
25 Newport Avenue, Quincy, MA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 2,700      
Buildings and Equipment 9,199      
Costs Capitalized Subsequent to Acquisition 3,106      
Cost amount carried at Close of Period        
Land 2,700      
Buildings and Equipment 12,305      
Total 15,005      
Accumulated Depreciation $ (3,572)      
314 Littleton Road, Westford, MA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 5,691      
Buildings and Equipment 8,487      
Costs Capitalized Subsequent to Acquisition 100      
Cost amount carried at Close of Period        
Land 5,691      
Buildings and Equipment 8,587      
Total 14,278      
Accumulated Depreciation $ (1,201)      
Annapolis Commerce Center, Annapolis, MD        
Real estate and accumulated depreciation        
Number of Properties | property 2      
Initial Cost to Company        
Land $ 4,057      
Buildings and Equipment 7,665      
Costs Capitalized Subsequent to Acquisition 4,806      
Cost amount carried at Close of Period        
Land 4,057      
Buildings and Equipment 12,471      
Total 16,528      
Accumulated Depreciation $ (2,241)      
4201 Patterson Avenue, Baltimore, MD        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 901      
Buildings and Equipment 8,097      
Costs Capitalized Subsequent to Acquisition 4,134      
Impairment/ Writedowns (85)      
Cost amount carried at Close of Period        
Land 893      
Buildings and Equipment 12,154      
Total 13,047      
Accumulated Depreciation $ (7,198)      
7001 Columbia Gateway Drive, Columbia, MD        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 5,642      
Buildings and Equipment 10,352      
Costs Capitalized Subsequent to Acquisition 3,444      
Cost amount carried at Close of Period        
Land 5,642      
Buildings and Equipment 13,796      
Total 19,438      
Accumulated Depreciation $ (1,605)      
Hillside Center, Columbia, MD        
Real estate and accumulated depreciation        
Number of Properties | property 2      
Initial Cost to Company        
Land $ 3,437      
Buildings and Equipment 4,228      
Costs Capitalized Subsequent to Acquisition 1,015      
Cost amount carried at Close of Period        
Land 3,437      
Buildings and Equipment 5,243      
Total 8,680      
Accumulated Depreciation $ (1,098)      
TenThreeTwenty, Columbia, MD        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 3,126      
Buildings and Equipment 16,361      
Costs Capitalized Subsequent to Acquisition 4,011      
Cost amount carried at Close of Period        
Land 3,126      
Buildings and Equipment 20,372      
Total 23,498      
Accumulated Depreciation $ (3,418)      
3300 75th Avenue, Landover, MD        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Encumbrances $ 29,537      
Initial Cost to Company        
Land 4,110      
Buildings and Equipment 36,371      
Costs Capitalized Subsequent to Acquisition 3,730      
Cost amount carried at Close of Period        
Land 4,110      
Buildings and Equipment 40,101      
Total 44,211      
Accumulated Depreciation $ (13,789)      
Redland 520/530, Rockville, MD        
Real estate and accumulated depreciation        
Number of Properties | property 3      
Initial Cost to Company        
Land $ 12,714      
Buildings and Equipment 61,377      
Costs Capitalized Subsequent to Acquisition 8,002      
Cost amount carried at Close of Period        
Land 12,714      
Buildings and Equipment 69,379      
Total 82,093      
Accumulated Depreciation $ (11,313)      
Redland 540, Rockville, MD        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 10,740      
Buildings and Equipment 17,714      
Costs Capitalized Subsequent to Acquisition 6,108      
Cost amount carried at Close of Period        
Land 10,740      
Buildings and Equipment 23,822      
Total 34,562      
Accumulated Depreciation $ (5,344)      
3550 Green Court, Ann Arbor, MI        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 3,630      
Buildings and Equipment 4,857      
Costs Capitalized Subsequent to Acquisition 0      
Cost amount carried at Close of Period        
Land 3,630      
Buildings and Equipment 4,857      
Total 8,487      
Accumulated Depreciation $ (714)      
11411 E. Jefferson Avenue, Detroit, MI        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 630      
Buildings and Equipment 18,002      
