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Related Party Transactions (Details) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2023 USD ($) storage_facility adult_children | Sep. 30, 2022 USD ($)
Related Party Transaction [Line Items] |  |
Tenants reinsurance premiums earned by subsidiaries |  | $ 1.7
Premium Payments |  |
Related Party Transaction [Line Items] |  |
Tenants reinsurance premiums earned by subsidiaries | $ 1.6 |
Hughes Owned Canadian Facilities | Canada | Related Party |  |
Related Party Transaction [Line Items] |  |
Number of self-storage facilities | storage_facility | 65 |
Number of Ms. Gustavson's adult children owning remaining equity in LLC | adult_children | 2 |
Ownership interest by parent | 0.00% |
Tamara Hughes Gustavson | Hughes Owned Canadian Facilities | Canada | Related Party |  |
Related Party Transaction [Line Items] |  |
Ownership interest of noncontrolling owners (less than) | 0.10% |

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