PUBLIC STORAGE, 10-K filed on 2/22/2022
Annual Report
v3.22.0.1
Cover Page - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Feb. 18, 2022
Jun. 30, 2021
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2021    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-33519    
Entity Registrant Name PUBLIC STORAGE    
Entity Incorporation, State or Country Code MD    
Entity Tax Identification Number 95-3551121    
Entity Address, Address Line One 701 Western Avenue    
Entity Address, City or Town Glendale    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 91201-2349    
City Area Code 818    
Local Phone Number 244-8080    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 45,156,391
Entity Common Stock, Shares Outstanding   175,462,248  
Documents Incorporated by Reference Portions of the definitive proxy statement to be filed in connection with the Annual Meeting of Shareholders to be held in 2022 are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent described therein.    
Amendment Flag false    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001393311    
Entity Voluntary Filers No    
Common Shares      
Title of 12(b) Security Common Shares, $0.10 par value    
Trading Symbol PSA    
Security Exchange Name NYSE    
Series F Preferred Stock      
Title of 12(b) Security Depositary Shares Each Representing 1/1,000 of a 5.150% Cum Pref Share, Series F, $0.01 par value    
Trading Symbol PSAPrF    
Security Exchange Name NYSE    
Series G Preferred Stock      
Title of 12(b) Security Depositary Shares Each Representing 1/1,000 of a 5.050% Cum Pref Share, Series G, $0.01 par value    
Trading Symbol PSAPrG    
Security Exchange Name NYSE    
Series H Preferred Stock      
Title of 12(b) Security Depositary Shares Each Representing 1/1,000 of a 5.600% Cum Pref Share, Series H, $0.01 par value    
Trading Symbol PSAPrH    
Security Exchange Name NYSE    
Series I Preferred Stock      
Title of 12(b) Security Depositary Shares Each Representing 1/1,000 of a 4.875% Cum Pref Share, Series I, $0.01 par value    
Trading Symbol PSAPrI    
Security Exchange Name NYSE    
Series J Preferred Stock      
Title of 12(b) Security Depositary Shares Each Representing 1/1,000 of a 4.700% Cum Pref Share, Series J, $0.01 par value    
Trading Symbol PSAPrJ    
Security Exchange Name NYSE    
Series K Preferred Stock      
Title of 12(b) Security Depositary Shares Each Representing 1/1,000 of a 4.750% Cum Pref Share, Series K, $0.01 par value    
Trading Symbol PSAPrK    
Security Exchange Name NYSE    
Series L Preferred Stock      
Title of 12(b) Security Depositary Shares Each Representing 1/1,000 of a 4.625% Cum Pref Share, Series L, $0.01 par value    
Trading Symbol PSAPrL    
Security Exchange Name NYSE    
Series M Preferred Stock      
Title of 12(b) Security Depositary Shares Each Representing 1/1,000 of a 4.125% Cum Pref Share, Series M, $0.01 par value    
Trading Symbol PSAPrM    
Security Exchange Name NYSE    
Series N Preferred Stock      
Title of 12(b) Security Depositary Shares Each Representing 1/1,000 of a 3.875% Cum Pref Share, Series N, $0.01 par value    
Trading Symbol PSAPrN    
Security Exchange Name NYSE    
Series O Preferred Stock      
Title of 12(b) Security Depositary Shares Each Representing 1/1,000 of a 3.900% Cum Pref Share, Series O, $0.01 par value    
Trading Symbol PSAPrO    
Security Exchange Name NYSE    
Series P Preferred Stock      
Title of 12(b) Security Depositary Shares Each Representing 1/1,000 of a 4.000% Cum Pref Share, Series P, $0.01 par value    
Trading Symbol PSAPrP    
Security Exchange Name NYSE    
Series Q Preferred Stock      
Title of 12(b) Security Depositary Shares Each Representing 1/1,000 of a 3.950% Cum Pref Share, Series Q, $0.01 par value    
Trading Symbol PSAPrQ    
Security Exchange Name NYSE    
Series R Preferred Stock      
Title of 12(b) Security Depositary Shares Each Representing 1/1,000 of a 4.000% Cum Pref Share, Series R, $0.01 par value    
Trading Symbol PSAPrR    
Security Exchange Name NYSE    
Series S Preferred Stock      
Title of 12(b) Security Depositary Shares Each Representing 1/1,000 of a 4.100% Cum Pref Share, Series S, $0.01 par value    
Trading Symbol PSAPrS    
Security Exchange Name NYSE    
Notes Due 2032      
Title of 12(b) Security 0.875% Senior Notes due 2032    
Trading Symbol PSA32    
Security Exchange Name NYSE    
Notes Due 2030      
Title of 12(b) Security 0.500% Senior Notes due 2030    
Trading Symbol PSA30    
Security Exchange Name NYSE    
v3.22.0.1
Audit Information
12 Months Ended
Dec. 31, 2021
Audit Information [Abstract]  
Auditor Name Ernst & Young LLP
Auditor Firm ID 42
Auditor Location Los Angeles, California
v3.22.0.1
CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
ASSETS    
Cash and equivalents $ 734,599 $ 257,560
Real estate facilities, at cost:    
Land 5,134,060 4,375,588
Buildings 17,673,773 12,997,039
Real estate facilities, gross 22,807,833 17,372,627
Accumulated depreciation (7,773,308) (7,152,135)
Real estate facilities, net 15,034,525 10,220,492
Construction in process 272,471 188,079
Total real estate facilities 15,306,996 10,408,571
Investments in unconsolidated real estate entities 828,763 773,046
Goodwill and other intangible assets, net 302,894 204,654
Other assets 207,656 172,715
Total assets 17,380,908 11,816,546
LIABILITIES AND EQUITY    
Notes payable 7,475,279 2,544,992
Preferred shares called for redemption (Note 9) 0 300,000
Accrued and other liabilities 482,091 394,655
Total liabilities 7,957,370 3,239,647
Commitments and contingencies (Note 14)
Redeemable noncontrolling interests 68,249 0
Public Storage shareholders’ equity:    
Preferred Shares, $0.01 par value, 100,000,000 shares authorized, 164,000 shares issued (in series) and outstanding, (151,700 at December 31, 2020) at liquidation preference 4,100,000 3,792,500
Common Shares, $0.10 par value, 650,000,000 shares authorized, 175,134,455 shares issued and outstanding (174,581,742 shares at December 31, 2020) 17,513 17,458
Paid-in capital 5,821,667 5,707,101
Accumulated deficit (550,416) (914,791)
Accumulated other comprehensive loss (53,587) (43,401)
Total Public Storage shareholders’ equity 9,335,177 8,558,867
Noncontrolling interests 20,112 18,032
Total equity 9,355,289 8,576,899
Total liabilities, redeemable noncontrolling interests and equity $ 17,380,908 $ 11,816,546
v3.22.0.1
CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Dec. 31, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Preferred stock, par value (in USD per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 100,000,000 100,000,000
Preferred stock, shares issued (in shares) 164,000 151,700
Preferred stock, shares outstanding (in shares) 164,000 151,700
Common stock, par value (in USD per share) $ 0.10 $ 0.10
Common stock, shares authorized (in shares) 650,000,000 650,000,000
Common stock, shares issued (in shares) 175,134,455 174,581,742
Common stock, shares outstanding (in shares) 175,134,455 174,581,742
v3.22.0.1
CONSOLIDATED STATEMENTS OF INCOME - USD ($)
shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Revenues:      
Revenues $ 3,415,824 $ 2,915,068 $ 2,855,108
Expenses:      
Self-storage cost of operations 852,030 807,543 762,416
Ancillary cost of operations 68,568 59,919 50,736
Depreciation and amortization 713,428 553,257 512,918
General and administrative 101,254 83,199 62,146
Interest expense 90,774 56,283 45,641
Operating expenses 1,826,054 1,560,201 1,433,857
Other increases (decreases) to net income:      
Interest and other income 12,306 22,323 26,683
Equity in earnings of unconsolidated real estate entities 232,093 80,497 69,547
Foreign currency exchange gain (loss) 111,787 (97,953) 7,829
Gain on sale of real estate 13,683 1,493 341
Net income 1,959,639 1,361,227 1,525,651
Allocation to noncontrolling interests (6,376) (4,014) (5,117)
Net income allocable to Public Storage shareholders 1,953,263 1,357,213 1,520,534
Allocation of net income to:      
Preferred shareholders (186,579) (207,068) (210,179)
Preferred shareholders - redemptions (Note 9) (28,914) (48,265) (32,693)
Restricted share units (5,326) (3,545) (4,895)
Net income allocable to common shareholders $ 1,732,444 $ 1,098,335 $ 1,272,767
Net income per common share:      
Basic (in USD per share) $ 9.91 $ 6.29 $ 7.30
Diluted (in USD per share) $ 9.87 $ 6.29 $ 7.29
Basic weighted average common shares outstanding (in shares) 174,858 174,494 174,287
Diluted weighted average common shares outstanding (in shares) 175,568 174,642 174,530
Self-storage facilities      
Revenues:      
Revenues $ 3,203,566 $ 2,721,630 $ 2,684,552
Ancillary operations      
Revenues:      
Revenues $ 212,258 $ 193,438 $ 170,556
v3.22.0.1
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of Comprehensive Income [Abstract]      
Net income $ 1,959,639 $ 1,361,227 $ 1,525,651
Foreign currency exchange (loss) gain on investment in Shurgard (10,186) 21,489 (830)
Total comprehensive income 1,949,453 1,382,716 1,524,821
Allocation to noncontrolling interests (6,376) (4,014) (5,117)
Comprehensive income allocable to Public Storage shareholders $ 1,943,077 $ 1,378,702 $ 1,519,704
v3.22.0.1
CONSOLIDATED STATEMENTS OF EQUITY AND REDEEMABLE NONCONTROLLING INTERESTS - USD ($)
$ in Thousands
Total
Total Public Storage Shareholders' Equity
Cumulative Preferred Shares
Common Shares
Paid-in Capital
Accumulated Deficit
Accumulated Other Comprehensive Loss
Noncontrolling Interests
Beginning balance at Dec. 31, 2018 $ 9,144,728 $ 9,119,478 $ 4,025,000 $ 17,413 $ 5,718,485 $ (577,360) $ (64,060) $ 25,250
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Issuance of preferred shares 1,059,156 1,059,156 1,090,000   (30,844)      
Redemption and shares called for redemption of preferred shares (1,050,000) (1,050,000) (1,050,000)          
Issuance of common shares in connection with share-based compensation 33,564 33,564   29 33,535      
Share-based compensation expense, net of cash paid in lieu of common shares 13,671 13,671     13,671      
Acquisition of noncontrolling interests (35,000) (23,913)     (23,913)     (11,087)
Contributions by noncontrolling interests 4,148             4,148
Net income 1,525,651 1,525,651       1,525,651    
Net income allocated to noncontrolling interests (5,117) (5,117)       (5,117)   (5,117)
Distributions to:                
Preferred shareholders (210,179) (210,179)       (210,179)    
Noncontrolling interests (6,672)             (6,672)
Common shareholders and restricted share unitholders (1,398,570) (1,398,570)       (1,398,570)    
Other comprehensive income (loss) (830) (830)         (830)  
Ending balance at Dec. 31, 2019 9,079,667 9,062,911 4,065,000 17,442 5,710,934 (665,575) (64,890) 16,756
Beginning balance at Dec. 31, 2018 0              
Ending balance at Dec. 31, 2019 0              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Issuance of preferred shares 1,208,206 1,208,206 1,247,500   (39,294)      
Redemption and shares called for redemption of preferred shares (1,520,000) (1,520,000) (1,520,000)          
Issuance of common shares in connection with share-based compensation 12,664 12,664   16 12,648      
Share-based compensation expense, net of cash paid in lieu of common shares 22,845 22,845     22,845      
Acquisition of noncontrolling interests (33) (32)     (32)     (1)
Contributions by noncontrolling interests 2,629             2,629
Net income 1,361,227 1,361,227       1,361,227    
Net income allocated to noncontrolling interests (4,014) (4,014)       (4,014)   (4,014)
Distributions to:                
Preferred shareholders (207,068) (207,068)       (207,068)    
Noncontrolling interests (5,366)             (5,366)
Common shareholders and restricted share unitholders (1,399,361) (1,399,361)       (1,399,361)    
Other comprehensive income (loss) 21,489 21,489         21,489  
Ending balance at Dec. 31, 2020 8,576,899 8,558,867 3,792,500 17,458 5,707,101 (914,791) (43,401) 18,032
Ending balance at Dec. 31, 2020 0              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Issuance of preferred shares 1,147,455 1,147,455 1,182,500   (35,045)      
Redemption and shares called for redemption of preferred shares (875,000) (875,000) (875,000)          
Issuance of common shares in connection with share-based compensation 95,860 95,860   55 95,805      
Share-based compensation expense, net of cash paid in lieu of common shares 54,492 54,492     54,492      
Acquisition of noncontrolling interests (692) (686)     (686)     (6)
Contributions by noncontrolling interests 2,451             2,451
Net income 1,959,639 1,959,639       1,959,639    
Net income allocated to noncontrolling interests (6,376) (6,376)       (6,376)   (5,906)
Distributions to:                
Preferred shareholders (186,579) (186,579)       (186,579)    
Noncontrolling interests (6,271)             (6,271)
Common shareholders and restricted share unitholders (1,402,309) (1,402,309)       (1,402,309)    
Other comprehensive income (loss) (10,186) (10,186)         (10,186)  
Ending balance at Dec. 31, 2021 9,355,289 $ 9,335,177 $ 4,100,000 $ 17,513 $ 5,821,667 $ (550,416) $ (53,587) $ 20,112
Increase (Decrease) in Temporary Equity [Roll Forward]                
Contributions by noncontrolling interests 68,170              
Net income allocated to noncontrolling interests 470              
Noncontrolling interests (391)              
Ending balance at Dec. 31, 2021 $ 68,249              
v3.22.0.1
CONSOLIDATED STATEMENTS OF EQUITY AND REDEEMABLE NONCONTROLLING INTERESTS (Parenthetical) - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]      
Issuance of preferred shares (in shares) 47,300 49,900 43,600
Redemption and shares called for redemption of preferred shares (in shares) 35,000 60,800 42,000
Issuance of common shares in connection with share-based compensation (in shares) 552,713 163,127 287,734
Distributions to common shareholders and restricted share unitholders (in USD per share) $ 8.00 $ 8.00 $ 8.00
v3.22.0.1
CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash flows from operating activities:      
Net income $ 1,959,639 $ 1,361,227 $ 1,525,651
Adjustments to reconcile net income to net cash flows from operating activities:      
Gain on sale of real estate (13,683) (1,493) (341)
Depreciation and amortization 713,428 553,257 512,918
Equity in earnings of unconsolidated real estate entities (232,093) (80,497) (69,547)
Distributions from cumulative equity in earnings of unconsolidated real estate entities 150,488 72,098 73,259
Foreign currency exchange (gain) loss (111,787) 97,953 (7,829)
Share-based compensation expense 59,815 33,363 25,833
Other 17,748 6,994 7,690
Total adjustments 583,916 681,675 541,983
Net cash flows from operating activities 2,543,555 2,042,902 2,067,634
Cash flows from investing activities:      
Capital expenditures to maintain real estate facilities (270,238) (169,998) (187,303)
Development and expansion of real estate facilities (281,981) (189,413) (284,682)
Acquisition of real estate facilities and intangible assets (5,047,106) (792,266) (437,758)
Distributions in excess of cumulative equity in earnings from unconsolidated real estate entities 19,518 24,658 11,630
Repayment of note receivable 0 7,509 0
Proceeds from sale of real estate investments 16,296 1,796 762
Net cash flows used in investing activities (5,563,511) (1,117,714) (897,351)
Cash flows from financing activities:      
Repayments on notes payable (2,218) (2,020) (1,920)
Issuance of notes payable, net of issuance costs 5,038,904 545,151 496,900
Issuance of preferred shares 1,147,455 1,208,206 1,059,156
Issuance of common shares in connection with share-based compensation 95,860 12,664 33,564
Redemption of preferred shares (1,175,000) (1,220,000) (1,050,000)
Cash paid upon vesting of restricted share units (13,069) (10,518) (12,162)
Acquisition of noncontrolling interests (692) (33) (35,000)
Contributions by noncontrolling interests 2,451 2,629 4,148
Distributions paid to preferred shareholders, common shareholders and restricted share unitholders (1,588,888) (1,606,429) (1,608,749)
Distributions paid to noncontrolling interests (6,662) (5,366) (6,672)
Net cash flows provided by (used in) financing activities 3,498,141 (1,075,716) (1,120,735)
Net cash flows from (used in) operating, investing, and financing activities 478,185 (150,528) 49,548
Net effect of foreign exchange impact on cash and equivalents, including restricted cash 505 (426) (13)
Increase (decrease) in cash and equivalents, including restricted cash 478,690 (150,954) 49,535
Cash and equivalents, including restricted cash at beginning of the period:      
Cash and equivalents 257,560 409,743 361,218
Restricted cash included in other assets 25,040 23,811 22,801
Cash, equivalents, and restricted cash 282,600 433,554 384,019
Cash and equivalents, including restricted cash at end of the period:      
Cash and equivalents 734,599 257,560 409,743
Restricted cash included in other assets 26,691 25,040 23,811
Cash, equivalents, and restricted cash 761,290 282,600 433,554
Costs incurred during the period remaining unpaid at period end for:      
Capital expenditures to maintain real estate facilities (23,398) (10,359) (16,558)
Construction or expansion of real estate facilities (50,051) (32,349) (32,356)
Real estate acquired in exchange for noncontrolling interests (68,170) 0 0
Real estate acquired in exchange for consideration payable 0 (3,799) (1,817)
Preferred shares called for redemption and reclassified to liabilities $ 0 $ 300,000 $ 0
v3.22.0.1
Description of the Business
12 Months Ended
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Description of the Business Description of the Business
Public Storage (referred to herein as “the Company,” “we,” “us,” or “our”), a Maryland real estate investment trust (“REIT”), was organized in 1980. Our principal business activities include the ownership and operation of self-storage facilities that offer storage spaces for lease, generally on a month-to-month basis, for personal and business use, ancillary activities such as tenant loss reinsurance, merchandise sales, and third party management, as well as the acquisition and development of additional self-storage space.
At December 31, 2021, we have direct and indirect equity interests in 2,787 self-storage facilities (with approximately 198.3 million net rentable square feet) located in 39 states in the United States (“U.S.”) operating under the Public Storage® name, and 0.8 million net rentable square feet of commercial and retail space.
We own an approximate 35% common equity interest in Shurgard Self Storage SA (“Shurgard”), a public company traded on Euronext Brussels under the “SHUR” symbol, which owns 253 self-storage facilities (with approximately 14 million net rentable square feet) located in seven Western European countries, all operating under the Shurgard® name. We also own an approximate 41% common equity interest in PS Business Parks, Inc. (“PSB”), a REIT traded on the New York Stock Exchange under the “PSB” symbol, which owns 28 million net rentable square feet of commercial properties, primarily multi-tenant industrial, flex, and office space, located in six states.
Disclosures of the number and square footage of facilities, as well as the number and coverage of tenant reinsurance policies (Note 14) are unaudited and outside the scope of our independent registered public accounting firm’s audit of our financial statements in accordance with the standards of the Public Company Accounting Oversight Board (U.S.).
v3.22.0.1
Basis of Presentation and Summary of Significant Accounting Policies
12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Summary of Significant Accounting Policies
Basis of Presentation
The consolidated financial statements are presented on an accrual basis in accordance with U.S. generally accepted accounting principles (“GAAP”) as set forth in the Accounting Standards Codification of the Financial Accounting Standards Board (“FASB”), and in conformity with the rules and regulations of the Securities and Exchange Commission (“SEC”).
Summary of Significant Accounting Policies
Consolidation and Equity Method of Accounting
We consider entities to be Variable Interest Entities (“VIEs”) when they have insufficient equity to finance their activities without additional subordinated financial support provided by other parties, or the equity holders as a group do not have a controlling financial interest. In addition, we have general partner interests in limited partnerships along with third-party investors to develop, construct or operate self-storage facilities. As the general partner, we consider the limited partnerships to be VIEs if the limited partners lack both substantive participating rights and substantive kick-out rights. We consolidate VIEs when we have (i) the power to direct the activities most significantly impacting economic performance, and (ii) either the obligation to absorb losses or the right to receive benefits from the VIE. The total assets, primarily real estate assets, and the total liabilities of our consolidated VIEs are not material as of December 31, 2021. We consolidate all other entities when we control them through voting shares or contractual rights. We refer to the entities we consolidate, for the period in which the reference applies, collectively as the “Subsidiaries,” and we eliminate intercompany transactions and balances.
We account for our investments in entities that we do not consolidate but over which we have significant influence using the equity method of accounting. We refer to these entities, for the periods in which the reference applies, collectively as the “Unconsolidated Real Estate Entities,” and we eliminate intra-entity profits and losses and amortize any differences between the cost of our investment and the underlying equity in net assets against equity in earnings as if the Unconsolidated Real Estate Entity were a consolidated subsidiary.
Equity in earnings of unconsolidated real estate entities presented on our income statements represents our pro-rata share of the earnings of the Unconsolidated Real Estate Entities. The dividends we receive from the Unconsolidated Real Estate Entities are reflected on our consolidated statements of cash flows as “distributions from cumulative equity in earnings of unconsolidated real estate entities” to the extent of our cumulative equity in earnings, with any excess classified as “distributions in excess of cumulative equity in earnings from unconsolidated real estate entities.”
Use of Estimates
The preparation of consolidated financial statements and accompanying notes in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported. Actual results could differ from those estimates and assumptions.
Cash Equivalents and Restricted Cash
Cash equivalents represent highly liquid financial instruments that mature within three months of acquisition such as money market funds with a rating of at least AAA by Standard & Poor's, commercial paper that is rated A1 by Standard & Poor's or deposits with highly rated commercial banks. Restricted cash, which represent amounts used to collateralize our insurance obligations and are restricted from general corporate use, are included in other assets.
Fair Value
As used herein, the term “fair value” is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. In the absence of active markets for identical assets or liabilities, such measurements involve developing assumptions based on market observable data and, in the absence of such data, internal information that is consistent with what market participants would use in a hypothetical transaction that occurs at the balance sheet date.
Assets and liabilities recorded at fair value are measured and classified in accordance with a three-tier fair value hierarchy based on the observability of the inputs available in the market used to measure fair value:
Level 1 Quoted prices in active markets for identical assets or liabilities at the measurement date.
Level 2 Significant observable inputs other than Level 1, that are observable for the asset or liability, either directly or indirectly through corroboration with observable market data.
Level 3 Unobservable inputs that are supported by little or no market data for the related assets or liabilities.
The categorization of a financial instrument within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement.
Our financial instruments consist of cash and cash equivalents, restricted cash, other assets, other liabilities, and notes payable. Cash equivalents, restricted cash, other assets and other liabilities are stated at book value, which approximates fair value as of the balance sheet date due to the short time period to maturity.
We estimate and disclose the fair value of our notes payable using Level 2 inputs by discounting the related future cash flows at a rate based upon quoted interest rates for securities that have similar characteristics such as credit quality and time to maturity.
We use significant judgment to estimate fair values of real estate facilities, goodwill, and other intangible assets for the purposes of purchase price allocation or impairment analysis. In estimating their values, we consider Level 3 inputs such as market prices of land, market capitalization rates, expected returns, earnings multiples, projected levels of earnings, costs of construction, and functional depreciation.
Real Estate Facilities
We record real estate facilities at cost. We capitalize all costs incurred to acquire, develop, construct, renovate and improve facilities as part of major repair and maintenance programs, including interest and property taxes incurred during the construction period. We expense the costs of demolition of existing facilities associated with a renovation as incurred. We allocate the net acquisition cost of acquired real estate facilities to the underlying land, buildings, and identified intangible assets based upon their respective individual estimated fair values.
We expense costs associated with dispositions of real estate, as well as routine repairs and maintenance costs, as incurred. We depreciate buildings and improvements on a straight-line basis over estimated useful lives ranging generally between 5 to 25 years.
When we sell a full or partial interest in a real estate facility without retaining a controlling interest following sale, we recognize a gain or loss on sale as if 100% of the property was sold at fair value. If we retain a controlling interest following the sale, we record a noncontrolling interest for the book value of the partial interest sold, and recognize additional paid-in capital for the difference between the consideration received and the partial interest at book value.
Goodwill and Other Intangible Assets
Intangible assets consist of goodwill, the Shurgard® trade name, which Shurgard uses pursuant to a fee-based licensing agreement, and finite-lived assets. Goodwill and the Shurgard® trade name have indefinite lives and are not amortized. Our finite-lived assets consist primarily of (i) acquired customers in place amortized relative to the benefit of the customers in place, with such amortization reflected as depreciation and amortization expense on our income statement and (ii) property tax abatements acquired and amortized relative to the reduction in property tax paid, with such amortization reflected as self-storage cost of operations on our income statement.
Evaluation of Asset Impairment
We evaluate our real estate and finite-lived intangible assets for impairment each quarter. If there are indicators of impairment and we determine that the asset is not recoverable from future undiscounted cash flows to be received through the asset’s remaining life (or, if earlier, the expected disposal date), we record an impairment charge to the extent the carrying amount exceeds the asset’s estimated fair value or net proceeds from expected disposal.
We evaluate our investments in unconsolidated real estate entities for impairment quarterly. We record an impairment charge to the extent the carrying amount exceeds estimated fair value, when we believe any such shortfall is other than temporary.
We evaluate goodwill for impairment annually and whenever relevant events, circumstances, and other related factors indicate that fair value of the related reporting unit may be less than the carrying amount. If we determine that the fair value of the reporting unit exceeds the aggregate carrying amount, no impairment charge is recorded. Otherwise, we record an impairment charge to the extent the carrying amount of the goodwill exceeds the amount that would be allocated to goodwill if the reporting unit were acquired for estimated fair value.
We evaluate other indefinite-lived intangible assets, such as the Shurgard® trade name for impairment at least annually and whenever relevant events, circumstances and other related factors indicate that the fair value is less than the carrying amount. When we conclude that it is likely that the asset is not impaired, we do not record an impairment charge and no further analysis is performed. Otherwise, we record an impairment charge to the extent the carrying amount exceeds the asset’s estimated fair value.
No impairments were recorded in any of our evaluations for any period presented herein.
Revenue and Expense Recognition
We recognize revenues from self-storage facilities, which primarily comprise rental income earned pursuant to month-to-month leases, as well as associated late charges and administrative fees, as earned. Promotional discounts
reduce rental income over the promotional period, which is generally one month. We recognize ancillary revenues when earned.
We accrue for property tax expense based upon actual amounts billed and, in some circumstances, estimates when bills or assessments have not been received from the taxing authorities. If these estimates are incorrect, the timing and amount of expense recognition could be incorrect. We expense cost of operations (including advertising expenditures), general and administrative expense, and interest expense as incurred.
Foreign Currency Exchange Translation
The local currency (primarily the Euro) is the functional currency for our interests in foreign operations. The related balance sheet amounts are translated into U.S. Dollars at the exchange rates at the respective financial statement date, while amounts on our consolidated statements of income are translated at the average exchange rates during the respective period. Cumulative translation adjustments, to the extent not included in cumulative net income, are included in equity as a component of accumulated other comprehensive income (loss).
When financial instruments denominated in a currency other than the U.S. Dollar are expected to be settled in cash in the foreseeable future, the impact of changes in the U.S. Dollar equivalent are reflected in current earnings.
At December 31, 2021, due primarily to our investment in Shurgard (Note 4) and our notes payable denominated in Euros (Note 7), our operating results and financial position are affected by fluctuations in currency exchange rates between the Euro, and to a lesser extent, other European currencies, against the U.S. Dollar. The Euro was translated at exchange rates of approximately 1.134 U.S. Dollars per Euro at December 31, 2021 (1.226 at December 31, 2020), and average exchange rates of 1.183, 1.141 and 1.120 for the years ended December 31, 2021, 2020, and 2019, respectively.
Income Taxes
We have elected to be treated as a REIT, as defined in the Internal Revenue Code of 1986, as amended (the “Code”). For each taxable year in which we qualify for taxation as a REIT, we will not be subject to U.S. federal corporate income tax on our “REIT taxable income” (generally, taxable income subject to specified adjustments, including a deduction for dividends paid and excluding our net capital gain) that is distributed to our shareholders. We believe we have met these REIT requirements for all periods presented herein. Accordingly, we have recorded no U.S. federal corporate income tax expense related to our REIT taxable income.
Our tenant reinsurance, merchandise, and third party management operations are subject to corporate income tax and such taxes are included in general and administrative expenses. We also incur income and other taxes in certain states, which are included in general and administrative expense.
We recognize tax benefits of uncertain income tax positions that are subject to audit only if we believe it is more likely than not that the position would ultimately be sustained assuming the relevant taxing authorities had full knowledge of the relevant facts and circumstances of our positions. As of December 31, 2021, we had no tax benefits that were not recognized.
Share-Based Compensation
We generally estimate the fair value of share-based payment awards on the date of grant. We determine the fair value of restricted share units ("RSUs") based on the closing market price of the Company’s common stock on the date of grant. We value stock options with no market conditions at the grant date using the Black-Scholes option-pricing model. We value stock options with market conditions at the grant date using a Monte-Carlo valuation simulation. Our determination of the fair value of share-based payment awards on the date of grant using an option-pricing model or Monte-Carlo valuation simulation is affected by our stock price as well as assumptions regarding a number of subjective and complex variables. These variables include, but are not limited to, our expected stock price volatility over the expected term of the awards and actual and projected stock option exercise behaviors. For performance-based restricted share units and stock options, we adjust compensation cost each quarter as needed for any changes in the assessment of the probability that the specified performance criteria will be achieved.
We amortize the grant-date fair value of awards as compensation expense over the service period, which begins on the grant date and ends on the expected vesting date. For awards that are earned solely upon the passage of time and continued service, the entire cost of the award is amortized on a straight-line basis over the service period. For awards with market and/or performance conditions, the individual cost of each vesting is amortized separately over each individual service period (the “accelerated attribution” method). The estimated number of stock awards that will ultimately vest requires judgment, and to the extent actual results or updated estimates differ from our current estimates, such amounts will be recorded as a cumulative adjustment in the period estimates are revised. In amortizing share-based compensation expense, we do not estimate future forfeitures. Instead, we reverse previously amortized share-based compensation expense with respect to grants that are forfeited in the period the employee terminates employment.
In July 2020, we modified our share-based compensation plans to allow immediate vesting upon retirement (“Retirement Acceleration”), and to extend the exercisability of outstanding stock options up to a year after retirement, for currently outstanding and future grants. Prior to the modification, unvested awards were forfeited, and outstanding vested stock options were cancelled, upon retirement. Employees are eligible for Retirement Acceleration if they meet certain conditions including length of service, age, notice of intent to retire, and facilitation of succession for their role. This modification results in accelerating amortization of compensation expense for each grant by changing the end of the service period from the original vesting date to the date an employee is expected to be eligible for Retirement Acceleration, if earlier.
v3.22.0.1
Real Estate Facilities
12 Months Ended
Dec. 31, 2021
Real Estate [Abstract]  
Real Estate Facilities Real Estate Facilities
Activity in real estate facilities during 2021, 2020, and 2019 is as follows:
For the Years Ended December 31,
 202120202019
 (Amounts in thousands)
Operating facilities, at cost:
Beginning balance $17,372,627 $16,289,146 $15,296,844 
Capital expenditures to maintain real estate facilities284,200 163,834 192,539 
Acquisitions 4,940,413 781,219 421,097 
Dispositions(7,408)(303)(426)
Developed or expanded facilities opened for operation218,001 138,731 379,092 
Ending balance 22,807,833 17,372,627 16,289,146 
Accumulated depreciation:
Beginning balance (7,152,135)(6,623,475)(6,140,072)
Depreciation expense (625,968)(528,660)(483,408)
Dispositions4,795 — 
Ending balance (7,773,308)(7,152,135)(6,623,475)
Construction in process:
Beginning balance 188,079 141,934 285,339 
Costs incurred to develop and expand real estate facilities302,393 188,102 235,687 
Write-off of cancelled projects— (3,226)— 
Developed or expanded facilities opened for operation(218,001)(138,731)(379,092)
Ending balance 272,471 188,079 141,934 
Total real estate facilities at December 31,
$15,306,996 $10,408,571 $9,807,605 
During 2021, we acquired 232 self-storage facilities (21,830,000 net rentable square feet of storage space), for a total cost of $5.1 billion, consisting $5.0 billion in cash and $68.2 million in partnership units in our subsidiary. Approximately $174.9 million of the total cost was allocated to intangible assets. We completed development and redevelopment activities costing $218.0 million during 2021, adding 1.6 million net rentable square feet of self-storage
space. Construction in process at December 31, 2021 consists of projects to develop new self-storage facilities and expand existing self-storage facilities.
During 2021, we sold portions of real estate facilities in connection with eminent domain proceedings for $16.3 million in cash proceeds and recorded a related gain on sale of real estate of approximately $13.7 million.
During 2020, we acquired 62 self-storage facilities (5.1 million net rentable square feet of storage space), for a total cost of $792.3 million which includes the assumption of a $3.8 million liability. Approximately $14.9 million of the total cost was allocated to intangible assets. We completed development and redevelopment activities costing $138.7 million during 2020, adding 1.1 million net rentable square feet of self-storage space. Included in general and administrative expense in 2020 is $3.2 million in development projects which were cancelled.
During 2019, we acquired 44 self-storage facilities and one commercial facility (3.1 million net rentable square feet of storage space and 46,000 net rentable square feet of commercial space), for a total cost of $439.6 million, consisting of $437.8 million in cash and the assumption of $1.8 million in mortgage notes. Approximately $18.5 million of the total cost was allocated to intangible assets. We completed development and redevelopment activities costing $379.1 million during 2019, adding 3.7 million net rentable square feet of self-storage space.
At December 31, 2021, the adjusted basis of real estate facilities for U.S. federal tax purposes was approximately $15.8 billion (unaudited).
v3.22.0.1
Investments in Unconsolidated Real Estate Entities
12 Months Ended
Dec. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]  
Investments in Unconsolidated Real Estate Entities Investments in Unconsolidated Real Estate Entities
The following table sets forth our investments in, and equity in earnings of, the Unconsolidated Real Estate Entities (amounts in thousands):
 Investments in Unconsolidated Real Estate Entities at December 31,Equity in Earnings of Unconsolidated Real Estate for the Year Ended December 31,
 20212020202120202019
PSB $515,312$431,963$207,722$64,835$54,090
Shurgard313,451341,08324,37115,66215,457
Total $828,763$773,046$232,093$80,497$69,547

