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Investments in Unconsolidated Real Estate Entities - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Feb. 04, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]        
Investment balance   $ 1,257,019 $ 1,000,548  
Amortization amount of excess purchase price included in equity earnings   $ 60,253    
Amortization period of excess purchase price included in equity earnings   39 years    
Management fee revenues   $ 38,940 $ 31,755 $ 24,389
Strategic Storage Growth Trust III, Inc. | Subsequent Event        
Schedule of Equity Method Investments [Line Items]        
Investment balance $ 100,000      
Dividend rate, percentage 8.85%      
Dividend rate increase threshold 5 years      
Redemption period 5 years