Costs Capitalized Subsequent to Acquisition 586      
Cost amount carried at Close of Period        
Land 630      
Buildings and Equipment 18,588      
Total 19,218      
Accumulated Depreciation $ (6,322)      
Rosedale Corporate Plaza, Roseville, MN        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 672      
Buildings and Equipment 6,045      
Costs Capitalized Subsequent to Acquisition 819      
Cost amount carried at Close of Period        
Land 672      
Buildings and Equipment 6,864      
Total 7,536      
Accumulated Depreciation $ (3,917)      
1300 Summit Street, Kansas City, MO        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 2,776      
Buildings and Equipment 12,070      
Costs Capitalized Subsequent to Acquisition 925      
Cost amount carried at Close of Period        
Land 2,776      
Buildings and Equipment 12,995      
Total 15,771      
Accumulated Depreciation $ (3,690)      
2555 Grand Boulevard, Kansas City, MO        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 4,209      
Buildings and Equipment 51,522      
Costs Capitalized Subsequent to Acquisition 5,414      
Cost amount carried at Close of Period        
Land 4,209      
Buildings and Equipment 56,936      
Total 61,145      
Accumulated Depreciation $ (8,213)      
4241 NE 34th Street, Kansas City, MO        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,133      
Buildings and Equipment 5,649      
Costs Capitalized Subsequent to Acquisition 5,056      
Cost amount carried at Close of Period        
Land 1,470      
Buildings and Equipment 10,368      
Total 11,838      
Accumulated Depreciation $ (5,455)      
1220 Echelon Parkway, Jackson, MS        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Encumbrances $ 14,510      
Initial Cost to Company        
Land 440      
Buildings and Equipment 25,458      
Costs Capitalized Subsequent to Acquisition 1,571      
Cost amount carried at Close of Period        
Land 440      
Buildings and Equipment 27,029      
Total 27,469      
Accumulated Depreciation $ (7,500)      
2300 and 2400 Yorkmont Road, Charlotte, NC        
Real estate and accumulated depreciation        
Number of Properties | property 2      
Initial Cost to Company        
Land $ 1,334      
Buildings and Equipment 19,075      
Costs Capitalized Subsequent to Acquisition 4,222      
Cost amount carried at Close of Period        
Land 1,334      
Buildings and Equipment 23,297      
Total 24,631      
Accumulated Depreciation $ (3,549)      
18010 and 18020 Burt Street, Omaha, NE        
Real estate and accumulated depreciation        
Number of Properties | property 2      
Initial Cost to Company        
Land $ 6,977      
Buildings and Equipment 12,500      
Costs Capitalized Subsequent to Acquisition 2,369      
Cost amount carried at Close of Period        
Land 6,977      
Buildings and Equipment 14,869      
Total 21,846      
Accumulated Depreciation $ (1,733)      
500 Charles Ewing Boulevard, Ewing, NJ        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Encumbrances $ 42,279      
Initial Cost to Company        
Land 4,808      
Buildings and Equipment 26,002      
Costs Capitalized Subsequent to Acquisition 1,554      
Cost amount carried at Close of Period        
Land 4,808      
Buildings and Equipment 27,556      
Total 32,364      
Accumulated Depreciation $ (3,737)      
299 Jefferson Road, Parsippany, NJ        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 4,543      
Buildings and Equipment 2,914      
Costs Capitalized Subsequent to Acquisition 1,282      
Cost amount carried at Close of Period        
Land 4,543      
Buildings and Equipment 4,196      
Total 8,739      
Accumulated Depreciation $ (723)      
One Jefferson Road, Parsippany, NJ        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 4,415      
Buildings and Equipment 5,249      
Costs Capitalized Subsequent to Acquisition 103      
Cost amount carried at Close of Period        
Land 4,415      
Buildings and Equipment 5,352      
Total 9,767      
Accumulated Depreciation $ (741)      
Airline Corporate Center, Colonie, NY        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 790      
Buildings and Equipment 6,400      
Costs Capitalized Subsequent to Acquisition 1,876      
Cost amount carried at Close of Period        
Land 790      
Buildings and Equipment 8,276      
Total 9,066      
Accumulated Depreciation $ (2,239)      