The following tables represent summarized financial information for PSB and Shurgard in aggregate derived from their respective reported financial statements prepared under US GAAP before our basis difference adjustments for the years ended December 31, 2021, 2020, and 2019 (amounts in thousands):

 Year Ended December 31,
 202120202019
Revenues$790,461$721,393$713,867
Costs of operations 263,398242,992237,586
Operating income333,624290,901288,179
Gain on sale of real estate359,90427,23416,641
Net Income639,062275,680268,054

 At December 31,
 20212020
Real estate assets$3,437,115$3,353,862
Other assets481,403374,615
Total assets $3,918,518$3,728,477
Debt $943,276$742,390
Other liabilities 298,787274,950
Noncontrolling interests 262,243221,630
Shareholders' equity2,414,2122,489,507
Total liabilities and equity$3,918,518$3,728,477

Investment in PSB
Throughout all periods presented, we owned 7,158,354 shares of PSB’s common stock and 7,305,355 limited partnership units in an operating partnership controlled by PSB, representing an approximate 41% common equity interest as of December 31, 2021 (42% as of December 31, 2020). The limited partnership units are convertible at our option, subject to certain conditions, on a one-for-one basis into PSB common stock.
Based upon the closing price at December 31, 2021 ($184.17 per share of PSB common stock), the shares and units we owned had a market value of approximately $2.7 billion. During each of 2021, 2020, and 2019, we received cash distributions from PSB totaling $127.3 million, $60.7 million and $60.7 million, respectively.
PSB is a publicly held entity traded on the New York Stock Exchange under the symbol “PSB”.
Investment in Shurgard
Throughout all periods presented, we effectively owned, directly and indirectly 31,268,459 Shurgard common shares, representing an approximate 35% equity interest in Shurgard.
Based upon the closing price at December 31, 2021 (€57.50 per share of Shurgard common stock, at 1.134 exchange rate of US Dollars to the Euro), the shares we owned had a market value of approximately $2.0 billion.
Our equity in earnings of Shurgard comprised our equity share of Shurgard’s net income, less amortization of the Shurgard Basis Differential (defined below). We eliminated $1.2 million, $1.1 million and $1.0 million intra-entity profits and losses for 2021, 2020, and 2019, respectively, representing our equity share of the trademark license fees that Shurgard pays to us for the use of the Shurgard® trademark. We classify the remaining license fees we receive from Shurgard as interest and other income on our income statement. During 2021, 2020, and 2019, we received cash dividend distribution from Shurgard totaling $41.5 million, $34.9 million and $23.1 million, respectively.
At December 31, 2021, our pro-rata investment in Shurgard’s real estate assets included in investment in unconsolidated real estate entities exceeds our pro-rata share of the underlying amounts on Shurgard’s balance sheet by approximately $74.7 million ($83.1 million at December 31, 2020). This differential (the “Shurgard Basis Differential”) includes our cost basis adjustment in Shurgard’s real estate assets net of related deferred income taxes. The real estate assets basis differential is being amortized as a reduction to equity in earnings of the Unconsolidated Real Estate Entities. Such amortization totaled approximately $8.4 million, $5.8 million and $5.5 million during 2021, 2020, and 2019, respectively.
Shurgard is a publicly held entity trading on Euronext Brussels under the symbol “SHUR”.
v3.22.0.1
Goodwill and Other Intangible Assets
12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets
Goodwill and other intangible assets consisted of the following (amounts in thousands):
At December 31, 2021At December 31, 2020
Gross Book ValueAccumulated AmortizationNet Book ValueGross Book ValueAccumulated AmortizationNet Book Value
Goodwill$165,843 $— $165,843 $165,843 $— $165,843 
Shurgard® Trade Name18,824 — 18,824 18,824 — 18,824 
Finite-lived intangible assets, subject to amortization198,180 (79,953)118,227 47,321 (27,334)19,987 
Total goodwill and other intangible assets$382,847 $(79,953)$302,894 $231,988 $(27,334)$204,654 

Amortization expense related to intangible assets subject to amortization was $76.6 million, $16.1 million and $16.8 million in 2021, 2020, and 2019, respectively. During 2021, 2020, and 2019, intangibles increased $174.9 million, $14.9 million and $18.5 million, respectively, in connection with the acquisition of self-storage facilities (Note 3).
The remaining amortization expense will be recognized over a weighted average life of approximately 1.1 years. The estimated future amortization expense for our finite-lived intangible assets at December 31, 2021 is as follows (amounts in thousands):
YearAmount
2022$86,759 
202324,417
Thereafter7,051 
Total$118,227 
v3.22.0.1
Credit Facility
12 Months Ended
Dec. 31, 2021
Line of Credit Facility [Abstract]  
Credit Facility Credit FacilityWe have a revolving credit agreement (the “Credit Facility”) with a $500 million borrowing limit that matures on April 19, 2024. Amounts drawn on the Credit Facility bear annual interest at rates ranging from LIBOR plus 0.7% to LIBOR plus 1.350% depending upon the ratio of our Total Indebtedness to Gross Asset Value (as defined in the Credit Facility) (LIBOR plus 0.75% at December 31, 2021). We are also required to pay a quarterly facility fee ranging from 0.07% per annum to 0.25% per annum depending upon the ratio of our Total Indebtedness to our Gross Asset Value (0.10% per annum at December 31, 2021). At December 31, 2021 and February 22, 2022, we had no outstanding borrowings under this Credit Facility. We had undrawn standby letters of credit, which reduces our borrowing capacity, totaling $21.2 million at December 31, 2021 ($24.3 million at December 31, 2020). The Credit Facility has various customary restrictive covenants, with which we were in compliance at December 31, 2021.
v3.22.0.1
Notes Payable
12 Months Ended
Dec. 31, 2021
Notes Payable [Abstract]  
Notes Payable Notes PayableOur notes payable are reflected net of issuance costs (including original issue discounts), which are amortized as interest expense on the effective interest method over the term of each respective note. Our notes payable at December 31, 2021 and 2020 are set forth in the tables below:
   
Amounts at December 31, 2021
 Coupon RateEffective Rate PrincipalUnamortized CostsBook
 Value
Fair
 Value
   ($ amounts in thousands)
U.S. Dollar Denominated Unsecured Debt
Notes due September 15, 2022
2.370%2.483%$500,000 $(363)$499,637 $506,362 
Notes due April 23, 2024
SOFR+0.47%
0.617%700,000 (1,628)698,372 700,314 
Notes due February 15, 2026
0.875%1.030%500,000 (3,061)496,939 488,141 
Notes due November 9, 20261.500%1.640%650,000 (4,227)645,773 649,996 
Notes due September 15, 2027
3.094%3.218%500,000 (3,020)496,980 535,206 
Notes due May 1, 2028
1.850%1.962%650,000 (4,276)645,724 649,221 
Notes due November 9, 20281.950%2.044%550,000 (3,299)546,701 548,241 
Notes due May 1, 2029
3.385%3.459%500,000 (2,257)497,743 545,580 
Notes due May 1, 2031
2.300%2.419%650,000 (6,383)643,617 656,546 
Notes due November 9, 20312.250%2.322%550,000 (3,488)546,512 551,932 
 5,750,000 (32,002)5,717,998 5,831,539 
Euro Denominated Unsecured Debt
Notes due April 12, 2024
1.540%1.540%113,431 — 113,431 117,526 
Notes due November 3, 2025
2.175%2.175%274,518 — 274,518 295,256 
Notes due September 9, 20300.500%0.640%794,017 (9,730)784,287 769,561 
Notes due January 24, 2032
0.875%0.978%567,155 (5,394)561,761 551,842 
   1,749,121 (15,124)1,733,997 1,734,185 
 Mortgage Debt, secured by 11 real estate facilities with a net book value of $66.1 million
3.878%3.897%23,284 — 23,284 24,208 
 $7,522,405 $(47,126)$7,475,279 $7,589,932 
Amounts at
 December 31, 2020
 Book ValueFair Value
 ($ amounts in thousands)
U.S. Dollar Denominated Unsecured Debt
Notes due September 15, 2022
$499,109 $517,419 
Notes due September 15, 2027
496,452 560,833 
Notes due May 1, 2029
497,433 574,833 
 1,492,994 1,653,085 
Euro Denominated Unsecured Debt
Notes due April 12, 2024
122,646 129,192 
Notes due November 3, 2025
296,821 323,552 
Notes due January 24, 2032
607,301 634,389 
 1,026,768 1,087,133 
Mortgage Debt25,230 26,958 
 $2,544,992 $2,767,176 
U.S. Dollar Denominated Unsecured Notes
On January 19, 2021, we completed a public offering of $500 million aggregate principal amount of senior notes bearing interest at an annual rate of 0.875% and maturing on February 15, 2026. Interest on the senior notes is payable semi-annually, commencing on August 15, 2021. In connection with the offering, we incurred $3.8 million in costs.
On April 23, 2021, we completed a public offering of $700 million, $650 million and $650 million aggregate principal amount of senior notes bearing interest at an annual rate of the Compounded Secured Overnight Financing Rate (“SOFR”) plus 0.47% (reset quarterly and at 0.52% as of December 31, 2021), 1.850% and 2.300%, respectively, and maturing on April 23, 2024, May 1, 2028 and May 1, 2031, respectively. Interest on the 2024 notes is payable quarterly, commencing on July 23, 2021. Interest on the 2028 notes and 2031 notes is payable semi-annually, commencing on November 1, 2021. In connection with the offering, we incurred a total of $13.7 million in costs.
On November 9, 2021, we completed a public offering of $650 million, $550 million and $550 million aggregate principal amount of senior notes bearing interest at an annual rate of 1.500%, 1.950% and 2.250%, respectively, and maturing on November 9, 2026, November 9, 2028 and November 9, 2031, respectively. Interest on the senior notes is payable semi-annually, commencing on May 9, 2022. In connection with the offering, we incurred a total of $11.3 million in costs.
On April 12, 2019, we completed a public offering of $500 million in aggregate principal amount of senior notes bearing interest at an annual rate of 3.385% maturing on May 1, 2029. In connection with the offering, we incurred a total of $3.1 million in costs.
The U.S. Dollar Denominated Unsecured Notes have various financial covenants, with which we were in compliance at December 31, 2021. Included in these covenants are (a) a maximum Debt to Total Assets of 65% (approximately 16% at December 31, 2021) and (b) a minimum ratio of Adjusted EBITDA to Interest Expense of 1.5x (approximately 30x for the twelve months ended December 31, 2021) as well as covenants limiting the amount we can encumber our properties with mortgage debt.
Euro Denominated Unsecured Notes
Our Euro denominated unsecured notes (the “Euro Notes”) consist of four tranches: (i) €242.0 million issued to institutional investors on November 3, 2015 for $264.3 million in net proceeds upon converting the Euros to U.S. Dollars, (ii) €100.0 million issued to institutional investors on April 12, 2016 for $113.6 million in net proceeds upon converting the Euros to U.S. Dollars, (iii) €500.0 million issued in a public offering on January 24, 2020 for $545.2 million in net proceeds upon converting the Euros to U.S. Dollars, and (iv) €700.0 million issued in a public offering on September 9, 2021 for $817.6 million in net proceeds upon converting the Euros to U.S. Dollars. Interest is payable semi-annually on the notes issued November 3, 2015 and April 12, 2016, and annually on the notes issued January 24, 2020 and September 9, 2021. The Euro Notes have financial covenants similar to those of the U.S. Dollar Denominated Unsecured Notes.
We reflect changes in the U.S. Dollar equivalent of the amount payable, as a result of changes in foreign exchange rates as “Foreign currency exchange gain (loss)” on our income statement (gains of $111.8 million for 2021, as compared to losses of $98.0 million for 2020 and gains of $7.8 million for 2019).
Mortgage Notes
We assumed our non-recourse mortgage debt in connection with property acquisitions, and we recorded such debt at fair value with any premium or discount to the stated note balance amortized using the effective interest method.
During 2019, we assumed a mortgage note with a contractual value of $1.8 million and an interest rate of 3.9%, which approximated market rate, in connection with the acquisition of a real estate facility.
At December 31, 2021, the related contractual interest rates are fixed, ranging between 3.2% and 7.1%, and mature between November 1, 2022 and July 1, 2030.
At December 31, 2021, approximate principal maturities of our Notes Payable are as follows (amounts in thousands):
 Unsecured DebtMortgage DebtTotal
2022$500,000$2,483$502,483
202319,21919,219
2024813,431124813,555
2025274,518131274,649
20261,150,0001381,150,138
Thereafter 4,761,1721,1894,762,361
$7,499,121$23,284$7,522,405
Weighted average effective rate 1.8%3.9%1.8%
Cash paid for interest totaled $77.7 million, $52.7 million and $48.3 million for 2021, 2020, and 2019, respectively. Interest capitalized as real estate totaled $3.5 million, $3.4 million and $3.9 million for 2021, 2020, and 2019, respectively.
v3.22.0.1
Noncontrolling Interests
12 Months Ended
Dec. 31, 2021
Noncontrolling Interest [Abstract]  
Noncontrolling Interests Noncontrolling InterestsWe have noncontrolling interests related to several subsidiaries we consolidate of which we do not own 100% of the equity. At December 31, 2021, certain of these subsidiaries issued 443,970 partnership units to third-parties that are convertible on a one-for-one basis (subject to certain limitations) into common shares of the Company at the option of the unitholder. These include 211,992 partnership units of $68.2 million issued to third-parties in connection with our acquisition of a portfolio of self-storage facilities in the fourth quarter of 2021. The unitholders of these 211,992 partnership units have the right to require us to redeem their partnership units in cash if common shares of the Company are not publicly listed. We classify these noncontrolling interests as redeemable noncontrolling interest outside of total equity in our consolidated balance sheets. At December 31, 2021, these noncontrolling interests are not currently redeemable or probable of becoming redeemable.
v3.22.0.1
Shareholders' Equity
12 Months Ended
Dec. 31, 2021
Stockholders' Equity Note [Abstract]  
Shareholders' Equity Shareholders’ Equity
Preferred Shares
At December 31, 2021 and 2020, we had the following series of Cumulative Preferred Shares (“Preferred Shares”) outstanding:

