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Investments in Unconsolidated Real Estate Entities - Schedule of Investments in Unconsolidated Real Estate Ventures (Details) $ in Thousands |  | 1 Months Ended |  |  |
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Nov. 30, 2024 USD ($) | Sep. 30, 2024 USD ($) joint_venture | Aug. 31, 2024 USD ($) store | May 31, 2023 USD ($) | Oct. 31, 2019 USD ($) | Dec. 31, 2024 USD ($) property | Oct. 31, 2024 | Dec. 31, 2023 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of Stores | property |  |  |  |  |  | 460 |  |
Investment balance |  |  |  |  |  | $ 1,257,019 |  | $ 1,000,548
Investments in unconsolidated real estate entities |  |  |  |  |  | 1,332,338 |  | 1,071,617
Cash distributions in unconsolidated real estate ventures |  |  |  |  |  | (75,319) |  | (71,069)
Net Investments in and Cash distributions in unconsolidated real estate entities |  |  |  |  |  | $ 1,257,019 |  | 1,000,548
ESS Bristol Investments LLC |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of Stores | store |  |  | 8 |  |  |  |  |
Number of stores sold | store |  |  | 5 |  |  |  |  |
Gain on sale of joint ventures |  |  | $ 10,324 |  |  |  |  |
PRISA Self Storage LLC |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of Stores | property |  |  |  |  |  | 85 |  |
Equity Ownership % |  |  |  |  |  | 4.00% |  |
Excess Profit % |  |  |  |  |  | 4.00% |  |
Investment balance |  |  |  |  |  | $ 8,967 |  | 9,435
Net Investments in and Cash distributions in unconsolidated real estate entities |  |  |  |  |  | $ 8,967 |  | 9,435
HF1 Sovran HHF Storage Holdings LLC |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of Stores | property |  |  |  |  |  | 37 |  |
Equity Ownership % | 49.00% |  |  |  |  | 49.00% | 20.00% |
Investment balance |  |  |  |  |  | $ 304,526 |  | 105,339
Net Investments in and Cash distributions in unconsolidated real estate entities |  |  |  |  |  | $ 304,526 |  | 105,339
HF1 Sovran HHF Storage Holdings LLC | Minimum |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Excess Profit % |  |  |  |  |  | 49.00% |  |
HF1 Sovran HHF Storage Holdings LLC | Maximum |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Excess Profit % |  |  |  |  |  | 59.00% |  |
Storage Portfolio II JV LLC |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of Stores | property |  |  |  |  |  | 36 |  |
Equity Ownership % |  |  |  |  |  | 10.00% |  |
Excess Profit % |  |  |  |  |  | 30.00% |  |
Investment balance |  |  |  |  |  | $ (9,584) |  | (8,314)
Net Investments in and Cash distributions in unconsolidated real estate entities |  |  |  |  |  | $ (9,584) |  | (8,314)
Storage Portfolio IV JV LLC |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of Stores | property |  |  |  |  |  | 32 |  |
Equity Ownership % |  |  |  |  |  | 10.00% |  |
Excess Profit % |  |  |  |  |  | 30.00% |  |
Investment balance |  |  |  |  |  | $ 47,150 |  | 48,184
Net Investments in and Cash distributions in unconsolidated real estate entities |  |  |  |  |  | $ 47,150 |  | 48,184
Storage Portfolio I LLC |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of Stores | property |  |  |  |  |  | 24 |  |
Equity Ownership % |  |  |  |  |  | 34.00% |  |
Excess Profit % |  |  |  |  |  | 49.00% |  |
Investment balance |  |  |  |  |  | $ (43,803) |  | (42,487)
Net Investments in and Cash distributions in unconsolidated real estate entities |  |  |  |  |  | $ (43,803) |  | (42,487)
PR II EXR JV LLC |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of Stores | property |  |  |  |  |  | 23 |  |
Equity Ownership % |  |  |  |  |  | 25.00% |  |
Excess Profit % |  |  |  |  |  | 25.00% |  |
Investment balance |  |  |  |  |  | $ 105,909 |  | 108,160
Net Investments in and Cash distributions in unconsolidated real estate entities |  |  |  |  |  | $ 105,909 |  | 108,160
HF2 Sovran HHF Storage Holdings II LLC |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of Stores | property |  |  |  |  |  | 22 |  |
Equity Ownership % | 49.00% |  |  |  |  | 49.00% | 15.00% |
Investment balance |  |  |  |  |  | $ 114,034 |  | 41,613
Net Investments in and Cash distributions in unconsolidated real estate entities |  |  |  |  |  | $ 114,034 |  | 41,613
HF2 Sovran HHF Storage Holdings II LLC | Minimum |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Excess Profit % |  |  |  |  |  | 49.00% |  |
HF2 Sovran HHF Storage Holdings II LLC | Maximum |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Excess Profit % |  |  |  |  |  | 59.00% |  |