1212 Pittsford - Victor Road, Pittsford, NY        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 608      
Buildings and Equipment 78      
Costs Capitalized Subsequent to Acquisition 1,627      
Cost amount carried at Close of Period        
Land 608      
Buildings and Equipment 1,705      
Total 2,313      
Accumulated Depreciation $ (174)      
2231 Schrock Road, Columbus, OH        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 716      
Buildings and Equipment 217      
Costs Capitalized Subsequent to Acquisition 578      
Cost amount carried at Close of Period        
Land 716      
Buildings and Equipment 795      
Total 1,511      
Accumulated Depreciation $ (163)      
8800 Tinicum Boulevard, Philadelphia, PA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 5,573      
Buildings and Equipment 22,686      
Costs Capitalized Subsequent to Acquisition 6,022      
Cost amount carried at Close of Period        
Land 5,573      
Buildings and Equipment 28,708      
Total 34,281      
Accumulated Depreciation $ (3,658)      
446 Wrenplace Road, Fort Mill, SC        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 5,031      
Buildings and Equipment 22,524      
Costs Capitalized Subsequent to Acquisition 43      
Cost amount carried at Close of Period        
Land 5,031      
Buildings and Equipment 22,567      
Total 27,598      
Accumulated Depreciation $ (1,704)      
9680 Old Bailes Road, Fort Mill, SC        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 834      
Buildings and Equipment 2,944      
Costs Capitalized Subsequent to Acquisition 91      
Cost amount carried at Close of Period        
Land 834      
Buildings and Equipment 3,035      
Total 3,869      
Accumulated Depreciation $ (423)      
16001 North Dallas Parkway, Addison, TX        
Real estate and accumulated depreciation        
Number of Properties | property 2      
Initial Cost to Company        
Land $ 10,282      
Buildings and Equipment 63,071      
Costs Capitalized Subsequent to Acquisition 2,558      
Cost amount carried at Close of Period        
Land 10,282      
Buildings and Equipment 65,629      
Total 75,911      
Accumulated Depreciation $ (9,485)      
Research Park, Austin, TX        
Real estate and accumulated depreciation        
Number of Properties | property 2      
Initial Cost to Company        
Land $ 4,258      
Buildings and Equipment 13,747      
Costs Capitalized Subsequent to Acquisition 534      
Cost amount carried at Close of Period        
Land 4,258      
Buildings and Equipment 14,281      
Total 18,539      
Accumulated Depreciation $ (3,403)      
10451 Clay Road, Houston, TX        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 5,495      
Buildings and Equipment 10,253      
Costs Capitalized Subsequent to Acquisition 2,432      
Cost amount carried at Close of Period        
Land 5,495      
Buildings and Equipment 12,685      
Total 18,180      
Accumulated Depreciation $ (1,809)      
202 North Castlegory Road, Houston, TX        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 863      
Buildings and Equipment 5,024      
Costs Capitalized Subsequent to Acquisition 41      
Cost amount carried at Close of Period        
Land 863      
Buildings and Equipment 5,065      
Total 5,928      
Accumulated Depreciation $ (657)      
4221 W. John Carpenter Freeway, Irving, TX        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,413      
Buildings and Equipment 2,365      
Costs Capitalized Subsequent to Acquisition 1,843      
Cost amount carried at Close of Period        
Land 1,413      
Buildings and Equipment 4,208      
Total 5,621      
Accumulated Depreciation $ (1,445)      
8675, 8701-8711 Freeport Pkwy and 8901 Esters Boulevard, Irving, TX        
Real estate and accumulated depreciation        
Number of Properties | property 3      
Initial Cost to Company        
Land $ 12,970      
Buildings and Equipment 31,566      
Costs Capitalized Subsequent to Acquisition 138      
Cost amount carried at Close of Period        
Land 12,970      
Buildings and Equipment 31,704      
Total 44,674      
Accumulated Depreciation $ (4,375)      
1511 East Common Street, New Braunfels, TX        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 4,965      
Buildings and Equipment 1,266      
Costs Capitalized Subsequent to Acquisition 251      