   
At December 31, 2021
At December 31, 2020
SeriesEarliest Redemption DateDividend RateShares OutstandingLiquidation PreferenceShares OutstandingLiquidation Preference
   (Dollar amounts in thousands)
Series C5/17/20215.125 %— $— 8,000 $200,000 
Series D7/20/20214.950 %— — 13,000 325,000 
Series E10/14/20214.900 %— — 14,000 350,000 
Series F6/2/20225.150 %11,200 280,000 11,200 280,000 
Series G8/9/20225.050 %12,000 300,000 12,000 300,000 
Series H3/11/20245.600 %11,400 285,000 11,400 285,000 
Series I9/12/20244.875 %12,650 316,250 12,650 316,250 
Series J11/15/20244.700 %10,350 258,750 10,350 258,750 
Series K12/20/20244.750 %9,200 230,000 9,200 230,000 
Series L6/17/20254.625 %22,600 565,000 22,600 565,000 
Series M8/14/20254.125 %9,200 230,000 9,200 230,000 
Series N10/6/20253.875 %11,300 282,500 11,300 282,500 
Series O11/17/20253.900 %6,800 170,000 6,800 170,000 
Series P6/16/20264.000 %24,150 603,750 — — 
Series Q8/17/20263.950 %5,750 143,750 — — 
Series R11/19/20264.000 %17,400 435,000 — — 
Total Preferred Shares164,000 $4,100,000 151,700 $3,792,500 
The holders of our Preferred Shares have general preference rights with respect to liquidation, quarterly distributions, and any accumulated unpaid distributions. Except as noted below, holders of the Preferred Shares do not have voting rights. In the event of a cumulative arrearage equal to six quarterly dividends, holders of all outstanding series of preferred shares (voting as a single class without regard to series) will have the right to elect two additional members to serve on our Board of Trustees (our “Board”) until the arrearage has been cured. At December 31, 2021, there were no dividends in arrears. The affirmative vote of at least 66.67% of the outstanding shares of a series of Preferred Shares is required for any material and adverse amendment to the terms of such series. The affirmative vote of at least 66.67% of the outstanding shares of all of our Preferred Shares, voting as a single class, is required to issue shares ranking senior to our Preferred Shares.
Except under certain conditions relating to the Company’s qualification as a REIT, the Preferred Shares are not redeemable prior to the dates indicated on the table above. On or after the respective dates, each of the series of Preferred Shares is redeemable at our option, in whole or in part, at $25.00 per depositary share, plus accrued and unpaid dividends. Holders of the Preferred Shares cannot require us to redeem such shares.
Upon issuance of our Preferred Shares, we classify the liquidation value as preferred equity on our consolidated balance sheet with any issuance costs recorded as a reduction to Paid-in capital.
During 2021, 2020, and 2019, we issued the following series of Preferred Shares at an issuance price of $25.00 per depository share with each depository share representing 0.001 of a share of Preferred Share (amounts in thousands):
YearSeriesSharesGross ProceedsIssuance Costs
2021P, Q and R47,300 $1,182,500 $35,045 
2020L, M, N and O49,900 1,247,500 39,294 
2019H, I, J and K43,600 1,090,000 30,844 
During 2021, 2020, and 2019, we redeemed the following series of Preferred Shares at par (amounts in thousands):
YearSeriesAggregate Redemption Amount
Allocation of Income to Preferred Shares Holders in Connection with Redemption
2021C, D and E$875,000 $28,914 
2020 (a)V, W, X and B1,520,000 48,265 
2019Y, Z, U and A1,050,000 32,693 
(a)On December 14, 2020, we called for redemption of, and on January 20, 2021, we redeemed Series B Preferred Shares. The liquidation value (at par) was reclassified as a liability as of December 31, 2020 and we recorded allocation of income to the holders of our Preferred Shares in 2020 in connection with this redemption.

Common Shares
During 2021, 2020, and 2019, activity with respect to the issuance of our common shares was as follows (dollar amounts in thousands):
202120202019
SharesAmountSharesAmountSharesAmount
Employee stock-based compensation and exercise of stock options (Note 11)552,713 $95,860 163,127 $12,664 287,734 $33,564 
Our Board previously authorized the repurchase from time to time of up to 35.0 million of our common shares on the open market or in privately negotiated transactions. Through December 31, 2021, we repurchased approximately 23.7 million shares pursuant to this authorization; none of which were repurchased during the three years ended December 31, 2021.
The unaudited characterization of dividends for U.S. federal corporate income tax purposes is made based upon earnings and profits of the Company, as defined by the Code. Common share dividends, including amounts paid to our restricted share unitholders, totaled $1.402 billion ($8.00 per share), $1.399 billion ($8.00 per share) and $1.399 billion ($8.00 per share) for the years ended December 31, 2021, 2020, and 2019, respectively. Preferred share dividends totaled $186.6 million, $207.1 million and $210.2 million for the years ended December 31, 2021, 2020, and 2019, respectively.
For the tax year ended December 31, 2021, distributions for the common shares and all the various series of preferred shares were classified as follows:
2021 (unaudited)
1st Quarter2nd Quarter3rd Quarter4th Quarter
Ordinary Dividends94.55 %94.54 %94.55 %94.57 %
Capital Gain Distributions5.45 %5.46 %5.45 %5.43 %
Total100.00 %100.00 %100.00 %100.00 %
The ordinary income dividends distributed for the tax year ended December 31, 2021 are not qualified dividends under the Internal Revenue Code; however, they are subject to the 20% deduction under IRS Section 199A.
v3.22.0.1
Related Party Transactions
12 Months Ended
Dec. 31, 2021
Related Party Transactions [Abstract]  
Related Party Transactions Related Party TransactionsAt December 31, 2021, Tamara Hughes Gustavson, a current member of our Board and her adult children owned and controlled 65 self-storage facilities in Canada. These facilities operate under the Public Storage® tradename, which we license to the owners of these facilities for use in Canada on a royalty-free, non-exclusive basis. We have no ownership interest in these facilities and we do not own or operate any facilities in Canada. If we chose to acquire or develop our own facilities in Canada, we would have to share the use of the Public Storage® name in Canada. We have a right of first refusal, subject to limitations, to acquire the stock or assets of the corporation engaged in the operation of these facilities if their owners agree to sell them. Our subsidiaries reinsure risks relating to loss of goods stored by customers in these facilities, and have received premium payments of approximately $2.1 million, $1.6 million and $1.5 million for the years ended December 31, 2021, 2020, and 2019, respectively.
v3.22.0.1
Share-Based Compensation
12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Share-Based Compensation Share-Based Compensation
Under various share-based compensation plans and under terms established or modified by our Board or a committee thereof, we grant non-qualified options to purchase the Company’s common shares, as well as RSUs, to trustees, officers, and key employees.
On April 26, 2021, the Company’s Shareholders approved the 2021 Equity and Performance-Based Incentive Compensation Plan ("2021 Plan"), which authorizes an additional three million shares available for future issuance of equity-based awards. As of December 31, 2021, there were a total of 2,252,321 shares reserved for granting of future options and stock awards under the 2021 plan.
We recorded share-based compensation expense associated with stock options and RSUs in the various expense categories in the Consolidated Statements of Income as set forth in the following table. In addition, $3.9 million share-based compensation cost was capitalized as real estate facilities for the year ended December 31, 2021.
 For Years Ended December 31,
 202120202019
 (Amounts in thousands)
Self-storage cost of operations$20,544 $14,904 $12,090 
Ancillary cost of operations1,561 — — 
General and administrative37,760 18,586 13,871 
Total$59,865 $33,490 $25,961 

Stock Options
Stock options vest over 3 to 5 years, expire 10 years after the grant date, and have an exercise price equal to the closing trading price of our common shares on the grant date. New shares are issued for options exercised. Employees cannot require the Company to settle their award in cash.
For the years ended December 31, 2021, 2020, and 2019, we incurred share-based compensation cost for outstanding stock options of $25.1 million, $7.6 million and $5.0 million, respectively. The amounts for the years ended December 31, 2021 and 2020 include $4.5 million and $0.3 million, respectively, in connection with the Retirement Acceleration as discussed in Note 2 (none for 2019).
During 2021, we incurred share-based compensation cost of $1.5 million in connection with the initial 15,000 stock option awards issued to each of the five trustees who joined our Board in January 2021.
During 2021, 245,000 stock options were awarded where vesting is dependent upon meeting certain performance targets with respect to 2021, 2022, and 2023 and continued service through 2025. These awards contain a relative Total Shareholder Return modifier that will adjust the payout based on relative performance as compared to the market. As of December 31, 2021, these targets are expected to be met at 100% achievement. These options resulted in $8.1 million in related compensation cost during 2021.
During 2020, 770,000 stock options were awarded where vesting is dependent upon meeting certain performance targets with respect to 2020, 2021, and 2022 and continued service through 2024. As of December 31, 2021, these targets are expected to be met at 125% achievement, an increase from 100% as of December 31, 2020. $10.9 million and $3.0 million in related compensation cost was recorded during 2021 and 2020, respectively.
The stock options outstanding at December 31, 2021 have an aggregate intrinsic value (the excess, if any, of each option’s market value over the exercise price) of approximately $481.9 million and remaining average contractual lives of approximately six years. Total compensation cost related to nonvested stock options that has not yet been recognized is $23.3 million and is expected to be recognized as compensation cost over approximately three years on average. Exercisable stock options have an aggregate intrinsic value of approximately $251.3 million at December 31, 2021 and remaining average contractual lives of approximately four years.
Additional information with respect to stock options during 2021, 2020, and 2019 is as follows:
Service-BasedPerformance-BasedTotal
Number
of
Options
Weighted
Average
Exercise
Price
per Share
Number
of
Options
Weighted
Average
Exercise
Price
per Share
Number
of
Options
Weighted
Average
Exercise
Price
per Share
Options outstanding January 1, 2019
2,420,922 $201.31 — $— 2,420,922 $201.31 
Granted120,000 — 120,000 
Exercised(191,255)— (191,255)
Cancelled(10,000)— (10,000)
Options outstanding December 31, 2019
2,339,667 $204.53 — $— 2,339,667 $204.53 
Granted70,000 770,000 840,000 
Exercised(71,500)— (71,500)
Cancelled(107,000)(40,000)(147,000)
Options outstanding December 31, 2020
2,231,167 $204.60 730,000 $228.94 2,961,167 $210.59 
Granted (a)140,000 420,000 560,000 
Exercised(471,216)— (471,216)
Cancelled— (10,000)(10,000)
Options outstanding December 31, 2021
1,899,951 $208.16 1,140,000 $229.16 3,039,951 $216.04 
Options exercisable at December 31, 2021
1,464,411 $202.97 — $— 1,464,411 $202.97 
202120202019
Aggregate exercise date intrinsic value of options exercised during the year (in 000's)$44,613$3,433$11,848
Average assumptions used in valuing options with the Black-Scholes method:
Expected life of options in years, based upon historical experience555
Risk-free interest rate0.8%0.4%2.3%
Expected volatility, based upon historical volatility24.1%21.6%8.9%
Expected dividend yield2.9%3.8%3.6%
Average assumptions used in valuing options with market conditions with the Monte-Carlo simulation method:
Expected life of options in years, based upon historical experience5
Risk-free interest rate0.9%
Expected volatility, based upon historical volatility26.5%
Expected dividend yield2.9%
Average estimated value of options granted during the year$62.66$17.79$9.61
(a) Amount granted for performance-based stock options includes performance adjustments above target for options granted in 2020.
Restricted Share Units
RSUs generally vest over 5 to 8 years from the grant date. The grantee receives dividends for each outstanding RSU equal to the per-share dividends received by our common shareholders. We expense any dividends previously paid upon forfeiture of the related RSU. Upon vesting, the grantee receives new common shares equal to the number of vested RSUs, less common shares withheld in exchange for tax deposits made by the Company to satisfy the grantee’s statutory tax liabilities arising from the vesting.
The fair value of our RSUs is determined based upon the applicable closing trading price of our common shares.
For the years ended December 31, 2021, 2020, and 2019, we incurred share-based compensation cost for RSUs of $38.7 million, $25.9 million and $21.0 million, respectively. The amounts for the years ended December 31, 2021 and 2020 include $11.4 million and $5.4 million, respectively, in connection with the Retirement Acceleration as discussed in Note 2 (none for 2019).
During 2021, 37,000 RSUs were awarded where vesting is dependent upon meeting certain performance targets for 2021. As of December 31, 2021, these targets were met at 125% achievement. These RSUs resulted in $6.4 million in related compensation cost during 2021.
Remaining compensation cost related to RSUs outstanding at December 31, 2021 totals approximately $94.1 million and is expected to be recognized over the next 3 years on average. The following tables set forth relevant information with respect to restricted shares (dollar amounts in thousands):
202120202019
Number of
Restricted
Share Units
Weighted-Average Grant-Date
Fair Value
Number of
Restricted
Share Units
Weighted-Average Grant-Date
Fair Value
Number of
Restricted
Share Units
Weighted-Average Grant-Date
Fair Value
Restricted share units outstanding January 1,552,788 $218.11 619,150 $213.29 717,696 $210.69 
Granted (a)189,318 $321.17 110,755 $222.27 97,140 $217.35 
Vested(138,420)$(216.63)(140,089)$(200.88)(160,329)$(204.04)
Forfeited(32,864)$(221.32)(37,028)$(215.08)(35,357)$(213.62)
Restricted share units outstanding December 31,570,822 $251.95 552,788 $218.11 619,150 $213.29 

202120202019
Amounts for the year (in 000's, except number of shares):
Fair value of vested shares on vesting date$37,430 $31,076 $33,769 
Cash paid for taxes upon vesting in lieu of issuing common shares$13,069 $10,518 $12,162 
Common shares issued upon vesting81,325 91,627 96,479 
(a)Amount includes adjustments above target for performance-based RSUs granted in fiscal year 2021 based on achievement of performance criteria.
v3.22.0.1
Net Income per Common Share
12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Net Income per Common Share Net Income per Common Share
We allocate net income to (i) noncontrolling interests based upon their contractual rights in the respective subsidiaries or for participating noncontrolling interests based upon their participation in both distributed and undistributed earnings of the Company, (ii) preferred shareholders, for distributions paid or payable, (iii) preferred shareholders, to the extent redemption cost exceeds the related original net issuance proceeds (an “preferred share redemption charge”) and (iv) restricted share units, for non-forfeitable dividends paid and adjusted for participation rights in undistributed earnings of the Company.
We calculate basic and diluted net income per common share based upon net income allocable to common shareholders, divided by (i) weighted average common shares for basic net income per common share, and (ii) weighted average common shares adjusted for the impact of dilutive, of stock options outstanding for diluted net income per common share.
The following table reconciles the numerators and denominators of the basic and diluted net income per common shares computation for the year ended December 31, 2021, 2020, and 2019 (in thousands, except per share amounts):
 For the Years Ended December 31,
 202120202019
Numerator for basic and dilutive net income per common share – net income allocable to common shareholders$1,732,444$1,098,335$1,272,767
Denominator for basic net income per share - weighted average common shares outstanding174,858174,494174,287
Net effect of dilutive stock options - based on treasury stock method710148243
Denominator for dilutive net income per share - weighted average common shares outstanding175,568174,642174,530
Net income per common share:
Basic$9.91$6.29$7.30
Dilutive$9.87$6.29$7.29
v3.22.0.1
Segment Information
12 Months Ended
Dec. 31, 2021
Segment Reporting [Abstract]  
Segment Information Segment Information
Our operating segments reflect the significant components of our operations where discrete financial information is evaluated separately by our chief operating decision maker (“CODM”).
Self-Storage Operations
The Self-Storage Operations reportable segment reflects the aggregated rental operations from the self-storage facilities we own from (i) Same Store Facilities, (ii) Acquired Facilities, (iii) Developed and Expanded Facilities, and (iv) Other Non-Same Store Facilities. The presentation in the table below sets forth the NOI of this reportable segment, as well as the related depreciation expense. For all periods presented, substantially all of our real estate facilities, goodwill and other intangible assets, other assets, and accrued and other liabilities are associated with the Self-Storage Operations reportable segment.
Ancillary Operations
The Ancillary Operations reflects the combined operations of our tenant loss reinsurance, merchandise sales, and third party property management operating segments.
Presentation of Segment Information
The following table reconciles NOI and net income attributable to our reportable segment to our consolidated net income:
 For the Years Ended December 31,
 202120202019
 (amounts in thousands)
Self-Storage Operations Reportable Segment
Revenue$3,203,566 $2,721,630 $2,684,552 
Cost of operations(852,030)(807,543)(762,416)
   Net operating income2,351,536 1,914,087 1,922,136 
Depreciation and amortization(713,428)(553,257)(512,918)
   Net income1,638,108 1,360,830 1,409,218 
Ancillary Operations
Revenue212,258 193,438 170,556 
Cost of operations(68,568)(59,919)(50,736)
   Net operating income143,690 133,519 119,820 
    Total net income allocated to segments1,781,798 1,494,349 1,529,038 
Other items not allocated to segments:
General and administrative(101,254)(83,199)(62,146)
Interest and other income12,306 22,323 26,683 
Interest expense(90,774)(56,283)(45,641)
Equity in earnings of unconsolidated real estate entities232,093 80,497 69,547 
Foreign currency exchange gain (loss)111,787 (97,953)7,829 
Gain on sale of real estate13,683 1,493 341 
     Net income$1,959,639 $1,361,227 $1,525,651 
v3.22.0.1
Commitments And Contingencies
12 Months Ended
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]  
Commitments And Contingencies Commitments and Contingencies
Contingent Losses
We are a party to various legal proceedings and subject to various claims and complaints; however, we believe that the likelihood of these contingencies resulting in a material loss to the Company, either individually or in the aggregate, is remote.
Insurance and Loss Exposure
We carry property, earthquake, general liability, employee medical insurance, and workers compensation coverage through internationally recognized insurance carriers, subject to deductibles. Our deductible for general liability is $2.0 million per occurrence. Our annual deductible for property loss is $25.0 million per occurrence. This deductible decreases to $5.0 million once we reach $35.0 million in aggregate losses for occurrences that exceed $5.0 million. Insurance carriers’ aggregate limits on these policies of $75.0 million for property losses and $102.0 million for general liability losses are higher than estimates of maximum probable losses that could occur from individual catastrophic events determined in recent engineering and actuarial studies; however, in case of multiple catastrophic events, these limits could be exceeded.
We reinsure a program that provides insurance to our customers from an independent third-party insurer. This program covers customer claims for losses to goods stored at our facilities as a result of specific named perils (earthquakes are not covered by this program), up to a maximum limit of $5,000 per storage unit. We reinsure all risks in this program, but purchase insurance to cover this exposure for a limit of $15.0 million for losses in excess of $5.0 million per occurrence. We are subject to licensing requirements and regulations in several states. Customers participate in the program at their option. At December 31, 2021, there were approximately 1.2 million certificates held by our self-storage customers, representing aggregate coverage of approximately $4.9 billion.
Commitments
We have construction commitments representing future expected payments for construction under contract totaling $166.8 million at December 31, 2021. We expect to pay approximately $142.7 million in 2022, $22.8 million in 2023 and $1.3 million in 2024 for these construction commitments.
We have future contractual payments on land, equipment and office space under various lease commitments totaling $66.1 million at December 31, 2021. We expect to pay approximately $3.1 million in 2022, $3.0 million in each of 2023 and 2024, $2.9 million in 2025, $3.0 million in 2026 and $51.1 million thereafter for these commitments.
v3.22.0.1
Subsequent Events
12 Months Ended
Dec. 31, 2021
Subsequent Events [Abstract]  
Subsequent Events Subsequent Events
Subsequent to December 31, 2021, we acquired or were under contract to acquire 15 self-storage facilities across 10 states with 1.2 million net rentable square feet, for $212.4 million.

