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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 |  |  |

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