Cost amount carried at Close of Period        
Land 4,965      
Buildings and Equipment 1,517      
Total 6,482      
Accumulated Depreciation $ (323)      
2900 West Plano Parkway, Plano, TX        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 6,819      
Buildings and Equipment 8,831      
Costs Capitalized Subsequent to Acquisition 0      
Cost amount carried at Close of Period        
Land 6,819      
Buildings and Equipment 8,831      
Total 15,650      
Accumulated Depreciation $ (1,224)      
3400 West Plano Parkway, Plano, TX        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 4,543      
Buildings and Equipment 15,964      
Costs Capitalized Subsequent to Acquisition 321      
Cost amount carried at Close of Period        
Land 4,543      
Buildings and Equipment 16,285      
Total 20,828      
Accumulated Depreciation $ (2,286)      
3600 Weismann Boulevard, San Antonio, TX        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 3,493      
Buildings and Equipment 6,662      
Costs Capitalized Subsequent to Acquisition 2,134      
Cost amount carried at Close of Period        
Land 3,493      
Buildings and Equipment 8,796      
Total 12,289      
Accumulated Depreciation $ (1,059)      
701 Clay Road, Waco, TX        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Encumbrances $ 25,903      
Initial Cost to Company        
Land 2,030      
Buildings and Equipment 8,708      
Costs Capitalized Subsequent to Acquisition 14,651      
Cost amount carried at Close of Period        
Land 2,060      
Buildings and Equipment 23,329      
Total 25,389      
Accumulated Depreciation $ (9,787)      
1800 Novell Place, Provo, UT        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 7,487      
Buildings and Equipment 43,487      
Costs Capitalized Subsequent to Acquisition 13,364      
Cost amount carried at Close of Period        
Land 7,487      
Buildings and Equipment 56,851      
Total 64,338      
Accumulated Depreciation $ (7,307)      
4885-4931 North 300 West, Provo, UT        
Real estate and accumulated depreciation        
Number of Properties | property 2      
Initial Cost to Company        
Land $ 3,915      
Buildings and Equipment 9,429      
Costs Capitalized Subsequent to Acquisition 21      
Cost amount carried at Close of Period        
Land 3,915      
Buildings and Equipment 9,450      
Total 13,365      
Accumulated Depreciation $ (1,392)      
14660, 14672 and 14668 Lee Road, Chantilly, VA        
Real estate and accumulated depreciation        
Number of Properties | property 3      
Initial Cost to Company        
Land $ 6,966      
Buildings and Equipment 74,214      
Costs Capitalized Subsequent to Acquisition 17,518      
Cost amount carried at Close of Period        
Land 6,966      
Buildings and Equipment 91,732      
Total 98,698      
Accumulated Depreciation $ (15,123)      
Enterchange At Meadowville, Chester, VA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,478      
Buildings and Equipment 9,594      
Costs Capitalized Subsequent to Acquisition 1,369      
Cost amount carried at Close of Period        
Land 1,478      
Buildings and Equipment 10,963      
Total 12,441      
Accumulated Depreciation $ (2,720)      
7987 Ashton Avenue, Manassas, VA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,562      
Buildings and Equipment 8,253      
Costs Capitalized Subsequent to Acquisition 1,069      
Cost amount carried at Close of Period        
Land 1,562      
Buildings and Equipment 9,322      
Total 10,884      
Accumulated Depreciation $ (1,946)      
Two Commercial Place, Norfolk, VA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 4,494      
Buildings and Equipment 21,508      
Costs Capitalized Subsequent to Acquisition 1,033      
Cost amount carried at Close of Period        
Land 4,494      
Buildings and Equipment 22,541      
Total 27,035      
Accumulated Depreciation $ (2,976)      
1759 Business Center Drive, Reston, VA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 4,033      
Buildings and Equipment 28,517      
Costs Capitalized Subsequent to Acquisition 2,517      
Cost amount carried at Close of Period        
Land 4,033      
Buildings and Equipment 31,034      
Total 35,067      
Accumulated Depreciation $ (7,563)      
1760 Business Center Drive, Reston, VA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 5,033      
Buildings and Equipment 50,141      