On January 13, 2022, we issued 10.0 million depositary shares, each representing 0.001 of a share of our 4.100% Series S Preferred Shares, at an issuance price of $25.00 per depositary share, for a total of $250.0 million in gross proceeds, and we incurred $7.2 million in issuance costs.
v3.22.0.1
SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION
12 Months Ended
Dec. 31, 2021
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
Gross Carrying Amount At December 31, 2021
DescriptionNo. of
Facilities
Net
Rentable
Square Feet
2021
Encum-
brances
LandBuildings &
Improvements
Costs
Subsequent
to Acquisition
LandBuildingsTotalAccumulated
Depreciation
Self-storage facilities by market:
Los Angeles228 16,710 409 543,650 981,256 448,343 542,073 1,431,176 1,973,249 859,874 
Dallas/Ft. Worth189 17,017 — 322,316 1,852,445 143,451 323,778 1,994,434 2,318,212 335,716 
Houston142 11,953 — 220,019 620,942 246,434 219,340 868,055 1,087,395 345,675 
San Francisco140 9,196 — 245,623 557,398 266,677 258,373 811,325 1,069,698 521,635 
Chicago136 8,756 — 146,095 428,446 138,390 148,932 563,999 712,931 405,079 
Washington DC117 8,272 — 418,460 1,308,988 143,417 423,614 1,447,251 1,870,865 373,168 
Atlanta111 7,476 1,653 142,553 407,272 95,145 142,915 502,055 644,970 298,833 
Seattle/Tacoma100 6,986 — 211,959 584,089 123,883 212,607 707,324 919,931 379,516 
Miami97 7,223 — 247,807 536,321 145,494 249,700 679,922 929,622 365,471 
New York96 7,053 — 277,121 586,592 223,807 283,458 804,062 1,087,520 494,284 
Orlando/Daytona72 4,628 11,274 140,411 253,375 68,265 145,892 316,159 462,051 179,459 
Denver69 5,197 8,318 117,109 308,922 102,116 117,830 410,317 528,147 171,779 
Minneapolis/St. Paul64 4,937 1,630 118,333 292,465 97,660 118,498 389,960 508,458 148,047 
Philadelphia62 4,041 — 58,824 226,733 62,263 57,845 289,975 347,820 176,981 
Charlotte59 4,604 — 87,349 231,449 84,331 95,212 307,917 403,129 144,670 
Tampa57 3,969 — 93,109 213,546 61,429 96,422 271,662 368,084 142,716 
Detroit48 3,443 — 67,465 225,061 41,894 68,315 266,105 334,420 130,902 
Portland48 2,750 — 60,108 203,107 31,513 60,766 233,962 294,728 114,418 
Baltimore48 3,624 — 134,774 749,058 28,468 134,898 777,402 912,300 97,642 
Phoenix47 3,253 — 92,139 265,783 38,278 92,130 304,070 396,200 124,204 
West Palm Beach46 3,784 — 156,788 221,479 92,351 157,496 313,122 470,618 146,989 
San Antonio39 2,746 — 53,847 215,507 29,301 53,805 244,850 298,655 74,698 
Austin36 2,875 — 67,832 179,672 46,412 69,854 224,062 293,916 99,914 
Raleigh36 2,592 — 82,919 188,198 40,568 83,908 227,777 311,685 73,417 
Norfolk36 2,215 — 47,728 128,986 26,380 46,843 156,251 203,094 77,313 
Sacramento35 2,054 — 26,429 80,391 40,500 26,913 120,407 147,320 84,912 
Indianapolis29 1,889 — 34,678 94,858 18,348 35,678 112,206 147,884 52,872 
Kansas City29 1,893 — 18,965 92,793 36,452 19,165 129,045 148,210 65,887 
Boston28 1,964 — 80,843 209,495 37,378 81,409 246,307 327,716 112,364 
St. Louis28 1,749 — 23,539 89,341 33,541 23,395 123,026 146,421 67,368 
Columbus27 2,015 — 44,983 92,001 28,923 45,090 120,817 165,907 53,150 
Columbia27 1,620 — 27,177 83,532 23,010 27,936 105,783 133,719 43,214 
Oklahoma City26 2,089 — 49,060 130,815 14,475 49,060 145,290 194,350 31,501 
San Diego24 2,183 — 89,782 162,043 50,358 92,292 209,891 302,183 102,116 
Las Vegas23 1,503 — 26,242 90,624 13,313 25,491 104,688 130,179 53,896 
Cincinnati20 1,155 — 19,035 57,775 23,981 18,953 81,838 100,791 34,959 
Initial Cost
Gross Carrying Amount At December 31, 2021
DescriptionNo. of
Facilities
Net
Rentable
Square Feet
2021
Encum-
brances
LandBuildings &
Improvements
Costs
Subsequent
to Acquisition
LandBuildingsTotalAccumulated
Depreciation
Nashville/Bowling Green18 1,168 — 23,487 45,145 31,187 23,485 76,334 99,819 33,956 
Colorado Springs16 1,115 — 12,320 60,393 22,949 12,317 83,345 95,662 32,637 
Milwaukee15 964 — 13,189 32,071 10,534 13,158 42,636 55,794 35,990 
Louisville15 912 — 23,563 46,108 8,315 23,562 54,424 77,986 18,843 
Jacksonville15 922 — 14,454 47,415 12,466 14,503 59,832 74,335 35,892 
Birmingham15 606 — 6,316 25,567 14,343 6,204 40,022 46,226 29,192 
Richmond15 749 — 20,979 52,239 6,343 20,784 58,777 79,561 22,365 
Greensboro14 845 — 13,413 35,326 14,407 15,502 47,644 63,146 29,562 
Charleston14 943 — 16,947 56,793 18,448 17,923 74,265 92,188 30,179 
Fort Myers/Naples14 1,070 — 29,944 84,343 6,276 30,179 90,384 120,563 23,207 
Chattanooga13 846 — 10,030 45,578 7,832 9,832 53,608 63,440 17,516 
Savannah12 700 — 33,094 42,465 5,271 31,766 49,064 80,830 20,497 
Greensville/Spartanburg/Asheville12 697 — 9,835 30,482 10,542 10,764 40,095 50,859 23,304 
Honolulu11 807 — 54,184 106,299 16,942 55,101 122,324 177,425 73,250 
Hartford/New Haven11 693 — 6,778 19,959 22,722 8,443 41,016 49,459 34,787 
New Orleans11 772 — 13,372 59,382 7,783 13,540 66,997 80,537 28,812 
Salt Lake City11 672 — 15,912 28,117 5,603 15,561 34,071 49,632 16,134 
Memphis11 645 — 19,581 29,852 9,956 20,934 38,455 59,389 23,494 
Mobile11 529 — 8,915 25,223 5,814 8,742 31,210 39,952 15,416 
Omaha10 881 — 17,266 64,969 4,245 17,266 69,214 86,480 7,034 
Buffalo/Rochester462 — 6,785 17,954 4,159 6,783 22,115 28,898 15,388 
Cleveland/Akron478 — 4,235 18,411 5,730 4,628 23,748 28,376 13,911 
Augusta466 — 8,900 20,906 4,497 8,900 25,403 34,303 7,844 
Reno559 — 5,487 18,704 4,277 5,487 22,981 28,468 13,707 
Tucson439 — 9,403 25,491 6,959 9,884 31,969 41,853 21,627 
Wichita433 — 2,017 6,691 7,411 2,130 13,989 16,119 12,367 
Monterey/Salinas329 — 8,465 24,151 6,750 8,455 30,911 39,366 23,392 
Boise530 — 13,412 55,496 545 13,412 56,041 69,453 1,443 
Evansville326 — 2,340 14,316 1,513 2,312 15,857 18,169 4,950 
Dayton284 — 1,074 8,975 4,868 1,073 13,844 14,917 7,937 
Huntsville/Decatur298 — 9,161 13,481 3,421 9,108 16,955 26,063 6,611 
Fort Wayne271 — 3,487 11,003 3,507 3,487 14,510 17,997 6,181 
Roanoke224 — 5,093 18,091 973 5,093 19,064 24,157 3,902 
Palm Springs242 — 8,309 18,065 2,249 8,309 20,314 28,623 12,060 
Providence155 — 995 11,206 3,143 995 14,349 15,344 7,414 
Shreveport150 — 817 3,030 2,377 741 5,483 6,224 4,997 
Springfield/Holyoke144 — 1,428 3,380 1,952 1,427 5,333 6,760 5,114 
Initial Cost
Gross Carrying Amount At December 31, 2021
DescriptionNo. of
Facilities
Net
Rentable
Square Feet
2021
Encum-
brances
LandBuildings &
Improvements
Costs
Subsequent
to Acquisition
LandBuildingsTotalAccumulated
Depreciation
Rochester99 — 1,047 2,246 2,134 980 4,447 5,427 4,233 
Santa Barbara98 — 5,733 9,106 858 5,733 9,964 15,697 6,186 
Topeka94 — 225 1,419 2,108 225 3,527 3,752 3,190 
Lansing88 — 556 2,882 986 556 3,868 4,424 2,619 
Flint56 — 543 3,068 273 542 3,342 3,884 2,110 
Joplin56 — 264 904 1,021 264 1,925 2,189 1,672 
Syracuse55 — 545 1,279 862 545 2,141 2,686 2,066 
Modesto/Fresno/Stockton33 — 44 206 1,324 193 1,381 1,574 942 
Commercial and non-operating real estate— 13,194 26,143 48,112 13,346 74,103 87,449 44,739 
2,787 198,319 $23,284 $5,072,209 $14,225,088 $3,510,536 $5,134,060 $17,673,773 $22,807,833 $7,773,308 
Note: Buildings and improvements are depreciated on a straight-line basis over estimated useful lives ranging generally between 5 to 25 years. In addition, disclosures of the number and square footage of our facilities are unaudited.
v3.22.0.1
Basis of Presentation and Summary of Significant Accounting Policies (Policy)
12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Basis of Presentation Basis of PresentationThe consolidated financial statements are presented on an accrual basis in accordance with U.S. generally accepted accounting principles (“GAAP”) as set forth in the Accounting Standards Codification of the Financial Accounting Standards Board (“FASB”), and in conformity with the rules and regulations of the Securities and Exchange Commission (“SEC”).
Consolidation and Equity Method of Accounting
Consolidation and Equity Method of Accounting
We consider entities to be Variable Interest Entities (“VIEs”) when they have insufficient equity to finance their activities without additional subordinated financial support provided by other parties, or the equity holders as a group do not have a controlling financial interest. In addition, we have general partner interests in limited partnerships along with third-party investors to develop, construct or operate self-storage facilities. As the general partner, we consider the limited partnerships to be VIEs if the limited partners lack both substantive participating rights and substantive kick-out rights. We consolidate VIEs when we have (i) the power to direct the activities most significantly impacting economic performance, and (ii) either the obligation to absorb losses or the right to receive benefits from the VIE. The total assets, primarily real estate assets, and the total liabilities of our consolidated VIEs are not material as of December 31, 2021. We consolidate all other entities when we control them through voting shares or contractual rights. We refer to the entities we consolidate, for the period in which the reference applies, collectively as the “Subsidiaries,” and we eliminate intercompany transactions and balances.
We account for our investments in entities that we do not consolidate but over which we have significant influence using the equity method of accounting. We refer to these entities, for the periods in which the reference applies, collectively as the “Unconsolidated Real Estate Entities,” and we eliminate intra-entity profits and losses and amortize any differences between the cost of our investment and the underlying equity in net assets against equity in earnings as if the Unconsolidated Real Estate Entity were a consolidated subsidiary.
Equity in earnings of unconsolidated real estate entities presented on our income statements represents our pro-rata share of the earnings of the Unconsolidated Real Estate Entities. The dividends we receive from the Unconsolidated Real Estate Entities are reflected on our consolidated statements of cash flows as “distributions from cumulative equity in earnings of unconsolidated real estate entities” to the extent of our cumulative equity in earnings, with any excess classified as “distributions in excess of cumulative equity in earnings from unconsolidated real estate entities.”
Use of Estimates
Use of Estimates
The preparation of consolidated financial statements and accompanying notes in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported. Actual results could differ from those estimates and assumptions.
Cash Equivalents, Restricted Cash and Marketable Securities
Cash Equivalents and Restricted Cash
Cash equivalents represent highly liquid financial instruments that mature within three months of acquisition such as money market funds with a rating of at least AAA by Standard & Poor's, commercial paper that is rated A1 by Standard & Poor's or deposits with highly rated commercial banks. Restricted cash, which represent amounts used to collateralize our insurance obligations and are restricted from general corporate use, are included in other assets.
Fair Value
Fair Value
As used herein, the term “fair value” is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. In the absence of active markets for identical assets or liabilities, such measurements involve developing assumptions based on market observable data and, in the absence of such data, internal information that is consistent with what market participants would use in a hypothetical transaction that occurs at the balance sheet date.
Assets and liabilities recorded at fair value are measured and classified in accordance with a three-tier fair value hierarchy based on the observability of the inputs available in the market used to measure fair value:
Level 1 Quoted prices in active markets for identical assets or liabilities at the measurement date.
Level 2 Significant observable inputs other than Level 1, that are observable for the asset or liability, either directly or indirectly through corroboration with observable market data.
Level 3 Unobservable inputs that are supported by little or no market data for the related assets or liabilities.
The categorization of a financial instrument within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement.
Our financial instruments consist of cash and cash equivalents, restricted cash, other assets, other liabilities, and notes payable. Cash equivalents, restricted cash, other assets and other liabilities are stated at book value, which approximates fair value as of the balance sheet date due to the short time period to maturity.
We estimate and disclose the fair value of our notes payable using Level 2 inputs by discounting the related future cash flows at a rate based upon quoted interest rates for securities that have similar characteristics such as credit quality and time to maturity.
We use significant judgment to estimate fair values of real estate facilities, goodwill, and other intangible assets for the purposes of purchase price allocation or impairment analysis. In estimating their values, we consider Level 3 inputs such as market prices of land, market capitalization rates, expected returns, earnings multiples, projected levels of earnings, costs of construction, and functional depreciation.
Real Estate Facilities
Real Estate Facilities
We record real estate facilities at cost. We capitalize all costs incurred to acquire, develop, construct, renovate and improve facilities as part of major repair and maintenance programs, including interest and property taxes incurred during the construction period. We expense the costs of demolition of existing facilities associated with a renovation as incurred. We allocate the net acquisition cost of acquired real estate facilities to the underlying land, buildings, and identified intangible assets based upon their respective individual estimated fair values.
We expense costs associated with dispositions of real estate, as well as routine repairs and maintenance costs, as incurred. We depreciate buildings and improvements on a straight-line basis over estimated useful lives ranging generally between 5 to 25 years.
When we sell a full or partial interest in a real estate facility without retaining a controlling interest following sale, we recognize a gain or loss on sale as if 100% of the property was sold at fair value. If we retain a controlling interest following the sale, we record a noncontrolling interest for the book value of the partial interest sold, and recognize additional paid-in capital for the difference between the consideration received and the partial interest at book value.
Goodwill and Other Intangible Assets
Goodwill and Other Intangible Assets
Intangible assets consist of goodwill, the Shurgard® trade name, which Shurgard uses pursuant to a fee-based licensing agreement, and finite-lived assets. Goodwill and the Shurgard® trade name have indefinite lives and are not amortized. Our finite-lived assets consist primarily of (i) acquired customers in place amortized relative to the benefit of the customers in place, with such amortization reflected as depreciation and amortization expense on our income statement and (ii) property tax abatements acquired and amortized relative to the reduction in property tax paid, with such amortization reflected as self-storage cost of operations on our income statement.
Evaluation of Asset Impairment
Evaluation of Asset Impairment
We evaluate our real estate and finite-lived intangible assets for impairment each quarter. If there are indicators of impairment and we determine that the asset is not recoverable from future undiscounted cash flows to be received through the asset’s remaining life (or, if earlier, the expected disposal date), we record an impairment charge to the extent the carrying amount exceeds the asset’s estimated fair value or net proceeds from expected disposal.
We evaluate our investments in unconsolidated real estate entities for impairment quarterly. We record an impairment charge to the extent the carrying amount exceeds estimated fair value, when we believe any such shortfall is other than temporary.
We evaluate goodwill for impairment annually and whenever relevant events, circumstances, and other related factors indicate that fair value of the related reporting unit may be less than the carrying amount. If we determine that the fair value of the reporting unit exceeds the aggregate carrying amount, no impairment charge is recorded. Otherwise, we record an impairment charge to the extent the carrying amount of the goodwill exceeds the amount that would be allocated to goodwill if the reporting unit were acquired for estimated fair value.
We evaluate other indefinite-lived intangible assets, such as the Shurgard® trade name for impairment at least annually and whenever relevant events, circumstances and other related factors indicate that the fair value is less than the carrying amount. When we conclude that it is likely that the asset is not impaired, we do not record an impairment charge and no further analysis is performed. Otherwise, we record an impairment charge to the extent the carrying amount exceeds the asset’s estimated fair value.
Revenue and Expense Recognition
Revenue and Expense Recognition
We recognize revenues from self-storage facilities, which primarily comprise rental income earned pursuant to month-to-month leases, as well as associated late charges and administrative fees, as earned. Promotional discounts
reduce rental income over the promotional period, which is generally one month. We recognize ancillary revenues when earned. We accrue for property tax expense based upon actual amounts billed and, in some circumstances, estimates when bills or assessments have not been received from the taxing authorities. If these estimates are incorrect, the timing and amount of expense recognition could be incorrect. We expense cost of operations (including advertising expenditures), general and administrative expense, and interest expense as incurred.
Foreign Currency Exchange Translation
Foreign Currency Exchange Translation
The local currency (primarily the Euro) is the functional currency for our interests in foreign operations. The related balance sheet amounts are translated into U.S. Dollars at the exchange rates at the respective financial statement date, while amounts on our consolidated statements of income are translated at the average exchange rates during the respective period. Cumulative translation adjustments, to the extent not included in cumulative net income, are included in equity as a component of accumulated other comprehensive income (loss).
When financial instruments denominated in a currency other than the U.S. Dollar are expected to be settled in cash in the foreseeable future, the impact of changes in the U.S. Dollar equivalent are reflected in current earnings.
At December 31, 2021, due primarily to our investment in Shurgard (Note 4) and our notes payable denominated in Euros (Note 7), our operating results and financial position are affected by fluctuations in currency exchange rates between the Euro, and to a lesser extent, other European currencies, against the U.S. Dollar.
Income Taxes
Income Taxes
We have elected to be treated as a REIT, as defined in the Internal Revenue Code of 1986, as amended (the “Code”). For each taxable year in which we qualify for taxation as a REIT, we will not be subject to U.S. federal corporate income tax on our “REIT taxable income” (generally, taxable income subject to specified adjustments, including a deduction for dividends paid and excluding our net capital gain) that is distributed to our shareholders. We believe we have met these REIT requirements for all periods presented herein. Accordingly, we have recorded no U.S. federal corporate income tax expense related to our REIT taxable income.
Our tenant reinsurance, merchandise, and third party management operations are subject to corporate income tax and such taxes are included in general and administrative expenses. We also incur income and other taxes in certain states, which are included in general and administrative expense.
We recognize tax benefits of uncertain income tax positions that are subject to audit only if we believe it is more likely than not that the position would ultimately be sustained assuming the relevant taxing authorities had full knowledge of the relevant facts and circumstances of our positions.
Share-Based Compensation
Share-Based Compensation
We generally estimate the fair value of share-based payment awards on the date of grant. We determine the fair value of restricted share units ("RSUs") based on the closing market price of the Company’s common stock on the date of grant. We value stock options with no market conditions at the grant date using the Black-Scholes option-pricing model. We value stock options with market conditions at the grant date using a Monte-Carlo valuation simulation. Our determination of the fair value of share-based payment awards on the date of grant using an option-pricing model or Monte-Carlo valuation simulation is affected by our stock price as well as assumptions regarding a number of subjective and complex variables. These variables include, but are not limited to, our expected stock price volatility over the expected term of the awards and actual and projected stock option exercise behaviors. For performance-based restricted share units and stock options, we adjust compensation cost each quarter as needed for any changes in the assessment of the probability that the specified performance criteria will be achieved.
We amortize the grant-date fair value of awards as compensation expense over the service period, which begins on the grant date and ends on the expected vesting date. For awards that are earned solely upon the passage of time and continued service, the entire cost of the award is amortized on a straight-line basis over the service period. For awards with market and/or performance conditions, the individual cost of each vesting is amortized separately over each individual service period (the “accelerated attribution” method). The estimated number of stock awards that will ultimately vest requires judgment, and to the extent actual results or updated estimates differ from our current estimates, such amounts will be recorded as a cumulative adjustment in the period estimates are revised. In amortizing share-based compensation expense, we do not estimate future forfeitures. Instead, we reverse previously amortized share-based compensation expense with respect to grants that are forfeited in the period the employee terminates employment.
In July 2020, we modified our share-based compensation plans to allow immediate vesting upon retirement (“Retirement Acceleration”), and to extend the exercisability of outstanding stock options up to a year after retirement, for currently outstanding and future grants. Prior to the modification, unvested awards were forfeited, and outstanding vested stock options were cancelled, upon retirement. Employees are eligible for Retirement Acceleration if they meet certain conditions including length of service, age, notice of intent to retire, and facilitation of succession for their role. This modification results in accelerating amortization of compensation expense for each grant by changing the end of the service period from the original vesting date to the date an employee is expected to be eligible for Retirement Acceleration, if earlier.
v3.22.0.1
Real Estate Facilities (Tables)
12 Months Ended
Dec. 31, 2021
Real Estate [Abstract]  
Schedule Of Real Estate Activities
Activity in real estate facilities during 2021, 2020, and 2019 is as follows:
For the Years Ended December 31,
 202120202019
 (Amounts in thousands)
Operating facilities, at cost:
Beginning balance $17,372,627 $16,289,146 $15,296,844 
Capital expenditures to maintain real estate facilities284,200 163,834 192,539 
Acquisitions 4,940,413 781,219 421,097 
Dispositions(7,408)(303)(426)
Developed or expanded facilities opened for operation218,001 138,731 379,092 
Ending balance 22,807,833 17,372,627 16,289,146 
Accumulated depreciation:
Beginning balance (7,152,135)(6,623,475)(6,140,072)
Depreciation expense (625,968)(528,660)(483,408)
Dispositions4,795 — 
Ending balance (7,773,308)(7,152,135)(6,623,475)
Construction in process:
Beginning balance 188,079 141,934 285,339 
Costs incurred to develop and expand real estate facilities302,393 188,102 235,687 
Write-off of cancelled projects— (3,226)— 
Developed or expanded facilities opened for operation(218,001)(138,731)(379,092)
Ending balance 272,471 188,079 141,934 
Total real estate facilities at December 31,
$15,306,996 $10,408,571 $9,807,605 
v3.22.0.1
Investments in Unconsolidated Real Estate Entities (Tables)
12 Months Ended
Dec. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]  
Schedule of Investments in Real Estate Entities And Equity in Earnings of Real Estate Entities
The following table sets forth our investments in, and equity in earnings of, the Unconsolidated Real Estate Entities (amounts in thousands):
 Investments in Unconsolidated Real Estate Entities at December 31,Equity in Earnings of Unconsolidated Real Estate for the Year Ended December 31,
 20212020202120202019
PSB $515,312$431,963$207,722$64,835$54,090
Shurgard313,451341,08324,37115,66215,457
Total $828,763$773,046$232,093$80,497$69,547
Summarized Financial Information of Equity Method Investments
The following tables represent summarized financial information for PSB and Shurgard in aggregate derived from their respective reported financial statements prepared under US GAAP before our basis difference adjustments for the years ended December 31, 2021, 2020, and 2019 (amounts in thousands):

 Year Ended December 31,
 202120202019
Revenues$790,461$721,393$713,867
Costs of operations 263,398242,992237,586
Operating income333,624290,901288,179
Gain on sale of real estate359,90427,23416,641
Net Income639,062275,680268,054

 At December 31,
 20212020
Real estate assets$3,437,115$3,353,862
Other assets481,403374,615
Total assets $3,918,518$3,728,477
Debt $943,276$742,390
Other liabilities 298,787274,950
Noncontrolling interests 262,243221,630
Shareholders' equity2,414,2122,489,507
Total liabilities and equity$3,918,518$3,728,477
v3.22.0.1
Goodwill and Other Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Finite-Lived Intangible Assets
Goodwill and other intangible assets consisted of the following (amounts in thousands):
At December 31, 2021At December 31, 2020
Gross Book ValueAccumulated AmortizationNet Book ValueGross Book ValueAccumulated AmortizationNet Book Value
Goodwill$165,843 $— $165,843 $165,843 $— $165,843 
Shurgard® Trade Name18,824 — 18,824 18,824 — 18,824 
Finite-lived intangible assets, subject to amortization198,180 (79,953)118,227 47,321 (27,334)19,987 
Total goodwill and other intangible assets$382,847 $(79,953)$302,894 $231,988 $(27,334)$204,654 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense The estimated future amortization expense for our finite-lived intangible assets at December 31, 2021 is as follows (amounts in thousands):
YearAmount
2022$86,759 
202324,417
Thereafter7,051 
Total$118,227 
v3.22.0.1
Notes Payable (Tables)
12 Months Ended
Dec. 31, 2021
Notes Payable [Abstract]  
Notes Payable Our notes payable at December 31, 2021 and 2020 are set forth in the tables below:
   