HF5 Life Storage-HIERS Storage LLC |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of Stores | property |  |  |  |  |  | 17 |  |
Equity Ownership % |  |  |  |  |  | 20.00% |  |
Excess Profit % |  |  |  |  |  | 20.00% |  |
Investment balance |  |  |  |  |  | $ 25,192 |  | 26,051
Net Investments in and Cash distributions in unconsolidated real estate entities |  |  |  |  |  | $ 25,192 |  | 26,051
HF6 191 V Life Storage Holdings LLC |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of Stores | property |  |  |  |  |  | 17 |  |
Equity Ownership % |  |  |  |  |  | 20.00% |  |
Excess Profit % |  |  |  |  |  | 20.00% |  |
Investment balance |  |  |  |  |  | $ 10,821 |  | 12,702
Net Investments in and Cash distributions in unconsolidated real estate entities |  |  |  |  |  | $ 10,821 |  | 12,702
ESS-CA TIVS JV LP |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of Stores | property |  |  |  |  |  | 16 |  |
Equity Ownership % |  |  |  |  |  | 55.00% |  |
Investment balance |  |  |  |  |  | $ 27,217 |  | 29,128
Net Investments in and Cash distributions in unconsolidated real estate entities |  |  |  |  |  | $ 27,217 |  | 29,128
ESS-CA TIVS JV LP | Minimum |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Excess Profit % |  |  |  |  |  | 55.00% |  |
ESS-CA TIVS JV LP | Maximum |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Excess Profit % |  |  |  |  |  | 65.00% |  |
VRS Self Storage, LLC |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of Stores | property |  |  |  |  |  | 16 |  |
Equity Ownership % |  |  |  |  |  | 45.00% |  |
Excess Profit % |  |  |  |  |  | 54.00% |  |
Investment balance |  |  |  |  |  | $ (17,557) |  | (16,386)
Net Investments in and Cash distributions in unconsolidated real estate entities |  |  |  |  |  | $ (17,557) |  | (16,386)
HF10 Life Storage HHF Wasatch Holdings LLC |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of Stores | property |  |  |  |  |  | 16 |  |
Equity Ownership % |  |  |  |  |  | 20.00% |  |
Excess Profit % |  |  |  |  |  | 20.00% |  |
Investment balance |  |  |  |  |  | $ 19,295 |  | 20,019
Net Investments in and Cash distributions in unconsolidated real estate entities |  |  |  |  |  | $ 19,295 |  | 20,019
Other unconsolidated real estate ventures |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of Stores | property |  |  |  |  |  | 119 |  |
Investment balance |  |  |  |  |  | $ 314,852 |  | 317,104
Net Investments in and Cash distributions in unconsolidated real estate entities |  |  |  |  |  | $ 314,852 |  | 317,104
Other unconsolidated real estate ventures | Minimum |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Equity Ownership % |  |  |  |  |  | 10.00% |  |
Excess Profit % |  |  |  |  |  | 10.00% |  |
Other unconsolidated real estate ventures | Maximum |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Equity Ownership % |  |  |  |  |  | 50.00% |  |
Excess Profit % |  |  |  |  |  | 50.00% |  |
SmartStop Self Storage REIT Inc Preferred Stock |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Investment balance |  |  |  |  | $ 200,000 | $ 200,000 |  | 200,000
Net Investments in and Cash distributions in unconsolidated real estate entities |  |  |  |  | $ 200,000 | 200,000 |  | 200,000
Dividend rate, percentage |  |  |  |  | 6.25% |  |  |
Investment, preferred dividend rate |  |  |  |  | 7.00% |  |  |
Redemption restriction period |  |  |  |  | 5 years |  |  |
Alan Jathoo JV LLC |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of stores sold | joint_venture |  | 9 |  |  |  |  |  |
Gain on sale of joint ventures |  | $ 3,406 |  |  |  |  |  |
ESS Bristol Investments LLC |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of stores purchased | store |  |  | 3 |  |  |  |  |
Strategic Storage Trust VI, Inc. Preferred Stock |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Investment balance |  |  |  |  |  | 150,000 |  | 150,000
Net Investments in and Cash distributions in unconsolidated real estate entities |  |  |  |  |  | $ 150,000 |  | $ 150,000
Payments to acquire investments |  |  |  | $ 150,000 |  |  |  |
Dividend rate, percentage |  |  |  | 8.35% |  |  |  |
Dividend rate increase threshold |  |  |  | 5 years |  |  |  |
Redemption period |  |  |  | 3 years |  |  |  |
Sovran HHF Storage Holdings LLC and HF2 Sovran HHF Storage Holdings II LLC |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Cash consideration | $ 251,235 |  |  |  |  |  |  |

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