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Investments in Unconsolidated Real Estate Ventures - Additional Information (Details) |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended |  |  |  |  |  |  |
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Mar. 01, 2023 RealEstateVenture | Jan. 12, 2023 USD ($) | Jan. 12, 2023 CAD ($) | Jun. 01, 2022 USD ($) | May 25, 2022 USD ($) | May 25, 2022 CAD ($) | Apr. 30, 2021 | Nov. 10, 2020 RealEstateVenture | Mar. 31, 2023 USD ($) RealEstateVenture Property | Mar. 31, 2022 USD ($) | Dec. 31, 2027 USD ($) | Dec. 31, 2026 USD ($) | Dec. 31, 2023 USD ($) | Mar. 31, 2023 CAD ($) RealEstateVenture Property | Dec. 31, 2022 USD ($) | Dec. 31, 2022 CAD ($) | Sep. 13, 2022 CAD ($) | Jun. 01, 2022 CAD ($) | Oct. 07, 2021 USD ($) | Aug. 18, 2021 CAD ($) | Mar. 17, 2021 StorageFacility
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  | $ 33,400,000 |  |  |  |  |  |  |  |  |  |  |  |
Increased amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 120,000,000 |  |  |  |
Initial maximum amount available |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 700,000,000 |  |
Guarantee obligations recourse percentage |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  | 50.00% |  |  |  |  |  |  |
Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fund development costs |  |  |  |  |  |  |  |  |  |  | $ 3,000,000 | $ 3,000,000 | $ 2,000,000 |  |  |  |  |  |  |  |
SmartCentres Storage Finance LP | Master Mortgage Commitment Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding amount |  |  |  |  |  |  |  |  | $ 88,000,000.0 |  |  |  |  | $ 119,200,000 | $ 86,100,000 | $ 116,700,000 |  |  |  |  |
Initial maximum amount available |  |  |  |  |  |  |  |  | 7.10% |  |  |  |  |  |  |  |  |  |  |  |
Maturity date |  |  |  |  |  |  | May 11, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan to value ratio |  |  |  |  |  |  |  |  | 70.00% |  |  |  |  | 70.00% |  |  |  |  |  |  |
Regent Property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  | 50.00% | 50.00% |  |  | 50.00% |  |  |  |  | 50.00% |  |  |  |  |  |  |
Regent Property | SmartCentres Storage Finance LP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  | 50.00% | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Whitby Property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  | 50.00% | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Whitby Property | SmartCentres Storage Finance LP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  | 50.00% | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
North Whitby Property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase Price Percentage |  | 50.00% | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  | $ 2,000,000.0 | $ 2,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Canada |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity in earnings (loss) of unconsolidated real estate ventures |  |  |  |  |  |  |  |  | $ 400,000 | $ 200,000 |  |  |  |  |  |  |  |  |  |  |
Purchase Price Percentage |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  | $ 7,700,000 |  |  |  |  |  |  |  |  |  |  |  |
Canada | Regent Property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  | 50.00% |  |  |  |  |  |  |
Canada | Regent Property | SmartCentres Storage Finance LP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  | 50.00% |  |  |  |  |  |  |
Kingspoint Ontario | SmartCentres Storage Finance LP | Master Mortgage Commitment Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increased amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 120,000,000 |
SST IV Merger Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of operating real estate properties | Property |  |  |  |  |  |  |  |  | 3 |  |  |  |  | 3 |  |  |  |  |  |  |
SST IV Merger Agreement | Canada |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of self storage real estate joint ventures | RealEstateVenture |  |  |  |  |  |  |  | 6 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of operating real estate properties | StorageFacility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3
Number of development real estate properties | StorageFacility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3
Regent Property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase Price Percentage |  |  |  |  | 50.00% | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  | $ 2,700,000 | $ 3,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SSGT II Merger Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of operating real estate properties | Property |  |  |  |  |  |  |  |  | 1 |  |  |  |  | 1 |  |  |  |  |  |  |
Purchase price |  |  |  | $ 261,158,513 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SSGT II Merger Agreement | SmartCentres Storage Finance LP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial maximum amount available |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 34,300,000 |  |  |
Guarantee obligations recourse percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |
SSGT II Merger Agreement | Dupont and Aurora Joint Venture Properties | SmartCentres Storage Finance LP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |
SSGT II Merger Agreement | Canada |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments In Unconsolidated Real Estate Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of self storage real estate joint ventures | RealEstateVenture | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of operating real estate properties | RealEstateVenture |  |  |  |  |  |  |  |  | 2 |  |  |  |  | 2 |  |  |  |  |  |  |
Number of development real estate properties | RealEstateVenture |  |  |  |  |  |  |  |  | 1 |  |  |  |  | 1 |  |  |  |  |  |  |

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