Amounts at December 31, 2021
 Coupon RateEffective Rate PrincipalUnamortized CostsBook
 Value
Fair
 Value
   ($ amounts in thousands)
U.S. Dollar Denominated Unsecured Debt
Notes due September 15, 2022
2.370%2.483%$500,000 $(363)$499,637 $506,362 
Notes due April 23, 2024
SOFR+0.47%
0.617%700,000 (1,628)698,372 700,314 
Notes due February 15, 2026
0.875%1.030%500,000 (3,061)496,939 488,141 
Notes due November 9, 20261.500%1.640%650,000 (4,227)645,773 649,996 
Notes due September 15, 2027
3.094%3.218%500,000 (3,020)496,980 535,206 
Notes due May 1, 2028
1.850%1.962%650,000 (4,276)645,724 649,221 
Notes due November 9, 20281.950%2.044%550,000 (3,299)546,701 548,241 
Notes due May 1, 2029
3.385%3.459%500,000 (2,257)497,743 545,580 
Notes due May 1, 2031
2.300%2.419%650,000 (6,383)643,617 656,546 
Notes due November 9, 20312.250%2.322%550,000 (3,488)546,512 551,932 
 5,750,000 (32,002)5,717,998 5,831,539 
Euro Denominated Unsecured Debt
Notes due April 12, 2024
1.540%1.540%113,431 — 113,431 117,526 
Notes due November 3, 2025
2.175%2.175%274,518 — 274,518 295,256 
Notes due September 9, 20300.500%0.640%794,017 (9,730)784,287 769,561 
Notes due January 24, 2032
0.875%0.978%567,155 (5,394)561,761 551,842 
   1,749,121 (15,124)1,733,997 1,734,185 
 Mortgage Debt, secured by 11 real estate facilities with a net book value of $66.1 million
3.878%3.897%23,284 — 23,284 24,208 
 $7,522,405 $(47,126)$7,475,279 $7,589,932 
Amounts at
 December 31, 2020
 Book ValueFair Value
 ($ amounts in thousands)
U.S. Dollar Denominated Unsecured Debt
Notes due September 15, 2022
$499,109 $517,419 
Notes due September 15, 2027
496,452 560,833 
Notes due May 1, 2029
497,433 574,833 
 1,492,994 1,653,085 
Euro Denominated Unsecured Debt
Notes due April 12, 2024
122,646 129,192 
Notes due November 3, 2025
296,821 323,552 
Notes due January 24, 2032
607,301 634,389 
 1,026,768 1,087,133 
Mortgage Debt25,230 26,958 
 $2,544,992 $2,767,176 
Maturities Of Notes Payable
At December 31, 2021, approximate principal maturities of our Notes Payable are as follows (amounts in thousands):
 Unsecured DebtMortgage DebtTotal
2022$500,000$2,483$502,483
202319,21919,219
2024813,431124813,555
2025274,518131274,649
20261,150,0001381,150,138
Thereafter 4,761,1721,1894,762,361
$7,499,121$23,284$7,522,405
Weighted average effective rate 1.8%3.9%1.8%
v3.22.0.1
Shareholders' Equity (Tables)
12 Months Ended
Dec. 31, 2021
Stockholders' Equity Note [Abstract]  
Schedule of Preferred Shares
At December 31, 2021 and 2020, we had the following series of Cumulative Preferred Shares (“Preferred Shares”) outstanding:

