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Summary of Significant Accounting Policies - Additional Information (Detail)
 3 Months Ended
Mar. 01, 2022
Mar. 31, 2023
USD ($)
Segment
Trademark
Mar. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
Summary Of Significant Accounting Policies [Line Items]        
Payments to acquire intangible assets   $ 0 $ 800,000  
Business acquisition, transaction costs   100,000 400,000  
Impairment losses of real property assets recognized   0 $ 0  
Indefinite lived trademark   15,876,470   $ 15,911,765
Total estimated future amortization expense of intangible assets, thereafter   700,000    
Allowance for doubtful accounts   600,000   700,000
Gross amounts of lease intangibles   88,500,000   88,500,000
Accumulated amortization   $ 74,800,000   72,900,000
Maximum annual contributions per employee, percentage   100.00%    
Minimum percentage of ordinary taxable income to be distributed to stockholders   90.00%    
Employer matching contribution, percent   100.00%    
Employer matching contribution, percent of match     4.00%  
Employer matching contributions, amount   $ 200,000 $ 200,000  
Number of reportable business segments | Segment   2    
Rental Income | Geographic Concentration Risk | Florida        
Summary Of Significant Accounting Policies [Line Items]        
Concentration Risk Percentage1   23.10%    
Rental Income | Geographic Concentration Risk | Greater Toronto Area of Canada        
Summary Of Significant Accounting Policies [Line Items]        
Concentration Risk Percentage1   9.90%    
Rental Income | Geographic Concentration Risk | California        
Summary Of Significant Accounting Policies [Line Items]        
Concentration Risk Percentage1   20.20%    
Real Estate Investment        
Summary Of Significant Accounting Policies [Line Items]        
Gains (losses) on exchange rate changes in equity investments recorded in other income (expense)   $ 35,000,000,000 2,000,000.0  
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    
Revolving Credit Facility        
Summary Of Significant Accounting Policies [Line Items]        
Debt issuance cost, gross   $ 4,500,000   4,500,000
Accumulated amortization of debt issuance costs   2,800,000   2,400,000
Non Revolving Debt        
Summary Of Significant Accounting Policies [Line Items]        
Debt issuance cost, gross   6,800,000   7,000,000.0
Accumulated amortization of debt issuance costs   2,600,000   2,500,000
Self Storage        
Summary Of Significant Accounting Policies [Line Items]        
Total estimated future amortization expense of intangible assets, year 2022   4,500,000    
Total estimated future amortization expense of intangible assets, year 2023   200,000    
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    
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   $ 200,000
Indefinite lived trademark   15,700,000    
Total estimated future amortization expense of intangible assets, year 2022   105,000    
Total estimated future amortization expense of intangible assets, year 2023   71,000    
Finite Lived Intangible Assets Amortization Expense After Year Two   $ 0    
Self Administration Transaction        
Summary Of Significant Accounting Policies [Line Items]        
Number of trademarks acquired | Trademark   2    
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   $ 1,200,000 1,000,000.0  
General and Administrative Expense        
Summary Of Significant Accounting Policies [Line Items]        
Advertising costs   $ 500,000 $ 0.1