Costs Capitalized Subsequent to Acquisition 6,320      
Cost amount carried at Close of Period        
Land 5,033      
Buildings and Equipment 56,461      
Total 61,494      
Accumulated Depreciation $ (13,571)      
1775 Wiehle Avenue, Reston, VA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 4,138      
Buildings and Equipment 26,120      
Costs Capitalized Subsequent to Acquisition 5,716      
Cost amount carried at Close of Period        
Land 4,138      
Buildings and Equipment 31,836      
Total 35,974      
Accumulated Depreciation $ (5,376)      
9201 Forest Hill Avenue, Richmond, VA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,344      
Buildings and Equipment 375      
Costs Capitalized Subsequent to Acquisition 668      
Cost amount carried at Close of Period        
Land 1,344      
Buildings and Equipment 1,043      
Total 2,387      
Accumulated Depreciation $ (239)      
9960 Mayland Drive, Richmond, VA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 2,614      
Buildings and Equipment 15,930      
Costs Capitalized Subsequent to Acquisition 4,690      
Cost amount carried at Close of Period        
Land 2,614      
Buildings and Equipment 20,620      
Total 23,234      
Accumulated Depreciation $ (5,109)      
1751 Blue Hills Drive, Roanoke, VA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 2,689      
Buildings and Equipment 7,761      
Costs Capitalized Subsequent to Acquisition 0      
Cost amount carried at Close of Period        
Land 2,689      
Buildings and Equipment 7,761      
Total 10,450      
Accumulated Depreciation $ (1,076)      
Atlantic Corporate Park, Sterling, VA        
Real estate and accumulated depreciation        
Number of Properties | property 2      
Initial Cost to Company        
Land $ 5,752      
Buildings and Equipment 29,316      
Costs Capitalized Subsequent to Acquisition 3,616      
Cost amount carried at Close of Period        
Land 5,752      
Buildings and Equipment 32,932      
Total 38,684      
Accumulated Depreciation $ (5,532)      
Orbital Sciences Campus, Sterling, VA        
Real estate and accumulated depreciation        
Number of Properties | property 3      
Initial Cost to Company        
Land $ 12,275      
Buildings and Equipment 19,320      
Costs Capitalized Subsequent to Acquisition 7,400      
Cost amount carried at Close of Period        
Land 12,269      
Buildings and Equipment 26,726      
Total 38,995      
Accumulated Depreciation $ (3,205)      
Sterling Park Business Center, Sterling, VA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Encumbrances $ 25,934      
Initial Cost to Company        
Land 5,871      
Buildings and Equipment 44,324      
Costs Capitalized Subsequent to Acquisition 127      
Cost amount carried at Close of Period        
Land 5,871      
Buildings and Equipment 44,451      
Total 50,322      
Accumulated Depreciation $ (6,951)      
65 Bowdoin Street, S. Burlington VT        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 700      
Buildings and Equipment 8,416      
Costs Capitalized Subsequent to Acquisition 148      
Cost amount carried at Close of Period        
Land 700      
Buildings and Equipment 8,564      
Total 9,264      
Accumulated Depreciation $ (2,959)      
Stevens Center, Richland, WA        
Real estate and accumulated depreciation        
Number of Properties | property 2      
Initial Cost to Company        
Land $ 3,970      
Buildings and Equipment 17,035      
Costs Capitalized Subsequent to Acquisition 4,776      
Cost amount carried at Close of Period        
Land 4,042      
Buildings and Equipment 21,739      
Total 25,781      
Accumulated Depreciation $ (13,025)      
Unison Elliott Bay-Lab Space, Seattle, WA        
Real estate and accumulated depreciation        
Number of Properties | property 2      
Initial Cost to Company        
Land $ 17,316      
Buildings and Equipment 34,281      
Costs Capitalized Subsequent to Acquisition 137,343      
Cost amount carried at Close of Period        
Land 17,316      
Buildings and Equipment 171,624      
Total 188,940      
Accumulated Depreciation $ (5,302)      
Unison Elliott Bay-Office Space, Seattle, WA        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 9,324      
Buildings and Equipment 18,459      
Costs Capitalized Subsequent to Acquisition 5,101      
Cost amount carried at Close of Period        