   
At December 31, 2021
At December 31, 2020
SeriesEarliest Redemption DateDividend RateShares OutstandingLiquidation PreferenceShares OutstandingLiquidation Preference
   (Dollar amounts in thousands)
Series C5/17/20215.125 %— $— 8,000 $200,000 
Series D7/20/20214.950 %— — 13,000 325,000 
Series E10/14/20214.900 %— — 14,000 350,000 
Series F6/2/20225.150 %11,200 280,000 11,200 280,000 
Series G8/9/20225.050 %12,000 300,000 12,000 300,000 
Series H3/11/20245.600 %11,400 285,000 11,400 285,000 
Series I9/12/20244.875 %12,650 316,250 12,650 316,250 
Series J11/15/20244.700 %10,350 258,750 10,350 258,750 
Series K12/20/20244.750 %9,200 230,000 9,200 230,000 
Series L6/17/20254.625 %22,600 565,000 22,600 565,000 
Series M8/14/20254.125 %9,200 230,000 9,200 230,000 
Series N10/6/20253.875 %11,300 282,500 11,300 282,500 
Series O11/17/20253.900 %6,800 170,000 6,800 170,000 
Series P6/16/20264.000 %24,150 603,750 — — 
Series Q8/17/20263.950 %5,750 143,750 — — 
Series R11/19/20264.000 %17,400 435,000 — — 
Total Preferred Shares164,000 $4,100,000 151,700 $3,792,500 
During 2021, 2020, and 2019, we issued the following series of Preferred Shares at an issuance price of $25.00 per depository share with each depository share representing 0.001 of a share of Preferred Share (amounts in thousands):
YearSeriesSharesGross ProceedsIssuance Costs
2021P, Q and R47,300 $1,182,500 $35,045 
2020L, M, N and O49,900 1,247,500 39,294 
2019H, I, J and K43,600 1,090,000 30,844 
During 2021, 2020, and 2019, we redeemed the following series of Preferred Shares at par (amounts in thousands):
YearSeriesAggregate Redemption Amount
Allocation of Income to Preferred Shares Holders in Connection with Redemption
2021C, D and E$875,000 $28,914 
2020 (a)V, W, X and B1,520,000 48,265 
2019Y, Z, U and A1,050,000 32,693 
(a)On December 14, 2020, we called for redemption of, and on January 20, 2021, we redeemed Series B Preferred Shares. The liquidation value (at par) was reclassified as a liability as of December 31, 2020 and we recorded allocation of income to the holders of our Preferred Shares in 2020 in connection with this redemption.
Schedule of Issuance and Repurchases of Common Shares
During 2021, 2020, and 2019, activity with respect to the issuance of our common shares was as follows (dollar amounts in thousands):
202120202019
SharesAmountSharesAmountSharesAmount
Employee stock-based compensation and exercise of stock options (Note 11)552,713 $95,860 163,127 $12,664 287,734 $33,564 
Schedule of Distribution Classification
For the tax year ended December 31, 2021, distributions for the common shares and all the various series of preferred shares were classified as follows:
2021 (unaudited)
1st Quarter2nd Quarter3rd Quarter4th Quarter
Ordinary Dividends94.55 %94.54 %94.55 %94.57 %
Capital Gain Distributions5.45 %5.46 %5.45 %5.43 %
Total100.00 %100.00 %100.00 %100.00 %
v3.22.0.1
Share-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Share-Based Compensation Expense
We recorded share-based compensation expense associated with stock options and RSUs in the various expense categories in the Consolidated Statements of Income as set forth in the following table. In addition, $3.9 million share-based compensation cost was capitalized as real estate facilities for the year ended December 31, 2021.
 For Years Ended December 31,
 202120202019
 (Amounts in thousands)
Self-storage cost of operations$20,544 $14,904 $12,090 
Ancillary cost of operations1,561 — — 
General and administrative37,760 18,586 13,871 
Total$59,865 $33,490 $25,961 
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award
Additional information with respect to stock options during 2021, 2020, and 2019 is as follows:
Service-BasedPerformance-BasedTotal
Number
of
Options
Weighted
Average
Exercise
Price
per Share
Number
of
Options
Weighted
Average
Exercise
Price
per Share
Number
of
Options
Weighted
Average
Exercise
Price
per Share
Options outstanding January 1, 2019
2,420,922 $201.31 — $— 2,420,922 $201.31 
Granted120,000 — 120,000 
Exercised(191,255)— (191,255)
Cancelled(10,000)— (10,000)
Options outstanding December 31, 2019
2,339,667 $204.53 — $— 2,339,667 $204.53 
Granted70,000 770,000 840,000 
Exercised(71,500)— (71,500)
Cancelled(107,000)(40,000)(147,000)
Options outstanding December 31, 2020
2,231,167 $204.60 730,000 $228.94 2,961,167 $210.59 
Granted (a)140,000 420,000 560,000 
Exercised(471,216)— (471,216)
Cancelled— (10,000)(10,000)
Options outstanding December 31, 2021
1,899,951 $208.16 1,140,000 $229.16 3,039,951 $216.04 
Options exercisable at December 31, 2021
1,464,411 $202.97 — $— 1,464,411 $202.97 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
202120202019
Aggregate exercise date intrinsic value of options exercised during the year (in 000's)$44,613$3,433$11,848
Average assumptions used in valuing options with the Black-Scholes method:
Expected life of options in years, based upon historical experience555
Risk-free interest rate0.8%0.4%2.3%
Expected volatility, based upon historical volatility24.1%21.6%8.9%
Expected dividend yield2.9%3.8%3.6%
Average assumptions used in valuing options with market conditions with the Monte-Carlo simulation method:
Expected life of options in years, based upon historical experience5
Risk-free interest rate0.9%
Expected volatility, based upon historical volatility26.5%
Expected dividend yield2.9%
Average estimated value of options granted during the year$62.66$17.79$9.61
(a) Amount granted for performance-based stock options includes performance adjustments above target for options granted in 2020.
Share-based Payment Arrangement, Restricted Stock Unit, Activity The following tables set forth relevant information with respect to restricted shares (dollar amounts in thousands):
202120202019
Number of
Restricted
Share Units
Weighted-Average Grant-Date
Fair Value
Number of
Restricted
Share Units
Weighted-Average Grant-Date
Fair Value
Number of
Restricted
Share Units
Weighted-Average Grant-Date
Fair Value
Restricted share units outstanding January 1,552,788 $218.11 619,150 $213.29 717,696 $210.69 
Granted (a)189,318 $321.17 110,755 $222.27 97,140 $217.35 
Vested(138,420)$(216.63)(140,089)$(200.88)(160,329)$(204.04)
Forfeited(32,864)$(221.32)(37,028)$(215.08)(35,357)$(213.62)
Restricted share units outstanding December 31,570,822 $251.95 552,788 $218.11 619,150 $213.29 
Share Based Compensation Shares Vesting During Year
202120202019
Amounts for the year (in 000's, except number of shares):
Fair value of vested shares on vesting date$37,430 $31,076 $33,769 
Cash paid for taxes upon vesting in lieu of issuing common shares$13,069 $10,518 $12,162 
Common shares issued upon vesting81,325 91,627 96,479 
(a)Amount includes adjustments above target for performance-based RSUs granted in fiscal year 2021 based on achievement of performance criteria.
v3.22.0.1
Net Income per Common Share (Tables)
12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Net Income Per Common Share
The following table reconciles the numerators and denominators of the basic and diluted net income per common shares computation for the year ended December 31, 2021, 2020, and 2019 (in thousands, except per share amounts):
 For the Years Ended December 31,
 202120202019
Numerator for basic and dilutive net income per common share – net income allocable to common shareholders$1,732,444$1,098,335$1,272,767
Denominator for basic net income per share - weighted average common shares outstanding174,858174,494174,287
Net effect of dilutive stock options - based on treasury stock method710148243
Denominator for dilutive net income per share - weighted average common shares outstanding175,568174,642174,530
Net income per common share:
Basic$9.91$6.29$7.30
Dilutive$9.87$6.29$7.29
v3.22.0.1
Segment Information (Tables)
12 Months Ended
Dec. 31, 2021
Segment Reporting [Abstract]  
Summary Of Segment Information
The following table reconciles NOI and net income attributable to our reportable segment to our consolidated net income:
 For the Years Ended December 31,
 202120202019
 (amounts in thousands)
Self-Storage Operations Reportable Segment
Revenue$3,203,566 $2,721,630 $2,684,552 
Cost of operations(852,030)(807,543)(762,416)
   Net operating income2,351,536 1,914,087 1,922,136 
Depreciation and amortization(713,428)(553,257)(512,918)
   Net income1,638,108 1,360,830 1,409,218 
Ancillary Operations
Revenue212,258 193,438 170,556 
Cost of operations(68,568)(59,919)(50,736)
   Net operating income143,690 133,519 119,820 
    Total net income allocated to segments1,781,798 1,494,349 1,529,038 
Other items not allocated to segments:
General and administrative(101,254)(83,199)(62,146)
Interest and other income12,306 22,323 26,683 
Interest expense(90,774)(56,283)(45,641)
Equity in earnings of unconsolidated real estate entities232,093 80,497 69,547 
Foreign currency exchange gain (loss)111,787 (97,953)7,829 
Gain on sale of real estate13,683 1,493 341 
     Net income$1,959,639 $1,361,227 $1,525,651 
v3.22.0.1
Description of the Business (Narrative) (Details)
ft² in Thousands
Dec. 31, 2021
ft²
country
storageFacility
state
Dec. 31, 2020
Nature Of Business [Line Items]    
Net rentable area (in square feet) 198,319  
Shurgard    
Nature Of Business [Line Items]    
Net rentable area (in square feet) 14,000  
Ownership interest (percentage) 35.00% 35.00%
Number of facilities owned by Shurgard | storageFacility 253  
Number of countries in which entity operates | country 7  
PSB    
Nature Of Business [Line Items]    
Net rentable area (in square feet) 28,000  
Number of states with facilities | state 6  
Ownership interest (percentage) 41.00% 42.00%
Public Storage    
Nature Of Business [Line Items]    
PSA number of self-storage facilities | storageFacility 2,787  
Net rentable area (in square feet) 198,300  
Number of states with facilities | state 39  
Public Storage | Commercial and Retail Space    
Nature Of Business [Line Items]    
Net rentable area (in square feet) 800  
v3.22.0.1
Basis of Presentation and Summary of Significant Accounting Policies (Real Estate Facilities) (Narrative) (Details)
12 Months Ended
Dec. 31, 2021
Summary Of Significant Accounting Policies [Line Items]  
Percentage of interest in real estate sold at fair value 100.00%
Minimum  
Summary Of Significant Accounting Policies [Line Items]  
Estimated useful lives of buildings and improvements (in years) 5 years
Maximum  
Summary Of Significant Accounting Policies [Line Items]  
Estimated useful lives of buildings and improvements (in years) 25 years
v3.22.0.1
Basis of Presentation and Summary of Significant Accounting Policies (Evaluation Of Asset Impairment) (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]      
Impairments $ 0 $ 0 $ 0
v3.22.0.1
Basis of Presentation and Summary of Significant Accounting Policies (Foreign Currency Exchange Translation) (Narrative) (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Trading Activity, Gains and Losses, Net [Line Items]      
Exchange rate translation (percentage) 1.134 1.226  
Weighted Average      
Trading Activity, Gains and Losses, Net [Line Items]      
Exchange rate 1.183 1.141 1.120
v3.22.0.1
Basis of Presentation and Summary of Significant Accounting Policies (Income Taxes) (Narrative) (Details)
Dec. 31, 2021
USD ($)
Accounting Policies [Abstract]  
Unrecognized tax benefits $ 0
v3.22.0.1
Real Estate Facilities (Schedule Of Real Estate Activities) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating facilities, at cost:      
Beginning balance (Operating facilities, at cost) $ 17,372,627 $ 16,289,146 $ 15,296,844
Capital expenditures to maintain real estate facilities 284,200 163,834 192,539
Acquisitions 4,940,413 781,219 421,097
Dispositions (7,408) (303) (426)
Developed or expanded facilities opened for operation 218,001 138,731 379,092
Ending balance (Operating facilities, at cost) 22,807,833 17,372,627 16,289,146
Accumulated depreciation:      
Beginning balance (Accumulated depreciation) (7,152,135) (6,623,475) (6,140,072)
Depreciation expense (625,968) (528,660) (483,408)
Dispositions 4,795 0 5
Ending balance (Accumulated depreciation) (7,773,308) (7,152,135) (6,623,475)
Construction in process:      
Beginning balance (Construction in process) 188,079 141,934 285,339
Costs incurred to develop and expand real estate facilities 302,393 188,102 235,687
Write-off of cancelled projects 0 (3,226) 0
Developed or expanded facilities opened for operation (218,001) (138,731) (379,092)
Ending balance (Construction in process) 272,471 188,079 141,934
Total real estate facilities $ 15,306,996 $ 10,408,571 $ 9,807,605
v3.22.0.1
Real Estate Facilities (Narrative) (Details)
ft² in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
ft²
storageFacility
Dec. 31, 2020
USD ($)
ft²
storageFacility
Dec. 31, 2019
USD ($)
ft²
storageFacility
commercialFacility
Schedule Of Real Estate Facilities [Line Items]      
Payments to acquire real estate $ 5,047,106 $ 792,266 $ 437,758
Proceeds from sale of real estate investments 16,296 1,796 762
Gain on sale of real estate 13,683 1,493 341
Write-off of cancelled projects 0 $ 3,226 $ 0
Adjusted basis of real estate 15,800,000    
Disposal of Real Estate Facilities      
Schedule Of Real Estate Facilities [Line Items]      
Gain on sale of real estate $ 13,700    
Acquisition of Self-Storage Facilities Other Investments      
Schedule Of Real Estate Facilities [Line Items]      
Number of operating self-storage facilities | storageFacility 232 62 44
Net rentable area acquired | ft² 21,830 5,100 3,100
Total cost of acquisition $ 5,100,000 $ 792,300 $ 439,600
Payments to acquire real estate 5,000,000   437,800
Issuance of partnership units 68,200    
Payments to acquire intangible assets 174,900 14,900 18,500
Liabilities assumed   3,800  
Mortgage debt assumed     1,800
Newly Developed and Expansion Projects | Completed Developed and Expansion Project      
Schedule Of Real Estate Facilities [Line Items]      
Aggregate costs to develop and expand $ 218,000 $ 138,700 $ 379,100
Addtional net rentable square feet | ft² 1,600 1,100 3,700
Acquisition of Commercial Facility      
Schedule Of Real Estate Facilities [Line Items]      
Number of operating self-storage facilities | commercialFacility     1
Net rentable area acquired | ft²     46
v3.22.0.1
Investments in Unconsolidated Real Estate Entities (Schedule Of Investments In Real Estate Entities And Equity In Earnings Of Real Estate Entities) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]      
Investments in Unconsolidated Real Estate Entities at December 31, $ 828,763 $ 773,046  
Equity in Earnings of Unconsolidated Real Estate for the Year Ended December 31, 232,093 80,497 $ 69,547
PSB      
Schedule of Equity Method Investments [Line Items]      
Investments in Unconsolidated Real Estate Entities at December 31, 515,312 431,963  
Equity in Earnings of Unconsolidated Real Estate for the Year Ended December 31, 207,722 64,835 54,090
Shurgard      
Schedule of Equity Method Investments [Line Items]      
Investments in Unconsolidated Real Estate Entities at December 31, 313,451 341,083  
Equity in Earnings of Unconsolidated Real Estate for the Year Ended December 31, $ 24,371 $ 15,662 $ 15,457
v3.22.0.1
Investments in Unconsolidated Real Estate Entities (Summarized Financial Information of Equity Method Investments) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]        
Revenues $ 3,415,824 $ 2,915,068 $ 2,855,108  
Costs of operations 1,826,054 1,560,201 1,433,857  
Gain on sale of real estate 13,683 1,493 341  
Net income 1,959,639 1,361,227 1,525,651  
Real estate assets 15,306,996 10,408,571 9,807,605  
Other assets 207,656 172,715    
Total assets 17,380,908 11,816,546    
Noncontrolling interests 20,112 18,032    
Shareholders' equity 9,355,289 8,576,899 9,079,667 $ 9,144,728
Total liabilities, redeemable noncontrolling interests and equity 17,380,908 11,816,546    
PSB and Shurgard        
Schedule of Equity Method Investments [Line Items]        
Revenues 790,461 721,393 713,867  
Costs of operations 263,398 242,992 237,586  
Operating income 333,624 290,901 288,179  
Gain on sale of real estate 359,904 27,234 16,641  
Net income 639,062 275,680 $ 268,054  
Real estate assets 3,437,115 3,353,862    
Other assets 481,403 374,615    
Total assets 3,918,518 3,728,477    
Debt 943,276 742,390    
Other liabilities 298,787 274,950    
Noncontrolling interests 262,243 221,630    
Shareholders' equity 2,414,212 2,489,507    
Total liabilities, redeemable noncontrolling interests and equity $ 3,918,518 $ 3,728,477    
v3.22.0.1
Investments in Unconsolidated Real Estate Entities (Investment in PSB) (Narrative) (Details) - PSB - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]      
Common stock owned of PSB (in shares) 7,158,354 7,158,354  
Limited partnership units in PSB (in shares) 7,305,355 7,305,355  
Ownership interest (percentage) 41.00% 42.00%  
Limited partnership units option to convert to common stock, conversion basis (in shares) 1    
Closing price per share (in USD per share) $ 184.17    
Market value $ 2,700.0    
Cash distribution received $ 127.3 $ 60.7 $ 60.7
v3.22.0.1
Investments in Unconsolidated Real Estate Entities (Investment In Shurgard) (Narrative) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
Dec. 31, 2021
€ / shares
Schedule of Equity Method Investments [Line Items]        
Exchange rate translation (percentage) 1.134 1.226    
Shurgard        
Schedule of Equity Method Investments [Line Items]        
Shares owned (in shares) | shares 31,268,459 31,268,459    
Ownership interest (percentage) 35.00% 35.00%    
Closing price per share (in Euros per share) | € / shares       € 57.50
Market value $ 2,000.0      
Intra-entity profits eliminated 41.5 $ 34.9 $ 23.1  
Basis differential 74.7 83.1    
Amortization of basis differential 8.4 5.8 5.5  
Trademark License | Shurgard        
Schedule of Equity Method Investments [Line Items]        
Intra-entity profits eliminated $ 1.2 $ 1.1 $ 1.0  
v3.22.0.1
Goodwill and Other Intangible Assets (Schedule of Finite-Lived Intangible Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]    
Goodwill, gross $ 165,843 $ 165,843
Goodwill, net 165,843 165,843
Indefinite-lived Intangible Assets [Line Items]    
Gross Book Value 198,180 47,321
Accumulated Amortization (79,953) (27,334)
Total 118,227 19,987
Gross Book Value 382,847 231,988
Net Book Value 302,894 204,654
Trade Names    
Indefinite-lived Intangible Assets [Line Items]    
Indefinite-lived intangible assets $ 18,824 $ 18,824
v3.22.0.1
Goodwill and Other Intangible Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization expense $ 76.6 $ 16.1 $ 16.8
Increase in finite-lived intangible assets $ 174.9 $ 14.9 $ 18.5
Finite-lived intangible assets, weighted average useful life 1 year 1 month 6 days    
v3.22.0.1
Goodwill and Other Intangible Assets (Schedule of Finite-Lived Intangible Assets, Future Amortization Expense) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]    
Estimated future amortization expense, 2022 $ 86,759  
Estimated future amortization expense, 2023 24,417  
Estimated future amortization expense, thereafter 7,051  
Total $ 118,227 $ 19,987
v3.22.0.1
Credit Facility (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Feb. 22, 2022
Dec. 31, 2020
Credit Facility        
Schedule Of Debt [Line Items]        
Credit Facility borrowing capacity $ 500,000,000 $ 500,000,000    
Interest rate spread 0.75%      
Facility fee percentage 0.10%      
Outstanding borrowings $ 0 0    
Standby Letters of Credit        
Schedule Of Debt [Line Items]        
Undrawn standby letters of credit $ 21,200,000 $ 21,200,000   $ 24,300,000
Minimum | Credit Facility        
Schedule Of Debt [Line Items]        
Interest rate spread   0.70%    
Facility fee percentage   0.07%    
Maximum | Credit Facility        
Schedule Of Debt [Line Items]        
Interest rate spread   1.35%    
Facility fee percentage   0.25%    
Subsequent Event | Credit Facility        
Schedule Of Debt [Line Items]        
Outstanding borrowings     $ 0  
v3.22.0.1
Notes Payable (Notes Payable) (Details)
$ in Thousands
Dec. 31, 2021
USD ($)
company
Apr. 23, 2021
Nov. 09, 2021
Jan. 19, 2021
Dec. 31, 2020
USD ($)
Apr. 12, 2019
Debt Instrument [Line Items]            
Principal $ 7,522,405          
Unamortized Costs (47,126)          
Book Value 7,475,279       $ 2,544,992  
Fair Value 7,589,932       2,767,176  
U.S. Dollar Denominated Unsecured Debt            
Debt Instrument [Line Items]            
Principal 5,750,000          
Unamortized Costs (32,002)          
Book Value 5,717,998       1,492,994  
Fair Value $ 5,831,539       1,653,085  
U.S. Dollar Denominated Unsecured Debt | Notes due September 15, 2022            
Debt Instrument [Line Items]            
Coupon Rate 2.37%          
Effective Rate 2.483%          
Principal $ 500,000          
Unamortized Costs (363)          
Book Value 499,637       499,109  
Fair Value $ 506,362       517,419  
U.S. Dollar Denominated Unsecured Debt | Notes due April 23, 2024            
Debt Instrument [Line Items]            
Effective Rate 0.617%          
Principal $ 700,000          
Unamortized Costs (1,628)          
Book Value 698,372          
Fair Value $ 700,314          
U.S. Dollar Denominated Unsecured Debt | Notes due February 15, 2026            
Debt Instrument [Line Items]            
Coupon Rate 0.875%     0.875%    
Effective Rate 1.03%          
Principal $ 500,000          
Unamortized Costs (3,061)          
Book Value 496,939          
Fair Value $ 488,141          
U.S. Dollar Denominated Unsecured Debt | Notes due November 9, 2026            
Debt Instrument [Line Items]            
Coupon Rate 1.50%   1.50%      
Effective Rate 1.64%          
Principal $ 650,000          
Unamortized Costs (4,227)          
Book Value 645,773          
Fair Value $ 649,996          
U.S. Dollar Denominated Unsecured Debt | Notes due September 15, 2027            
Debt Instrument [Line Items]            
Coupon Rate 3.094%          
Effective Rate 3.218%          
Principal $ 500,000          
Unamortized Costs (3,020)          
Book Value 496,980       496,452  
Fair Value $ 535,206       560,833  
U.S. Dollar Denominated Unsecured Debt | Notes due May 1, 2028            
Debt Instrument [Line Items]            
Coupon Rate 1.85% 1.85%        
Effective Rate 1.962%          
Principal $ 650,000          
Unamortized Costs (4,276)          
Book Value 645,724          
Fair Value $ 649,221          
U.S. Dollar Denominated Unsecured Debt | Notes due November 9, 2028            
Debt Instrument [Line Items]            
Coupon Rate 1.95%   1.95%      
Effective Rate 2.044%          
Principal $ 550,000          
Unamortized Costs (3,299)          
Book Value 546,701          
Fair Value $ 548,241          
U.S. Dollar Denominated Unsecured Debt | Notes due May 1, 2029            
Debt Instrument [Line Items]            
Coupon Rate 3.385%         3.385%
Effective Rate 3.459%          
Principal $ 500,000          
Unamortized Costs (2,257)          
Book Value 497,743       497,433  
Fair Value $ 545,580       574,833  
U.S. Dollar Denominated Unsecured Debt | Notes due May 1, 2031            
Debt Instrument [Line Items]            
Coupon Rate 2.30% 2.30%        
Effective Rate 2.419%          
Principal $ 650,000          
Unamortized Costs (6,383)          
Book Value 643,617          
Fair Value $ 656,546          
U.S. Dollar Denominated Unsecured Debt | Notes due November 9, 2031            
Debt Instrument [Line Items]            
Coupon Rate 2.25%   2.25%      
Effective Rate 2.322%          
Principal $ 550,000          
Unamortized Costs (3,488)          
Book Value 546,512          
Fair Value 551,932          
Euro Denominated Unsecured Debt            
Debt Instrument [Line Items]            
Principal 1,749,121          
Unamortized Costs (15,124)          
Book Value 1,733,997       1,026,768  
Fair Value $ 1,734,185       1,087,133  
Euro Denominated Unsecured Debt | Notes due April 12, 2024            
Debt Instrument [Line Items]            
Coupon Rate 1.54%          
Effective Rate 1.54%          
Principal $ 113,431          
Unamortized Costs 0          
Book Value 113,431       122,646  
Fair Value $ 117,526       129,192  
Euro Denominated Unsecured Debt | Notes due November 3, 2025            
Debt Instrument [Line Items]            
Coupon Rate 2.175%          
Effective Rate 2.175%          
Principal $ 274,518          
Unamortized Costs 0          
Book Value 274,518       296,821  
Fair Value $ 295,256       323,552  
Euro Denominated Unsecured Debt | Notes due September 9, 2030            
Debt Instrument [Line Items]            
Coupon Rate 0.50%          
Effective Rate 0.64%          
Principal $ 794,017          
Unamortized Costs (9,730)          
Book Value 784,287          
Fair Value $ 769,561          
Euro Denominated Unsecured Debt | Notes due January 24, 2032            
Debt Instrument [Line Items]            
Coupon Rate 0.875%          
Effective Rate 0.978%          
Principal $ 567,155          
Unamortized Costs (5,394)          
Book Value 561,761       607,301  
Fair Value $ 551,842       634,389  
Mortgage Debt            
Debt Instrument [Line Items]            
Number of real estate facilities securing debt | company 11          
Net book value of real estate facilities securing notes payable $ 66,100          
Coupon Rate 3.878%          
Effective Rate 3.897%          
Principal $ 23,284          
Unamortized Costs 0          
Book Value 23,284       25,230  
Fair Value $ 24,208       $ 26,958  
SOFR | U.S. Dollar Denominated Unsecured Debt | Notes due April 23, 2024            
Debt Instrument [Line Items]            
Interest rate spread 0.47% 0.47%        
v3.22.0.1
Notes Payable (Narrative) (Details)
12 Months Ended
Dec. 31, 2021
tranche
Sep. 09, 2021
USD ($)
Apr. 23, 2021
USD ($)
Jan. 24, 2020
USD ($)
Apr. 12, 2016
USD ($)
Nov. 03, 2015
USD ($)
Dec. 31, 2021
USD ($)
tranche
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Nov. 09, 2021
USD ($)
Sep. 09, 2021
EUR (€)
Jan. 19, 2021
USD ($)
Jan. 24, 2020
EUR (€)
Apr. 12, 2019
USD ($)
Apr. 12, 2016
EUR (€)
Nov. 03, 2015
EUR (€)
Debt Instrument [Line Items]                                
Proceeds from Issuance of Unsecured Debt             $ 5,038,904,000 $ 545,151,000 $ 496,900,000              
Foreign currency exchange gain (loss)             111,787,000 (97,953,000) 7,829,000              
Cash paid for interest expense             77,700,000 52,700,000 48,300,000              
Interest capitalized as real estate             $ 3,500,000 $ 3,400,000 $ 3,900,000              
Mortgage Debt                                
Debt Instrument [Line Items]                                
Interest rate                 3.90%              
Mortgage debt assumed                 $ 1,800,000              
Mortgage Debt | Minimum                                
Debt Instrument [Line Items]                                
Interest rate 3.20%           3.20%                  
Mortgage Debt | Maximum                                
Debt Instrument [Line Items]                                
Interest rate 7.10%           7.10%                  
U.S. Dollar Denominated Unsecured Debt                                
Debt Instrument [Line Items]                                
Debt to Total Assets ratio 16.00%           16.00%                  
Adjusted EBTIDA to interest Expense ratio             30                  
U.S. Dollar Denominated Unsecured Debt | Minimum                                
Debt Instrument [Line Items]                                
Adjusted EBTIDA to interest Expense ratio             1.5                  
U.S. Dollar Denominated Unsecured Debt | Notes due February 15, 2026                                
Debt Instrument [Line Items]                                
Debt issuance amount                       $ 500,000,000        
Interest rate 0.875%           0.875%         0.875%        
Debt issuance costs                       $ 3,800,000        
U.S. Dollar Denominated Unsecured Debt | Notes due April 23, 2024, May 1, 2028 and May 1, 2031                                
Debt Instrument [Line Items]                                
Debt issuance costs     $ 13,700,000                          
U.S. Dollar Denominated Unsecured Debt | Notes due April 23, 2024                                
Debt Instrument [Line Items]                                
Debt issuance amount     700,000,000                          
Reset quarterly rate 0.52%           0.52%                  
U.S. Dollar Denominated Unsecured Debt | Notes due May 1, 2028                                
Debt Instrument [Line Items]                                
Debt issuance amount     $ 650,000,000                          
Interest rate 1.85%   1.85%       1.85%                  
U.S. Dollar Denominated Unsecured Debt | Notes due May 1, 2031                                
Debt Instrument [Line Items]                                
Debt issuance amount     $ 650,000,000                          
Interest rate 2.30%   2.30%       2.30%                  
U.S. Dollar Denominated Unsecured Debt | Notes Due November 9, 2026, November 9, 2028 and November 9, 2031                                
Debt Instrument [Line Items]                                
Debt issuance costs                   $ 11,300,000            
U.S. Dollar Denominated Unsecured Debt | Notes due November 9, 2026                                
Debt Instrument [Line Items]                                
Debt issuance amount                   $ 650,000,000            
Interest rate 1.50%           1.50%     1.50%            
U.S. Dollar Denominated Unsecured Debt | Notes due November 9, 2028                                
