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Summary of Significant Accounting Policies - Additional Information (Detail)
shares in Millions
 12 Months Ended
Mar. 01, 2022
Dec. 31, 2022
USD ($)
Segment
Trademark
shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
shares
Summary Of Significant Accounting Policies [Line Items]        
Payments to acquire intangible assets   $ 10,500,000 $ 21,500,000 $ 0
Business acquisition, transaction costs   900,000 900,000 1,400,000
Impairment losses of real property assets recognized   0 0 0
Indefinite lived trademark   15,911,765 16,052,941  
Allowance for doubtful accounts   700,000 500,000  
Gross amounts of lease intangibles   78,600,000 68,600,000  
Accumulated amortization   $ 71,100,000 56,800,000  
Maximum annual contributions per employee, percentage   100.00%    
Redemptions of common stock   $ 2,400,000 $ 5,600,000 $ 2,000,000.0
Redemptions of common stock (in shares) | shares   0.2 0.4 0.2
Employer matching contributions, amount   $ 500,000 $ 200,000  
Employer matching contribution, percent   100.00%    
Employer matching contribution, percent of match   4.00%    
Minimum percentage of ordinary taxable income to be distributed to stockholders   90.00%    
Number of reportable business segments | Segment   2    
Rental Income | Geographic Concentration Risk | Florida        
Summary Of Significant Accounting Policies [Line Items]        
Concentration Risk Percentage1   23.00%    
Rental Income | Geographic Concentration Risk | California        
Summary Of Significant Accounting Policies [Line Items]        
Concentration Risk Percentage1   20.10%    
Rental Income | Geographic Concentration Risk | Greater Toronto Area of Canada        
Summary Of Significant Accounting Policies [Line Items]        
Concentration Risk Percentage1   9.80%    
Real Estate Investment        
Summary Of Significant Accounting Policies [Line Items]        
Gains (losses) on exchange rate changes in equity investments recorded in other income (expense)   $ 9,600,000 3,800,000  
Class T Common stock        
Summary Of Significant Accounting Policies [Line Items]        
Monthly stockholder servicing fee accrual description   accrued daily in an amount equal to 1/365th of 1% of the purchase price per share    
Redeemable Common Stock        
Summary Of Significant Accounting Policies [Line Items]        
Redemptions of common stock     1,700,000 $ 700,000
Redeemable Common Stock | Share Redemption Program        
Summary Of Significant Accounting Policies [Line Items]        
Redemptions of common stock     3,900,000 $ 1,300,000
Revolving Credit Facility        
Summary Of Significant Accounting Policies [Line Items]        
Debt issuance cost, gross   $ 4,500,000 4,100,000  
Accumulated amortization of debt issuance costs   2,400,000 800,000  
Non Revolving Debt        
Summary Of Significant Accounting Policies [Line Items]        
Debt issuance cost, gross   7,000,000.0 5,800,000  
Accumulated amortization of debt issuance costs   2,500,000 1,900,000  
Self Storage        
Summary Of Significant Accounting Policies [Line Items]        
Total estimated future amortization expense of intangible assets, year 2023   6,400,000    
Total estimated future amortization expense of intangible assets, year 2024   100,000    
Total estimated future amortization expense of intangible assets, year 2025   100,000    
Total estimated future amortization expense of intangible assets, year 2026   100,000    
Total estimated future amortization expense of intangible assets, thereafter   $ 800,000    
Minimum        
Summary Of Significant Accounting Policies [Line Items]        
Estimated useful life   3 years    
Maximum        
Summary Of Significant Accounting Policies [Line Items]        
Estimated useful life   5 years    
Strategic Storage Trademark        
Summary Of Significant Accounting Policies [Line Items]        
Trademarks acquired amount   $ 200,000 400,000  
Indefinite lived trademark   15,700,000 15,700,000  
Total estimated future amortization expense of intangible assets, year 2023   140,000    
Total estimated future amortization expense of intangible assets, year 2024   70,000    
Total estimated future amortization expense of intangible assets, thereafter   $ 0    
Self Administration Transaction        
Summary Of Significant Accounting Policies [Line Items]        
Number of trademarks acquired | Trademark   2    
Total estimated future amortization expense of intangible assets, year 2023   $ 55,000    
Total estimated future amortization expense of intangible assets, year 2024   55,000    
Total estimated future amortization expense of intangible assets, year 2025   0    
Gross amounts of lease intangibles   9,900,000 6,800,000  
Accumulated amortization   1,800,000 4,300,000  
Pacific Oak Holding Group        
Summary Of Significant Accounting Policies [Line Items]        
Variable interest entity non-voting ownership percentage 10.00%      
Operating Expense        
Summary Of Significant Accounting Policies [Line Items]        
Advertising costs   4,400,000 3,700,000  
General and Administrative Expense        
Summary Of Significant Accounting Policies [Line Items]        
Advertising costs   $ 1,300,000 $ 700,000