Land 9,324      
Buildings and Equipment 23,560      
Total 32,884      
Accumulated Depreciation $ (2,953)      
5353 Yellowstone Road, Cheyenne, WY        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 1,915      
Buildings and Equipment 8,217      
Costs Capitalized Subsequent to Acquisition 2,402      
Cost amount carried at Close of Period        
Land 1,950      
Buildings and Equipment 10,584      
Total 12,534      
Accumulated Depreciation $ (6,251)      
Properties Held for Sale        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Encumbrances $ 0      
Initial Cost to Company        
Land 19,379      
Buildings and Equipment 20,115      
Costs Capitalized Subsequent to Acquisition 1,136      
Impairment/ Writedowns (11,299)      
Cost amount carried at Close of Period        
Land 13,555      
Buildings and Equipment 15,776      
Total 29,331      
Accumulated Depreciation $ (3,030)      
Properties Held for Sale | 400 South Jefferson Street, Chicago, IL        
Real estate and accumulated depreciation        
Number of Properties | property 1      
Initial Cost to Company        
Land $ 19,379      
Buildings and Equipment 20,115      
Costs Capitalized Subsequent to Acquisition 1,136      
Impairment/ Writedowns (11,299)      
Cost amount carried at Close of Period        
Land 13,555      
Buildings and Equipment 15,776      
Total 29,331      
Accumulated Depreciation $ (3,030)      
Total Real Estate Assets        
Real estate and accumulated depreciation        
Number of Properties | property 152      
Encumbrances $ 172,131      
Initial Cost to Company        
Land 805,025      
Buildings and Equipment 2,512,157      
Costs Capitalized Subsequent to Acquisition 793,652      
Impairment/ Writedowns (15,824)      
Cost amount carried at Close of Period        
Land 799,865      
Buildings and Equipment 3,295,145      
Total 4,095,010      
Accumulated Depreciation $ (653,209)      
v3.24.0.1
SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION - Additional Information (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
property
Jan. 31, 2024
USD ($)
property
Real estate and accumulated depreciation    
Mortgage debt, net $ 5,189  
Aggregate cost for federal income tax purposes $ 7,540,917  
Useful life of buildings and improvements 40 years  
Useful life of equipment 7 years  
Mortgage Note Payable    
Real estate and accumulated depreciation    
Principal balance $ 177,320  
Line of Credit | Revolving credit facility    
Real estate and accumulated depreciation    
Number of properties used to secured mortgage note | property 19  
Line of Credit | Revolving credit facility | Subsequent Event    
Real estate and accumulated depreciation    
Number of properties used to secured mortgage note | property   19
Maximum borrowing capacity on revolving credit facility   $ 325,000
Line of Credit | Secured Debt    
Real estate and accumulated depreciation    
Number of properties used to secured mortgage note | property 19  
Line of Credit | Secured Debt | Subsequent Event    
Real estate and accumulated depreciation    
Number of properties used to secured mortgage note | property   19
Principal balance   $ 100,000
Mortgage note payable, 7.671% interest rate, due in 2028 | Mortgage Note Payable    
Real estate and accumulated depreciation    
Number of properties used to secured mortgage note | property 2  
Principal balance $ 54,300  
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SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION - Carrying Amount and Accumulated Depreciation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Real Estate Properties      
Balance at the beginning of the period $ 3,936,074 $ 3,911,086 $ 3,522,143
Additions 221,246 222,951 584,805
Loss on asset impairment (11,299) (17,303) (58,696)
Disposals (51,011) (173,841) (72,137)
Cost basis adjustment   (4,235) (37,239)
Reclassification of assets of properties held for sale (29,331) (2,584) (27,790)
Balance at the end of the period 4,065,679 3,936,074 3,911,086
Accumulated Depreciation      
Balance at the beginning of the period 561,458 495,912 451,914
Additions 107,460 96,966 92,266
Loss on asset impairment 0 0 0
Disposals (15,709) (26,997) (8,675)
Cost basis adjustment   (4,235) (37,239)
Reclassification of assets of properties held for sale (3,030) (188) (2,354)
Balance at the end of the period $ 650,179 $ 561,458 $ 495,912