Debt Instrument [Line Items]                                
Debt issuance amount                   $ 550,000,000            
Interest rate 1.95%           1.95%     1.95%            
U.S. Dollar Denominated Unsecured Debt | Notes due November 9, 2031                                
Debt Instrument [Line Items]                                
Debt issuance amount                   $ 550,000,000            
Interest rate 2.25%           2.25%     2.25%            
U.S. Dollar Denominated Unsecured Debt | Maximum Covenant                                
Debt Instrument [Line Items]                                
Debt to Total Assets ratio 65.00%           65.00%                  
U.S. Dollar Denominated Unsecured Debt | Notes due May 1, 2029                                
Debt Instrument [Line Items]                                
Debt issuance amount                           $ 500,000,000    
Interest rate 3.385%           3.385%             3.385%    
Debt issuance costs                           $ 3,100,000    
Euro Denominated Unsecured Debt                                
Debt Instrument [Line Items]                                
Number of tranches | tranche 4           4                  
Euro Denominated Unsecured Debt | Notes due November 3, 2025                                
Debt Instrument [Line Items]                                
Debt issuance amount | €                               € 242,000,000
Interest rate 2.175%           2.175%                  
Proceeds from Issuance of Unsecured Debt           $ 264,300,000                    
Euro Denominated Unsecured Debt | Notes due April 12, 2024                                
Debt Instrument [Line Items]                                
Debt issuance amount | €                             € 100,000,000  
Interest rate 1.54%           1.54%                  
Proceeds from Issuance of Unsecured Debt         $ 113,600,000                      
Euro Denominated Unsecured Debt | Notes due January 24, 2032                                
Debt Instrument [Line Items]                                
Debt issuance amount | €                         € 500,000,000      
Interest rate 0.875%           0.875%                  
Proceeds from Issuance of Unsecured Debt       $ 545,200,000                        
Euro Denominated Unsecured Debt | Notes due September 9, 2030                                
Debt Instrument [Line Items]                                
Debt issuance amount | €                     € 700,000,000          
Interest rate 0.50%           0.50%                  
Proceeds from Issuance of Unsecured Debt   $ 817,600,000                            
SOFR | U.S. Dollar Denominated Unsecured Debt | Notes due April 23, 2024                                
Debt Instrument [Line Items]                                
Interest rate spread 0.47%   0.47%                          
v3.22.0.1
Notes Payable (Maturities Of Notes Payable) (Details)
$ in Thousands
Dec. 31, 2021
USD ($)
Debt Instrument [Line Items]  
Total debt $ 7,522,405
Unsecured Debt  
Debt Instrument [Line Items]  
2022 500,000
2023 0
2024 813,431
2025 274,518
2026 1,150,000
Thereafter 4,761,172
Total debt $ 7,499,121
Weighted average effective rate 1.80%
Mortgage Debt  
Debt Instrument [Line Items]  
2022 $ 2,483
2023 19,219
2024 124
2025 131
2026 138
Thereafter 1,189
Total debt $ 23,284
Weighted average effective rate 3.90%
Total  
Debt Instrument [Line Items]  
2022 $ 502,483
2023 19,219
2024 813,555
2025 274,649
2026 1,150,138
Thereafter 4,762,361
Total debt $ 7,522,405
Weighted average effective rate 1.80%
v3.22.0.1
Noncontrolling Interests (Narrative) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
shares
Acquisition of Self-Storage Facilities Other Investments  
Noncontrolling Interest [Line Items]  
Issuance of partnership units | $ $ 68.2
Noncontrolling Interests  
Noncontrolling Interest [Line Items]  
Convertible partnership units (in shares) 443,970
Partnership units conversion ratio 1
Noncontrolling Interests | Acquisition of Self-Storage Facilities Other Investments  
Noncontrolling Interest [Line Items]  
Convertible partnership units (in shares) 211,992
v3.22.0.1
Shareholders' Equity (Preferred Shares Outstanding) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Class of Stock [Line Items]    
Preferred stock, shares outstanding (in shares) 164,000 151,700
Liquidation Preference $ 4,100,000 $ 3,792,500
Series C Preferred Stock    
Class of Stock [Line Items]    
Earliest Redemption Date May 17, 2021  
Dividend Rate 5.125%  
Preferred stock, shares outstanding (in shares) 0 8,000
Liquidation Preference $ 0 $ 200,000
Series D Preferred Stock    
Class of Stock [Line Items]    
Earliest Redemption Date Jul. 20, 2021  
Dividend Rate 4.95%  
Preferred stock, shares outstanding (in shares) 0 13,000
Liquidation Preference $ 0 $ 325,000
Series E Preferred Stock    
Class of Stock [Line Items]    
Earliest Redemption Date Oct. 14, 2021  
Dividend Rate 4.90%  
Preferred stock, shares outstanding (in shares) 0 14,000
Liquidation Preference $ 0 $ 350,000
Series F Preferred Stock    
Class of Stock [Line Items]    
Earliest Redemption Date Jun. 02, 2022  
Dividend Rate 5.15%  
Preferred stock, shares outstanding (in shares) 11,200 11,200
Liquidation Preference $ 280,000 $ 280,000
Series G Preferred Stock    
Class of Stock [Line Items]    
Earliest Redemption Date Aug. 09, 2022  
Dividend Rate 5.05%  
Preferred stock, shares outstanding (in shares) 12,000 12,000
Liquidation Preference $ 300,000 $ 300,000
Series H Preferred Stock    
Class of Stock [Line Items]    
Earliest Redemption Date Mar. 11, 2024  
Dividend Rate 5.60%  
Preferred stock, shares outstanding (in shares) 11,400 11,400
Liquidation Preference $ 285,000 $ 285,000
Series I Preferred Stock    
Class of Stock [Line Items]    
Earliest Redemption Date Sep. 12, 2024  
Dividend Rate 4.875%  
Preferred stock, shares outstanding (in shares) 12,650 12,650
Liquidation Preference $ 316,250 $ 316,250
Series J Preferred Stock    
Class of Stock [Line Items]    
Earliest Redemption Date Nov. 15, 2024  
Dividend Rate 4.70%  
Preferred stock, shares outstanding (in shares) 10,350 10,350
Liquidation Preference $ 258,750 $ 258,750
Series K Preferred Stock    
Class of Stock [Line Items]    
Earliest Redemption Date Dec. 20, 2024  
Dividend Rate 4.75%  
Preferred stock, shares outstanding (in shares) 9,200 9,200
Liquidation Preference $ 230,000 $ 230,000
Series L Preferred Stock    
Class of Stock [Line Items]    
Earliest Redemption Date Jun. 17, 2025  
Dividend Rate 4.625%  
Preferred stock, shares outstanding (in shares) 22,600 22,600
Liquidation Preference $ 565,000 $ 565,000
Series M Preferred Stock    
Class of Stock [Line Items]    
Earliest Redemption Date Aug. 14, 2025  
Dividend Rate 4.125%  
Preferred stock, shares outstanding (in shares) 9,200 9,200
Liquidation Preference $ 230,000 $ 230,000
Series N Preferred Stock    
Class of Stock [Line Items]    
Earliest Redemption Date Oct. 06, 2025  
Dividend Rate 3.875%  
Preferred stock, shares outstanding (in shares) 11,300 11,300
Liquidation Preference $ 282,500 $ 282,500
Series O Preferred Stock    
Class of Stock [Line Items]    
Earliest Redemption Date Nov. 17, 2025  
Dividend Rate 3.90%  
Preferred stock, shares outstanding (in shares) 6,800 6,800
Liquidation Preference $ 170,000 $ 170,000
Series P Preferred Stock    
Class of Stock [Line Items]    
Earliest Redemption Date Jun. 16, 2026  
Dividend Rate 4.00%  
Preferred stock, shares outstanding (in shares) 24,150  
Liquidation Preference $ 603,750  
Series Q Preferred Stock    
Class of Stock [Line Items]    
Earliest Redemption Date Aug. 17, 2026  
Dividend Rate 3.95%  
Preferred stock, shares outstanding (in shares) 5,750  
Liquidation Preference $ 143,750  
Series R Preferred Stock    
Class of Stock [Line Items]    
Earliest Redemption Date Nov. 19, 2026  
Dividend Rate 4.00%  
Preferred stock, shares outstanding (in shares) 17,400  
Liquidation Preference $ 435,000  
v3.22.0.1
Shareholders' Equity (Preferred Shares) (Narrative) (Details)
12 Months Ended
Dec. 31, 2021
USD ($)
boardMember
dividend
$ / shares
Stockholders' Equity Note [Abstract]  
Number of quarterly dividends in arrearage before preferred shareholders can elect additional board members | dividend 6
Number of additional board members the preferred shareholders can elect in the case of an excess arrearage of quarterly dividends | boardMember 2
Amount of preferred dividends in arrears | $ $ 0
Affirmative vote of outstanding shares of a series of Preferred Shares required for any material and adverse amendment to the terms of series, percent 66.67%
Affirmative vote of outstanding shares of all Preferred Shares, voting as a single class, required to issue shares ranking senior to Preferred Shares, percent 66.67%
Redemption price per share (in USD per share) | $ / shares $ 25.00
v3.22.0.1
Shareholders' Equity (Schedule of Issuance and Repurchases of Common Shares) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Class of Stock [Line Items]      
Issuance price per share (in USD per share) $ 25.00 $ 25.00 $ 25.00
Preferred shares per depositary share (in shares) 0.001 0.001 0.001
Gross Proceeds $ 1,147,455 $ 1,208,206 $ 1,059,156
Allocation of Income to Preferred Shares Holders in Connection with Redemption $ 28,914 $ 48,265 $ 32,693
P, Q and R      
Class of Stock [Line Items]      
Shares issued (in shares) 47,300    
Gross Proceeds $ 1,182,500    
Issuance Costs 35,045    
L, M, N and O      
Class of Stock [Line Items]      
Shares issued (in shares)   49,900  
Gross Proceeds   $ 1,247,500  
Issuance Costs   39,294  
H, I, J and K      
Class of Stock [Line Items]      
Shares issued (in shares)     43,600
Gross Proceeds     $ 1,090,000
Issuance Costs     30,844
C, D and E      
Class of Stock [Line Items]      
Aggregate Redemption Amount 875,000    
Allocation of Income to Preferred Shares Holders in Connection with Redemption $ 28,914    
V, W, X and B      
Class of Stock [Line Items]      
Aggregate Redemption Amount   1,520,000  
Allocation of Income to Preferred Shares Holders in Connection with Redemption   $ 48,265  
Y, Z, U and A      
Class of Stock [Line Items]      
Aggregate Redemption Amount     1,050,000
Allocation of Income to Preferred Shares Holders in Connection with Redemption     $ 32,693
v3.22.0.1
Shareholders' Equity (Activity of Issuance of Common Shares) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Equity [Abstract]      
Employee stock-based compensation and exercise of stock options (in shares) 552,713 163,127 287,734
Employee stock-based compensation and exercise of stock options $ 95,860 $ 12,664 $ 33,564
v3.22.0.1
Shareholders' Equity (Common Shares) (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Equity [Abstract]      
Number of shares authorized for repurchase (in shares) 35.0    
Number of shares repurchased to date 23.7    
Shares repurchased pursuant to authorization (in shares) 0.0 0.0 0.0
Common stock dividends paid in aggregate $ 1,402,000 $ 1,399,000 $ 1,399,000
Distributions to common shareholders and restricted share unitholders (in USD per share) $ 8.00 $ 8.00 $ 8.00
Preferred share dividends $ 186,579 $ 207,068 $ 210,179
v3.22.0.1
Shareholders' Equity (Schedule Of Distribution Classification) (Details)
3 Months Ended
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Equity [Abstract]        
Ordinary Dividends 94.57% 94.55% 94.54% 94.55%
Capital Gain Distributions 5.43% 5.45% 5.46% 5.45%
Total 100.00% 100.00% 100.00% 100.00%
v3.22.0.1
Related Party Transactions (Narrative) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
storageFacility
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Related Party Transaction [Line Items]      
Tenants reinsurance premiums earned by subsidiaries | $ $ 2.1 $ 1.6 $ 1.5
Canada | Hughes Owned Canadian Facilities      
Related Party Transaction [Line Items]      
Number of self-storage facilities | storageFacility 65    
Ownership interest 0.00%    
v3.22.0.1
Share-Based Compensation (Narrative) (Details) - 2021 Equity and Performance-Based Incentive Compensation Plan - shares
Dec. 31, 2021
Apr. 26, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares authorized (in shares)   3,000,000,000,000
Number of shares available for grant (in shares) 2,252,321  
v3.22.0.1
Share-Based Compensation (Share-Based Compensation Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]      
Share-based compensation cost capitalized $ 3,900    
Share-based Payment Arrangement, Expensed, Amount [Line Items]      
Share-based compensation expense 59,865 $ 33,490 $ 25,961
Self-storage cost of operations      
Share-based Payment Arrangement, Expensed, Amount [Line Items]      
Share-based compensation expense 20,544 14,904 12,090
Ancillary cost of operations      
Share-based Payment Arrangement, Expensed, Amount [Line Items]      
Share-based compensation expense 1,561 0 0
General and administrative      
Share-based Payment Arrangement, Expensed, Amount [Line Items]      
Share-based compensation expense $ 37,760 $ 18,586 $ 13,871
v3.22.0.1
Share-Based Compensation (Stock Options) (Narrative) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
boardMember
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of common shares in connection with share-based compensation | $ $ 95,860 $ 12,664 $ 33,564
Issuance of common shares in connection with share-based compensation (in shares) | shares 552,713 163,127 287,734
Stock options granted (in shares) | shares 560,000 840,000 120,000
Compensation cost not yet recognized | $ $ 23,300    
Average remaining contractual lives (in years) 4 years    
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expiration period (in years) 10 years    
Share-based compensation expense | $ $ 25,100 $ 7,600 $ 5,000
Accelerated compensation expense | $ 4,500 300 $ 0
Stock options outstanding, aggregate intrinsic value | $ $ 481,900    
Average remaining contractual lives (in years) 6 years    
Compensation recognition period (in years) 3 years    
Aggregate intrinsic value for stock options exercisable | $ $ 251,300    
Stock Options | Board Members      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of common shares in connection with share-based compensation | $ $ 1,500    
Number of board members who received award | boardMember 5    
Stock Options | Board Member 1      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of common shares in connection with share-based compensation (in shares) | shares 15,000    
Stock Options | Board Member 2      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of common shares in connection with share-based compensation (in shares) | shares 15,000    
Stock Options | Board Member 3      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of common shares in connection with share-based compensation (in shares) | shares 15,000    
Stock Options | Board Member 4      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of common shares in connection with share-based compensation (in shares) | shares 15,000    
Stock Options | Board Member 5      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of common shares in connection with share-based compensation (in shares) | shares 15,000    
Performance Target, Stock Options | Dependent upon Meeting Certain Performance Targets with Respect to 2021, 2022, and 2023      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense | $ $ 8,100    
Stock options granted (in shares) | shares 245,000    
Performance target (percentage) 100.00%    
Performance Target, Stock Options | Dependent upon Meeting Certain Performance Targets with Respect to 2020, 2021, and 2022      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense | $ $ 10,900 $ 3,000  
Stock options granted (in shares) | shares   770,000  
Performance target (percentage) 125.00% 100.00%  
Minimum | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period (in years) 3 years    
Maximum | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period (in years) 5 years    
v3.22.0.1
Share-Based Compensation (Share-Based Compensation Options Outstanding Rollforward) (Details) - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Number of Options      
Number of options outstanding, beginning balance (in shares) 2,961,167 2,339,667 2,420,922
Granted (in shares) 560,000 840,000 120,000
Exercised (in shares) (471,216) (71,500) (191,255)
Cancelled (in shares) (10,000) (147,000) (10,000)
Number of options outstanding, ending balance (in shares) 3,039,951 2,961,167 2,339,667
Number of options exercisable (in shares) 1,464,411    
Weighted Average Exercise Price per Share      
Number of options outstanding, beginning balance (in USD per share) $ 210.59 $ 204.53 $ 201.31
Number of options outstanding, ending balance (in USD per share) 216.04 $ 210.59 $ 204.53
Number of options exercisable (in USD per share) $ 202.97    
Service-Based Stock Options      
Number of Options      
Number of options outstanding, beginning balance (in shares) 2,231,167 2,339,667 2,420,922
Granted (in shares) 140,000 70,000 120,000
Exercised (in shares) (471,216) (71,500) (191,255)
Cancelled (in shares) 0 (107,000) (10,000)
Number of options outstanding, ending balance (in shares) 1,899,951 2,231,167 2,339,667
Number of options exercisable (in shares) 1,464,411    
Weighted Average Exercise Price per Share      
Number of options outstanding, beginning balance (in USD per share) $ 204.60 $ 204.53 $ 201.31
Number of options outstanding, ending balance (in USD per share) 208.16 $ 204.60 $ 204.53
Number of options exercisable (in USD per share) $ 202.97    
Performance-Based Stock Options      
Number of Options      
Number of options outstanding, beginning balance (in shares) 730,000 0 0
Granted (in shares) 420,000 770,000 0
Exercised (in shares) 0 0 0
Cancelled (in shares) (10,000) (40,000) 0
Number of options outstanding, ending balance (in shares) 1,140,000 730,000 0
Number of options exercisable (in shares) 0    
Weighted Average Exercise Price per Share      
Number of options outstanding, beginning balance (in USD per share) $ 228.94 $ 0 $ 0
Number of options outstanding, ending balance (in USD per share) 229.16 $ 228.94 $ 0
Number of options exercisable (in USD per share) $ 0    
v3.22.0.1
Share-Based Compensation (Share-Based Compensation Valuation Assumptions) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Aggregate exercise date intrinsic value of options exercised during the year $ 44,613 $ 3,433 $ 11,848
Average estimated value of options granted during the year $ 62.66 $ 17.79 $ 9.61
Share-Based Payment Arrangement, Option, Valued With Black-Scholes Method      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected life of options in years, based upon historical experience (in years) 5 years 5 years 5 years
Risk-free interest rate 0.80% 0.40% 2.30%
Expected volatility, based upon historical volatility 24.10% 21.60% 8.90%
Expected dividend yield 2.90% 3.80% 3.60%
Share-Based Payment Arrangement, Option, Valued With Monte-Carlo Simulation Method      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected life of options in years, based upon historical experience (in years) 5 years    
Risk-free interest rate 0.90%    
Expected volatility, based upon historical volatility 26.50%    
Expected dividend yield 2.90%    
v3.22.0.1
Share-Based Compensation (Restricted Share Units) (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Restricted Share Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 38.7 $ 25.9 $ 21.0
Acceleration of amortization on grants 11.4 $ 5.4 $ 0.0
Restricted stock, compensation expense not yet recognized $ 94.1    
Compensation recognition period (in years) 3 years    
Performance Target, Restricted Share Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 6.4    
Grants in period (in shares) 37,000    
Performance target (percentage) 125.00%    
Minimum | Restricted Share Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period (in years) 5 years    
Maximum | Restricted Share Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period (in years) 8 years    
v3.22.0.1
Share-Based Compensation (Share-Based Compensation Restricted Units) (Details) - Restricted Share Units - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Number of Restricted Share Units      
Restricted share units outstanding, beginning balance (in shares) 552,788 619,150 717,696
Granted (in shares) 189,318 110,755 97,140
Vested (in shares) (138,420) (140,089) (160,329)
Forfeited (in shares) (32,864) (37,028) (35,357)
Restricted share units outstanding, ending balance (in shares) 570,822 552,788 619,150
Weighted-Average Grant-Date Fair Value      
Restricted share units outstanding, beginning balance (in USD per share) $ 218.11 $ 213.29 $ 210.69
Granted (in USD per share) 321.17 222.27 217.35
Vested (in USD per share) (216.63) (200.88) (204.04)
Forfeited (in USD per share) (221.32) (215.08) (213.62)
Restricted share units outstanding, ending balance (in USD per share) $ 251.95 $ 218.11 $ 213.29
v3.22.0.1
Share-Based Compensation (Share-Based Compensation Shares Vesting During Year) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Cash paid for taxes upon vesting in lieu of issuing common shares $ 13,069 $ 10,518 $ 12,162
Restricted Share Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair value of vested shares on vesting date 37,430 31,076 33,769
Cash paid for taxes upon vesting in lieu of issuing common shares $ 13,069 $ 10,518 $ 12,162
Common shares issued upon vesting (in shares) 81,325 91,627 96,479
v3.22.0.1
Net Income per Common Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Earnings Per Share [Abstract]      
Numerator for basic and dilutive net income per common share – net income allocable to common shareholders $ 1,732,444 $ 1,098,335 $ 1,272,767
Denominator for basic net income per share - weighted average common shares outstanding 174,858 174,494 174,287
Net effect of dilutive stock options - based on treasury stock method 710 148 243
Denominator for dilutive net income per share - weighted average common shares outstanding 175,568 174,642 174,530
Basic (in USD per share) $ 9.91 $ 6.29 $ 7.30
Diluted (in USD per share) $ 9.87 $ 6.29 $ 7.29
v3.22.0.1
Segment Information (Summary Of Segment Information) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]      
Revenue $ 3,415,824 $ 2,915,068 $ 2,855,108
Cost of operations (852,030) (807,543) (762,416)
Cost of operations (68,568) (59,919) (50,736)
Depreciation and amortization (713,428) (553,257) (512,918)
General and administrative (101,254) (83,199) (62,146)
Interest and other income 12,306 22,323 26,683
Interest expense (90,774) (56,283) (45,641)
Equity in earnings of unconsolidated real estate entities 232,093 80,497 69,547
Foreign currency exchange gain (loss) 111,787 (97,953) 7,829
Gain on sale of real estate 13,683 1,493 341
Net income 1,959,639 1,361,227 1,525,651
Operating Segments      
Segment Reporting Information [Line Items]      
Net income 1,781,798 1,494,349 1,529,038
Segment Reconciling Items      
Segment Reporting Information [Line Items]      
General and administrative (101,254) (83,199) (62,146)
Interest and other income 12,306 22,323 26,683
Interest expense (90,774) (56,283) (45,641)
Equity in earnings of unconsolidated real estate entities 232,093 80,497 69,547
Foreign currency exchange gain (loss) 111,787 (97,953) 7,829
Gain on sale of real estate 13,683 1,493 341
Self-Storage Operations Reportable Segment | Operating Segments      
Segment Reporting Information [Line Items]      
Revenue 3,203,566 2,721,630 2,684,552
Cost of operations (852,030) (807,543) (762,416)
Net operating income 2,351,536 1,914,087 1,922,136
Depreciation and amortization (713,428) (553,257) (512,918)
Net income 1,638,108 1,360,830 1,409,218
Ancillary Operations | Operating Segments      
Segment Reporting Information [Line Items]      
Revenue 212,258 193,438 170,556
Cost of operations (68,568) (59,919) (50,736)
Net operating income $ 143,690 $ 133,519 $ 119,820
v3.22.0.1
Commitments And Contingencies (Narrative) (Details)
certificate in Millions
Dec. 31, 2021
USD ($)
certificate
Commitments and Contingencies Disclosure [Abstract]  
Deductible for general liability $ 2,000,000
Deductible for property 25,000,000
Reduced deductible for property 5,000,000
Aggregate loss threshold for reduced deductible for property 35,000,000
Minimum loss per occurrence to reach aggregate loss threshold for reduced deductible for property 5,000,000
Aggregate limit for property coverage 75,000,000
Aggregate limit for general liability coverage 102,000,000
Tenant insurance program against claims, maximum amount 5,000
Third-party insurance coverage for claims paid exceeding amount for individual event 15,000,000
Third-party limit for insurance coverage claims paid for individual event $ 5,000,000
Number of tenant certificate holders participating in insurance program, approximate | certificate 1.2
Aggregate coverage of tenants participating in insurance program $ 4,900,000,000
Construction commitments 166,800,000
Construction commitments 2022 142,700,000
Construction commitments 2023 22,800,000
Construction commitments 2024 1,300,000
Various lease commitments 66,100,000
Various lease commitments 2022 3,100,000
Various lease commitments 2023 3,000,000
Various lease commitments 2024 3,000,000
Various lease commitments 2025 2,900,000
Various lease commitments 2026 3,000,000
Various lease commitments thereafter $ 51,100,000
v3.22.0.1
Subsequent Events (Narrative) (Details)
$ / shares in Units, ft² in Thousands, $ in Thousands
2 Months Ended 12 Months Ended
Jan. 13, 2022
USD ($)
$ / shares
shares
Feb. 22, 2022
USD ($)
ft²
storageFacility
state
Dec. 31, 2021
USD ($)
ft²
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
$ / shares
shares
Subsequent Event [Line Items]          
Net rentable area (in square feet) | ft²     198,319    
Preferred shares per depositary share (in shares) | shares     0.001 0.001 0.001
Shares issued (in USD per share) | $ / shares     $ 25.00 $ 25.00 $ 25.00
Gross proceeds     $ 4,100,000 $ 3,792,500  
Subsequent Event | Series S Preferred Stock          
Subsequent Event [Line Items]          
Stock issued during period (in shares) | shares 10,000,000        
Preferred shares per depositary share (in shares) | shares 0.001        
Dividend rate percentage 4.10%        
Shares issued (in USD per share) | $ / shares $ 25.00        
Gross proceeds $ 250,000        
Issuance costs $ 7,200        
Acquisition of Self-Storage Facilities Other Investments          
Subsequent Event [Line Items]          
Total cost of acquisition     $ 5,100,000 $ 792,300 $ 439,600
Acquisition of Self-Storage Facilities Other Investments | Subsequent Event          
Subsequent Event [Line Items]          
Number of self-storage facilities acquired or under contract to be acquired | storageFacility   15      
Number of states self-storage facilities acquired or under contracts to be acquired | state   10      
Net rentable area (in square feet) | ft²   1,200      
Total cost of acquisition   $ 212,400      
v3.22.0.1
SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION (Details)
ft² in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
ft²
storageFacility
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 2,787
Net Rentable Square Feet | ft² 198,319
2021 Encum- brances $ 23,284
Initial Cost, Land 5,072,209
Initial Cost, Building & Improvements 14,225,088
Costs Subsequent to Acquisition 3,510,536
Gross Carrying Amount, Land 5,134,060
Gross Carrying Amount, Buildings 17,673,773
Gross Carrying Amount, Total 22,807,833
Accumulated Depreciation 7,773,308
Commercial and non-operating real estate  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
2021 Encum- brances 0
Initial Cost, Land 13,194
Initial Cost, Building & Improvements 26,143
Costs Subsequent to Acquisition 48,112
Gross Carrying Amount, Land 13,346
Gross Carrying Amount, Buildings 74,103
Gross Carrying Amount, Total 87,449
Accumulated Depreciation $ 44,739
Los Angeles | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 228
Net Rentable Square Feet | ft² 16,710
2021 Encum- brances $ 409
Initial Cost, Land 543,650
Initial Cost, Building & Improvements 981,256
Costs Subsequent to Acquisition 448,343
Gross Carrying Amount, Land 542,073
Gross Carrying Amount, Buildings 1,431,176
Gross Carrying Amount, Total 1,973,249
Accumulated Depreciation $ 859,874
Dallas/Ft. Worth | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 189
Net Rentable Square Feet | ft² 17,017
2021 Encum- brances $ 0
Initial Cost, Land 322,316
Initial Cost, Building & Improvements 1,852,445
Costs Subsequent to Acquisition 143,451
Gross Carrying Amount, Land 323,778
Gross Carrying Amount, Buildings 1,994,434
Gross Carrying Amount, Total 2,318,212
Accumulated Depreciation $ 335,716
Houston | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 142
Net Rentable Square Feet | ft² 11,953
2021 Encum- brances $ 0
Initial Cost, Land 220,019
Initial Cost, Building & Improvements 620,942
Costs Subsequent to Acquisition 246,434
Gross Carrying Amount, Land 219,340
Gross Carrying Amount, Buildings 868,055
Gross Carrying Amount, Total 1,087,395
Accumulated Depreciation $ 345,675
San Francisco | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 140
Net Rentable Square Feet | ft² 9,196
2021 Encum- brances $ 0
Initial Cost, Land 245,623
Initial Cost, Building & Improvements 557,398
Costs Subsequent to Acquisition 266,677
Gross Carrying Amount, Land 258,373
Gross Carrying Amount, Buildings 811,325
Gross Carrying Amount, Total 1,069,698
Accumulated Depreciation $ 521,635
Chicago | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 136
