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Preferred Stock, Dividend Rate Increase, Threshold

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The percentage of excess profit participation in unconsolidated joint ventures.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The cash outflow associated with the purchase of all investments (debt, security, other) during the period.

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The carrying amount of investments in unconsolidated real estate and other joint ventures not separately presented. This includes direct and indirect investments.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Investments in Unconsolidated Real Estate Entities (Details) $ in Thousands		1 Months Ended
	Feb. 04, 2025 USD ($)	May 31, 2023 USD ($)	Mar. 31, 2026 USD ($) property	Dec. 31, 2025 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property			408
Investment balance			$ 995,314	$ 993,082
Investments in unconsolidated real estate entities			1,069,602	1,066,783
Cash distributions in unconsolidated real estate ventures			$ (74,288)	(73,701)
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			$ 8,716	8,736
HF1 Sovran HHF Storage Holdings LLC
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property			37
Equity Ownership %			49.00%
Investment balance			$ 300,789	301,794
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			$ (10,835)	(10,588)
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			$ 46,153	46,310
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			$ (44,829)	(44,537)
HF2 Sovran HHF Storage Holdings II LLC
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property			22
Equity Ownership %			49.00%
Investment balance			$ 112,330	112,551
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			$ 24,417	24,580
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			$ 9,178	9,525
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			$ (18,623)	(18,576)
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			$ 17,853	18,082
Other unconsolidated real estate ventures
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property			106
Investment balance			$ 300,165	295,205
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%
Strategic Storage Growth Trust III, Inc. Preferred Stock
Schedule of Equity Method Investments [Line Items]
Investment balance			$ 100,000	100,000
Strategic Storage Trust VI, Inc. Preferred Stock
Schedule of Equity Method Investments [Line Items]
Investment balance			$ 150,000	$ 150,000
Dividend rate, percentage		8.35%
Dividend rate increase, threshold		5 years
Redemption period		3 years
Investment in shares		$ 150,000
Strategic Storage Growth Trust III, Inc.
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