Net Rentable Square Feet | ft² 8,756
2021 Encum- brances $ 0
Initial Cost, Land 146,095
Initial Cost, Building & Improvements 428,446
Costs Subsequent to Acquisition 138,390
Gross Carrying Amount, Land 148,932
Gross Carrying Amount, Buildings 563,999
Gross Carrying Amount, Total 712,931
Accumulated Depreciation $ 405,079
Washington DC | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 117
Net Rentable Square Feet | ft² 8,272
2021 Encum- brances $ 0
Initial Cost, Land 418,460
Initial Cost, Building & Improvements 1,308,988
Costs Subsequent to Acquisition 143,417
Gross Carrying Amount, Land 423,614
Gross Carrying Amount, Buildings 1,447,251
Gross Carrying Amount, Total 1,870,865
Accumulated Depreciation $ 373,168
Atlanta | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 111
Net Rentable Square Feet | ft² 7,476
2021 Encum- brances $ 1,653
Initial Cost, Land 142,553
Initial Cost, Building & Improvements 407,272
Costs Subsequent to Acquisition 95,145
Gross Carrying Amount, Land 142,915
Gross Carrying Amount, Buildings 502,055
Gross Carrying Amount, Total 644,970
Accumulated Depreciation $ 298,833
Seattle/Tacoma | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 100
Net Rentable Square Feet | ft² 6,986
2021 Encum- brances $ 0
Initial Cost, Land 211,959
Initial Cost, Building & Improvements 584,089
Costs Subsequent to Acquisition 123,883
Gross Carrying Amount, Land 212,607
Gross Carrying Amount, Buildings 707,324
Gross Carrying Amount, Total 919,931
Accumulated Depreciation $ 379,516
Miami | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 97
Net Rentable Square Feet | ft² 7,223
2021 Encum- brances $ 0
Initial Cost, Land 247,807
Initial Cost, Building & Improvements 536,321
Costs Subsequent to Acquisition 145,494
Gross Carrying Amount, Land 249,700
Gross Carrying Amount, Buildings 679,922
Gross Carrying Amount, Total 929,622
Accumulated Depreciation $ 365,471
New York | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 96
Net Rentable Square Feet | ft² 7,053
2021 Encum- brances $ 0
Initial Cost, Land 277,121
Initial Cost, Building & Improvements 586,592
Costs Subsequent to Acquisition 223,807
Gross Carrying Amount, Land 283,458
Gross Carrying Amount, Buildings 804,062
Gross Carrying Amount, Total 1,087,520
Accumulated Depreciation $ 494,284
Orlando/Daytona | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 72
Net Rentable Square Feet | ft² 4,628
2021 Encum- brances $ 11,274
Initial Cost, Land 140,411
Initial Cost, Building & Improvements 253,375
Costs Subsequent to Acquisition 68,265
Gross Carrying Amount, Land 145,892
Gross Carrying Amount, Buildings 316,159
Gross Carrying Amount, Total 462,051
Accumulated Depreciation $ 179,459
Denver | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 69
Net Rentable Square Feet | ft² 5,197
2021 Encum- brances $ 8,318
Initial Cost, Land 117,109
Initial Cost, Building & Improvements 308,922
Costs Subsequent to Acquisition 102,116
Gross Carrying Amount, Land 117,830
Gross Carrying Amount, Buildings 410,317
Gross Carrying Amount, Total 528,147
Accumulated Depreciation $ 171,779
Minneapolis/St. Paul | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 64
Net Rentable Square Feet | ft² 4,937
2021 Encum- brances $ 1,630
Initial Cost, Land 118,333
Initial Cost, Building & Improvements 292,465
Costs Subsequent to Acquisition 97,660
Gross Carrying Amount, Land 118,498
Gross Carrying Amount, Buildings 389,960
Gross Carrying Amount, Total 508,458
Accumulated Depreciation $ 148,047
Philadelphia | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 62
Net Rentable Square Feet | ft² 4,041
2021 Encum- brances $ 0
Initial Cost, Land 58,824
Initial Cost, Building & Improvements 226,733
Costs Subsequent to Acquisition 62,263
Gross Carrying Amount, Land 57,845
Gross Carrying Amount, Buildings 289,975
Gross Carrying Amount, Total 347,820
Accumulated Depreciation $ 176,981
Charlotte | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 59
Net Rentable Square Feet | ft² 4,604
2021 Encum- brances $ 0
Initial Cost, Land 87,349
Initial Cost, Building & Improvements 231,449
Costs Subsequent to Acquisition 84,331
Gross Carrying Amount, Land 95,212
Gross Carrying Amount, Buildings 307,917
Gross Carrying Amount, Total 403,129
Accumulated Depreciation $ 144,670
Tampa | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 57
Net Rentable Square Feet | ft² 3,969
2021 Encum- brances $ 0
Initial Cost, Land 93,109
Initial Cost, Building & Improvements 213,546
Costs Subsequent to Acquisition 61,429
Gross Carrying Amount, Land 96,422
Gross Carrying Amount, Buildings 271,662
Gross Carrying Amount, Total 368,084
Accumulated Depreciation $ 142,716
Detroit | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 48
Net Rentable Square Feet | ft² 3,443
2021 Encum- brances $ 0
Initial Cost, Land 67,465
Initial Cost, Building & Improvements 225,061
Costs Subsequent to Acquisition 41,894
Gross Carrying Amount, Land 68,315
Gross Carrying Amount, Buildings 266,105
Gross Carrying Amount, Total 334,420
Accumulated Depreciation $ 130,902
Portland | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 48
Net Rentable Square Feet | ft² 2,750
2021 Encum- brances $ 0
Initial Cost, Land 60,108
Initial Cost, Building & Improvements 203,107
Costs Subsequent to Acquisition 31,513
Gross Carrying Amount, Land 60,766
Gross Carrying Amount, Buildings 233,962
Gross Carrying Amount, Total 294,728
Accumulated Depreciation $ 114,418
Baltimore | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 48
Net Rentable Square Feet | ft² 3,624
2021 Encum- brances $ 0
Initial Cost, Land 134,774
Initial Cost, Building & Improvements 749,058
Costs Subsequent to Acquisition 28,468
Gross Carrying Amount, Land 134,898
Gross Carrying Amount, Buildings 777,402
Gross Carrying Amount, Total 912,300
Accumulated Depreciation $ 97,642
Phoenix | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 47
Net Rentable Square Feet | ft² 3,253
2021 Encum- brances $ 0
Initial Cost, Land 92,139
Initial Cost, Building & Improvements 265,783
Costs Subsequent to Acquisition 38,278
Gross Carrying Amount, Land 92,130
Gross Carrying Amount, Buildings 304,070
Gross Carrying Amount, Total 396,200
Accumulated Depreciation $ 124,204
West Palm Beach | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 46
Net Rentable Square Feet | ft² 3,784
2021 Encum- brances $ 0
Initial Cost, Land 156,788
Initial Cost, Building & Improvements 221,479
Costs Subsequent to Acquisition 92,351
Gross Carrying Amount, Land 157,496
Gross Carrying Amount, Buildings 313,122
Gross Carrying Amount, Total 470,618
Accumulated Depreciation $ 146,989
San Antonio | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 39
Net Rentable Square Feet | ft² 2,746
2021 Encum- brances $ 0
Initial Cost, Land 53,847
Initial Cost, Building & Improvements 215,507
Costs Subsequent to Acquisition 29,301
Gross Carrying Amount, Land 53,805
Gross Carrying Amount, Buildings 244,850
Gross Carrying Amount, Total 298,655
Accumulated Depreciation $ 74,698
Austin | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 36
Net Rentable Square Feet | ft² 2,875
2021 Encum- brances $ 0
Initial Cost, Land 67,832
Initial Cost, Building & Improvements 179,672
Costs Subsequent to Acquisition 46,412
Gross Carrying Amount, Land 69,854
Gross Carrying Amount, Buildings 224,062
Gross Carrying Amount, Total 293,916
Accumulated Depreciation $ 99,914
Raleigh | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 36
Net Rentable Square Feet | ft² 2,592
2021 Encum- brances $ 0
Initial Cost, Land 82,919
Initial Cost, Building & Improvements 188,198
Costs Subsequent to Acquisition 40,568
Gross Carrying Amount, Land 83,908
Gross Carrying Amount, Buildings 227,777
Gross Carrying Amount, Total 311,685
Accumulated Depreciation $ 73,417
Norfolk | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 36
Net Rentable Square Feet | ft² 2,215
2021 Encum- brances $ 0
Initial Cost, Land 47,728
Initial Cost, Building & Improvements 128,986
Costs Subsequent to Acquisition 26,380
Gross Carrying Amount, Land 46,843
Gross Carrying Amount, Buildings 156,251
Gross Carrying Amount, Total 203,094
Accumulated Depreciation $ 77,313
Sacramento | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 35
Net Rentable Square Feet | ft² 2,054
2021 Encum- brances $ 0
Initial Cost, Land 26,429
Initial Cost, Building & Improvements 80,391
Costs Subsequent to Acquisition 40,500
Gross Carrying Amount, Land 26,913
Gross Carrying Amount, Buildings 120,407
Gross Carrying Amount, Total 147,320
Accumulated Depreciation $ 84,912
Indianapolis | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 29
Net Rentable Square Feet | ft² 1,889
2021 Encum- brances $ 0
Initial Cost, Land 34,678
Initial Cost, Building & Improvements 94,858
Costs Subsequent to Acquisition 18,348
Gross Carrying Amount, Land 35,678
Gross Carrying Amount, Buildings 112,206
Gross Carrying Amount, Total 147,884
Accumulated Depreciation $ 52,872
Kansas City | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 29
Net Rentable Square Feet | ft² 1,893
2021 Encum- brances $ 0
Initial Cost, Land 18,965
Initial Cost, Building & Improvements 92,793
Costs Subsequent to Acquisition 36,452
Gross Carrying Amount, Land 19,165
Gross Carrying Amount, Buildings 129,045
Gross Carrying Amount, Total 148,210
Accumulated Depreciation $ 65,887
Boston | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 28
Net Rentable Square Feet | ft² 1,964
2021 Encum- brances $ 0
Initial Cost, Land 80,843
Initial Cost, Building & Improvements 209,495
Costs Subsequent to Acquisition 37,378
Gross Carrying Amount, Land 81,409
Gross Carrying Amount, Buildings 246,307
Gross Carrying Amount, Total 327,716
Accumulated Depreciation $ 112,364
St. Louis | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 28
Net Rentable Square Feet | ft² 1,749
2021 Encum- brances $ 0
Initial Cost, Land 23,539
Initial Cost, Building & Improvements 89,341
Costs Subsequent to Acquisition 33,541
Gross Carrying Amount, Land 23,395
Gross Carrying Amount, Buildings 123,026
Gross Carrying Amount, Total 146,421
Accumulated Depreciation $ 67,368
Columbus | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 27
Net Rentable Square Feet | ft² 2,015
2021 Encum- brances $ 0
Initial Cost, Land 44,983
Initial Cost, Building & Improvements 92,001
Costs Subsequent to Acquisition 28,923
Gross Carrying Amount, Land 45,090
Gross Carrying Amount, Buildings 120,817
Gross Carrying Amount, Total 165,907
Accumulated Depreciation $ 53,150
Columbia | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 27
Net Rentable Square Feet | ft² 1,620
2021 Encum- brances $ 0
Initial Cost, Land 27,177
Initial Cost, Building & Improvements 83,532
Costs Subsequent to Acquisition 23,010
Gross Carrying Amount, Land 27,936
Gross Carrying Amount, Buildings 105,783
Gross Carrying Amount, Total 133,719
Accumulated Depreciation $ 43,214
Oklahoma City | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 26
Net Rentable Square Feet | ft² 2,089
2021 Encum- brances $ 0
Initial Cost, Land 49,060
Initial Cost, Building & Improvements 130,815
Costs Subsequent to Acquisition 14,475
Gross Carrying Amount, Land 49,060
Gross Carrying Amount, Buildings 145,290
Gross Carrying Amount, Total 194,350
Accumulated Depreciation $ 31,501
San Diego | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 24
Net Rentable Square Feet | ft² 2,183
2021 Encum- brances $ 0
Initial Cost, Land 89,782
Initial Cost, Building & Improvements 162,043
Costs Subsequent to Acquisition 50,358
Gross Carrying Amount, Land 92,292
Gross Carrying Amount, Buildings 209,891
Gross Carrying Amount, Total 302,183
Accumulated Depreciation $ 102,116
Las Vegas | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 23
Net Rentable Square Feet | ft² 1,503
2021 Encum- brances $ 0
Initial Cost, Land 26,242
Initial Cost, Building & Improvements 90,624
Costs Subsequent to Acquisition 13,313
Gross Carrying Amount, Land 25,491
Gross Carrying Amount, Buildings 104,688
Gross Carrying Amount, Total 130,179
Accumulated Depreciation $ 53,896
Cincinnati | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 20
Net Rentable Square Feet | ft² 1,155
2021 Encum- brances $ 0
Initial Cost, Land 19,035
Initial Cost, Building & Improvements 57,775
Costs Subsequent to Acquisition 23,981
Gross Carrying Amount, Land 18,953
Gross Carrying Amount, Buildings 81,838
Gross Carrying Amount, Total 100,791
Accumulated Depreciation $ 34,959
Nashville/Bowling Green | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 18
Net Rentable Square Feet | ft² 1,168
2021 Encum- brances $ 0
Initial Cost, Land 23,487
Initial Cost, Building & Improvements 45,145
Costs Subsequent to Acquisition 31,187
Gross Carrying Amount, Land 23,485
Gross Carrying Amount, Buildings 76,334
Gross Carrying Amount, Total 99,819
Accumulated Depreciation $ 33,956
Colorado Springs | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 16
Net Rentable Square Feet | ft² 1,115
2021 Encum- brances $ 0
Initial Cost, Land 12,320
Initial Cost, Building & Improvements 60,393
Costs Subsequent to Acquisition 22,949
Gross Carrying Amount, Land 12,317
Gross Carrying Amount, Buildings 83,345
Gross Carrying Amount, Total 95,662
Accumulated Depreciation $ 32,637
Milwaukee | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 15
Net Rentable Square Feet | ft² 964
2021 Encum- brances $ 0
Initial Cost, Land 13,189
Initial Cost, Building & Improvements 32,071
Costs Subsequent to Acquisition 10,534
Gross Carrying Amount, Land 13,158
Gross Carrying Amount, Buildings 42,636
Gross Carrying Amount, Total 55,794
Accumulated Depreciation $ 35,990
Louisville | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 15
Net Rentable Square Feet | ft² 912
2021 Encum- brances $ 0
Initial Cost, Land 23,563
Initial Cost, Building & Improvements 46,108
Costs Subsequent to Acquisition 8,315
Gross Carrying Amount, Land 23,562
Gross Carrying Amount, Buildings 54,424
Gross Carrying Amount, Total 77,986
Accumulated Depreciation $ 18,843
Jacksonville | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 15
Net Rentable Square Feet | ft² 922
2021 Encum- brances $ 0
Initial Cost, Land 14,454
Initial Cost, Building & Improvements 47,415
Costs Subsequent to Acquisition 12,466
Gross Carrying Amount, Land 14,503
Gross Carrying Amount, Buildings 59,832
Gross Carrying Amount, Total 74,335
Accumulated Depreciation $ 35,892
Birmingham | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 15
Net Rentable Square Feet | ft² 606
2021 Encum- brances $ 0
Initial Cost, Land 6,316
Initial Cost, Building & Improvements 25,567
Costs Subsequent to Acquisition 14,343
Gross Carrying Amount, Land 6,204
Gross Carrying Amount, Buildings 40,022
Gross Carrying Amount, Total 46,226
Accumulated Depreciation $ 29,192
Richmond | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 15
Net Rentable Square Feet | ft² 749
2021 Encum- brances $ 0
Initial Cost, Land 20,979
Initial Cost, Building & Improvements 52,239
Costs Subsequent to Acquisition 6,343
Gross Carrying Amount, Land 20,784
Gross Carrying Amount, Buildings 58,777
Gross Carrying Amount, Total 79,561
Accumulated Depreciation $ 22,365
Greensboro | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 14
Net Rentable Square Feet | ft² 845
2021 Encum- brances $ 0
Initial Cost, Land 13,413
Initial Cost, Building & Improvements 35,326
Costs Subsequent to Acquisition 14,407
Gross Carrying Amount, Land 15,502
Gross Carrying Amount, Buildings 47,644
Gross Carrying Amount, Total 63,146
Accumulated Depreciation $ 29,562
Charleston | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 14
Net Rentable Square Feet | ft² 943
2021 Encum- brances $ 0
Initial Cost, Land 16,947
Initial Cost, Building & Improvements 56,793
Costs Subsequent to Acquisition 18,448
Gross Carrying Amount, Land 17,923
Gross Carrying Amount, Buildings 74,265
Gross Carrying Amount, Total 92,188
Accumulated Depreciation $ 30,179
Fort Myers/Naples | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 14
Net Rentable Square Feet | ft² 1,070
2021 Encum- brances $ 0
Initial Cost, Land 29,944
Initial Cost, Building & Improvements 84,343
Costs Subsequent to Acquisition 6,276
Gross Carrying Amount, Land 30,179
Gross Carrying Amount, Buildings 90,384
Gross Carrying Amount, Total 120,563
Accumulated Depreciation $ 23,207
Chattanooga | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 13
Net Rentable Square Feet | ft² 846
2021 Encum- brances $ 0
Initial Cost, Land 10,030
Initial Cost, Building & Improvements 45,578
Costs Subsequent to Acquisition 7,832
Gross Carrying Amount, Land 9,832
Gross Carrying Amount, Buildings 53,608
Gross Carrying Amount, Total 63,440
Accumulated Depreciation $ 17,516
Savannah | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 12
Net Rentable Square Feet | ft² 700
2021 Encum- brances $ 0
Initial Cost, Land 33,094
Initial Cost, Building & Improvements 42,465
Costs Subsequent to Acquisition 5,271
Gross Carrying Amount, Land 31,766
Gross Carrying Amount, Buildings 49,064
Gross Carrying Amount, Total 80,830
Accumulated Depreciation $ 20,497
Greensville/Spartanburg/Asheville | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 12
Net Rentable Square Feet | ft² 697
2021 Encum- brances $ 0
Initial Cost, Land 9,835
Initial Cost, Building & Improvements 30,482
Costs Subsequent to Acquisition 10,542
Gross Carrying Amount, Land 10,764
Gross Carrying Amount, Buildings 40,095
Gross Carrying Amount, Total 50,859
Accumulated Depreciation $ 23,304
Honolulu | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 11
Net Rentable Square Feet | ft² 807
2021 Encum- brances $ 0
Initial Cost, Land 54,184
Initial Cost, Building & Improvements 106,299
Costs Subsequent to Acquisition 16,942
Gross Carrying Amount, Land 55,101
Gross Carrying Amount, Buildings 122,324
Gross Carrying Amount, Total 177,425
Accumulated Depreciation $ 73,250
Hartford/New Haven | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 11
Net Rentable Square Feet | ft² 693
2021 Encum- brances $ 0
Initial Cost, Land 6,778
Initial Cost, Building & Improvements 19,959
Costs Subsequent to Acquisition 22,722
Gross Carrying Amount, Land 8,443
Gross Carrying Amount, Buildings 41,016
Gross Carrying Amount, Total 49,459
Accumulated Depreciation $ 34,787
New Orleans | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 11
Net Rentable Square Feet | ft² 772
2021 Encum- brances $ 0
Initial Cost, Land 13,372
Initial Cost, Building & Improvements 59,382
Costs Subsequent to Acquisition 7,783
Gross Carrying Amount, Land 13,540
Gross Carrying Amount, Buildings 66,997
Gross Carrying Amount, Total 80,537
Accumulated Depreciation $ 28,812
Salt Lake City | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 11
Net Rentable Square Feet | ft² 672
2021 Encum- brances $ 0
Initial Cost, Land 15,912
Initial Cost, Building & Improvements 28,117
Costs Subsequent to Acquisition 5,603
Gross Carrying Amount, Land 15,561
Gross Carrying Amount, Buildings 34,071
Gross Carrying Amount, Total 49,632
Accumulated Depreciation $ 16,134
Memphis | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 11
Net Rentable Square Feet | ft² 645
2021 Encum- brances $ 0
Initial Cost, Land 19,581
Initial Cost, Building & Improvements 29,852
Costs Subsequent to Acquisition 9,956
Gross Carrying Amount, Land 20,934
Gross Carrying Amount, Buildings 38,455
Gross Carrying Amount, Total 59,389
Accumulated Depreciation $ 23,494
Mobile | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 11
Net Rentable Square Feet | ft² 529
2021 Encum- brances $ 0
Initial Cost, Land 8,915
Initial Cost, Building & Improvements 25,223
Costs Subsequent to Acquisition 5,814
Gross Carrying Amount, Land 8,742
Gross Carrying Amount, Buildings 31,210
Gross Carrying Amount, Total 39,952
Accumulated Depreciation $ 15,416
Omaha | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 10
Net Rentable Square Feet | ft² 881
2021 Encum- brances $ 0
Initial Cost, Land 17,266
Initial Cost, Building & Improvements 64,969
Costs Subsequent to Acquisition 4,245
Gross Carrying Amount, Land 17,266
Gross Carrying Amount, Buildings 69,214
Gross Carrying Amount, Total 86,480
Accumulated Depreciation $ 7,034
Buffalo/Rochester | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 9
Net Rentable Square Feet | ft² 462
2021 Encum- brances $ 0
Initial Cost, Land 6,785
Initial Cost, Building & Improvements 17,954
Costs Subsequent to Acquisition 4,159
Gross Carrying Amount, Land 6,783
Gross Carrying Amount, Buildings 22,115
Gross Carrying Amount, Total 28,898
Accumulated Depreciation $ 15,388
Cleveland/Akron | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 8
Net Rentable Square Feet | ft² 478
2021 Encum- brances $ 0
Initial Cost, Land 4,235
Initial Cost, Building & Improvements 18,411
Costs Subsequent to Acquisition 5,730
Gross Carrying Amount, Land 4,628
Gross Carrying Amount, Buildings 23,748
Gross Carrying Amount, Total 28,376
Accumulated Depreciation $ 13,911
Augusta | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 8
Net Rentable Square Feet | ft² 466
2021 Encum- brances $ 0
Initial Cost, Land 8,900
Initial Cost, Building & Improvements 20,906
Costs Subsequent to Acquisition 4,497
Gross Carrying Amount, Land 8,900
Gross Carrying Amount, Buildings 25,403
Gross Carrying Amount, Total 34,303
Accumulated Depreciation $ 7,844
Reno | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 7
Net Rentable Square Feet | ft² 559
2021 Encum- brances $ 0
Initial Cost, Land 5,487
Initial Cost, Building & Improvements 18,704
Costs Subsequent to Acquisition 4,277
Gross Carrying Amount, Land 5,487
Gross Carrying Amount, Buildings 22,981
Gross Carrying Amount, Total 28,468
Accumulated Depreciation $ 13,707
Tucson | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 7
Net Rentable Square Feet | ft² 439
2021 Encum- brances $ 0
Initial Cost, Land 9,403
Initial Cost, Building & Improvements 25,491
Costs Subsequent to Acquisition 6,959
Gross Carrying Amount, Land 9,884
Gross Carrying Amount, Buildings 31,969
Gross Carrying Amount, Total 41,853
Accumulated Depreciation $ 21,627
Wichita | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 7
Net Rentable Square Feet | ft² 433
2021 Encum- brances $ 0
Initial Cost, Land 2,017
Initial Cost, Building & Improvements 6,691
Costs Subsequent to Acquisition 7,411
Gross Carrying Amount, Land 2,130
Gross Carrying Amount, Buildings 13,989
Gross Carrying Amount, Total 16,119
Accumulated Depreciation $ 12,367
Monterey/Salinas | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 7
Net Rentable Square Feet | ft² 329
2021 Encum- brances $ 0
Initial Cost, Land 8,465
Initial Cost, Building & Improvements 24,151
Costs Subsequent to Acquisition 6,750
Gross Carrying Amount, Land 8,455
Gross Carrying Amount, Buildings 30,911
Gross Carrying Amount, Total 39,366
Accumulated Depreciation $ 23,392
Boise | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 6
Net Rentable Square Feet | ft² 530
2021 Encum- brances $ 0
Initial Cost, Land 13,412
Initial Cost, Building & Improvements 55,496
Costs Subsequent to Acquisition 545
Gross Carrying Amount, Land 13,412
Gross Carrying Amount, Buildings 56,041
Gross Carrying Amount, Total 69,453
Accumulated Depreciation $ 1,443
Evansville | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 5
Net Rentable Square Feet | ft² 326
2021 Encum- brances $ 0
Initial Cost, Land 2,340
Initial Cost, Building & Improvements 14,316
Costs Subsequent to Acquisition 1,513
Gross Carrying Amount, Land 2,312
Gross Carrying Amount, Buildings 15,857
Gross Carrying Amount, Total 18,169
Accumulated Depreciation $ 4,950
Dayton | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 5
Net Rentable Square Feet | ft² 284
2021 Encum- brances $ 0
Initial Cost, Land 1,074
Initial Cost, Building & Improvements 8,975
Costs Subsequent to Acquisition 4,868
Gross Carrying Amount, Land 1,073
Gross Carrying Amount, Buildings 13,844
Gross Carrying Amount, Total 14,917
Accumulated Depreciation $ 7,937
Huntsville/Decatur | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 5
Net Rentable Square Feet | ft² 298
2021 Encum- brances $ 0
Initial Cost, Land 9,161
Initial Cost, Building & Improvements 13,481
Costs Subsequent to Acquisition 3,421
Gross Carrying Amount, Land 9,108
Gross Carrying Amount, Buildings 16,955
Gross Carrying Amount, Total 26,063
Accumulated Depreciation $ 6,611
Fort Wayne | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 4
Net Rentable Square Feet | ft² 271
2021 Encum- brances $ 0
Initial Cost, Land 3,487
Initial Cost, Building & Improvements 11,003
Costs Subsequent to Acquisition 3,507
Gross Carrying Amount, Land 3,487
Gross Carrying Amount, Buildings 14,510
Gross Carrying Amount, Total 17,997
Accumulated Depreciation $ 6,181
Roanoke | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 4
Net Rentable Square Feet | ft² 224
2021 Encum- brances $ 0
Initial Cost, Land 5,093
Initial Cost, Building & Improvements 18,091
Costs Subsequent to Acquisition 973
Gross Carrying Amount, Land 5,093
Gross Carrying Amount, Buildings 19,064
Gross Carrying Amount, Total 24,157
Accumulated Depreciation $ 3,902
Palm Springs | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 3
Net Rentable Square Feet | ft² 242
2021 Encum- brances $ 0
Initial Cost, Land 8,309
Initial Cost, Building & Improvements 18,065
Costs Subsequent to Acquisition 2,249
Gross Carrying Amount, Land 8,309
Gross Carrying Amount, Buildings 20,314
Gross Carrying Amount, Total 28,623
Accumulated Depreciation $ 12,060
Providence | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 3
Net Rentable Square Feet | ft² 155
2021 Encum- brances $ 0
Initial Cost, Land 995
Initial Cost, Building & Improvements 11,206
Costs Subsequent to Acquisition 3,143
Gross Carrying Amount, Land 995
Gross Carrying Amount, Buildings 14,349
Gross Carrying Amount, Total 15,344
Accumulated Depreciation $ 7,414
Shreveport | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 2
Net Rentable Square Feet | ft² 150
2021 Encum- brances $ 0
Initial Cost, Land 817
Initial Cost, Building & Improvements 3,030
Costs Subsequent to Acquisition 2,377
Gross Carrying Amount, Land 741
Gross Carrying Amount, Buildings 5,483
Gross Carrying Amount, Total 6,224
Accumulated Depreciation $ 4,997
Springfield/Holyoke | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 2
Net Rentable Square Feet | ft² 144
2021 Encum- brances $ 0
Initial Cost, Land 1,428
Initial Cost, Building & Improvements 3,380
Costs Subsequent to Acquisition 1,952
Gross Carrying Amount, Land 1,427
Gross Carrying Amount, Buildings 5,333
Gross Carrying Amount, Total 6,760
Accumulated Depreciation $ 5,114
Rochester | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 2
Net Rentable Square Feet | ft² 99
2021 Encum- brances $ 0
Initial Cost, Land 1,047
Initial Cost, Building & Improvements 2,246
Costs Subsequent to Acquisition 2,134
Gross Carrying Amount, Land 980
Gross Carrying Amount, Buildings 4,447
Gross Carrying Amount, Total 5,427
Accumulated Depreciation $ 4,233
Santa Barbara | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 2
Net Rentable Square Feet | ft² 98
2021 Encum- brances $ 0
Initial Cost, Land 5,733
Initial Cost, Building & Improvements 9,106
Costs Subsequent to Acquisition 858
Gross Carrying Amount, Land 5,733
Gross Carrying Amount, Buildings 9,964
Gross Carrying Amount, Total 15,697
Accumulated Depreciation $ 6,186
Topeka | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 2
Net Rentable Square Feet | ft² 94
2021 Encum- brances $ 0
Initial Cost, Land 225
Initial Cost, Building & Improvements 1,419
Costs Subsequent to Acquisition 2,108
Gross Carrying Amount, Land 225
Gross Carrying Amount, Buildings 3,527
Gross Carrying Amount, Total 3,752
Accumulated Depreciation $ 3,190
Lansing | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 2
Net Rentable Square Feet | ft² 88
2021 Encum- brances $ 0
Initial Cost, Land 556
Initial Cost, Building & Improvements 2,882
Costs Subsequent to Acquisition 986
Gross Carrying Amount, Land 556
Gross Carrying Amount, Buildings 3,868
Gross Carrying Amount, Total 4,424
Accumulated Depreciation $ 2,619
Flint | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 1
Net Rentable Square Feet | ft² 56
2021 Encum- brances $ 0
Initial Cost, Land 543
Initial Cost, Building & Improvements 3,068
Costs Subsequent to Acquisition 273
Gross Carrying Amount, Land 542
Gross Carrying Amount, Buildings 3,342
Gross Carrying Amount, Total 3,884
Accumulated Depreciation $ 2,110
Joplin | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 1
Net Rentable Square Feet | ft² 56
2021 Encum- brances $ 0
Initial Cost, Land 264
Initial Cost, Building & Improvements 904
Costs Subsequent to Acquisition 1,021
Gross Carrying Amount, Land 264
Gross Carrying Amount, Buildings 1,925
Gross Carrying Amount, Total 2,189
Accumulated Depreciation $ 1,672
Syracuse | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 1
Net Rentable Square Feet | ft² 55
2021 Encum- brances $ 0
Initial Cost, Land 545
Initial Cost, Building & Improvements 1,279
Costs Subsequent to Acquisition 862
Gross Carrying Amount, Land 545
Gross Carrying Amount, Buildings 2,141
Gross Carrying Amount, Total 2,686
Accumulated Depreciation $ 2,066
Modesto/Fresno/Stockton | Self-storage facilities  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
No. of Facilities | storageFacility 1
Net Rentable Square Feet | ft² 33
2021 Encum- brances $ 0
Initial Cost, Land 44
Initial Cost, Building & Improvements 206
Costs Subsequent to Acquisition 1,324
Gross Carrying Amount, Land 193
Gross Carrying Amount, Buildings 1,381
Gross Carrying Amount, Total 1,574
Accumulated Depreciation $ 942
Minimum  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
Estimated useful lives of buildings and improvements (in years) 5 years
Maximum  
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]  
Estimated useful lives of buildings and improvements (in years) 25 years