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Equity Method Investment, Number Of Stores

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Equity Method Investment, Ownership Percentage Exchanged

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Equity Method Investments, Number of Joint Ventures

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Investment In Unconsolidated Real Estate Entities, Net Of Distributions

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Preferred Stock, Dividend Rate Increase, Threshold

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Preferred Stock Investment, Dividend Rate

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Preferred Stock, Redemption Period

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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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Amount of gain (loss) on sale or disposal of an equity method investment.

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The amount of debt that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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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 percentage rate used to calculate dividend payments on preferred stock.

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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		3 Months Ended						9 Months Ended
	Jul. 08, 2025 USD ($) property	Apr. 30, 2025 USD ($) jointVenture property joint_venture	Mar. 31, 2025 property	Feb. 04, 2025 USD ($)	May 31, 2023 USD ($)	Oct. 31, 2019 USD ($)	Sep. 30, 2025 USD ($) property	Jun. 30, 2025 USD ($)	Mar. 31, 2025 USD ($) property	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Sep. 30, 2025 USD ($) property	Sep. 30, 2024 USD ($)	Apr. 04, 2025 USD ($)	Dec. 31, 2024 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property							411						411
Investment balance							$ 986,264						$ 986,264			$ 1,257,019
Investments in unconsolidated real estate entities							1,063,969						1,063,969			1,332,338
Cash distributions in unconsolidated real estate ventures							(77,705)						(77,705)			(75,319)
Assumed debt							$ 0	$ 258,000	$ 0	$ 0	$ 0	$ 0	$ 258,000	$ 0
Number of joint ventures \| joint_venture		2
PRISA Self Storage LLC
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property							85						85
Equity Ownership %							4.00%						4.00%
Excess Profit %							4.00%						4.00%
Investment balance							$ 8,795						$ 8,795			8,967
HF1 Sovran HHF Storage Holdings LLC
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property							37						37
Equity Ownership %							49.00%						49.00%
Investment balance							$ 302,356						$ 302,356			304,526
HF1 Sovran HHF Storage Holdings LLC \| Minimum
Schedule of Equity Method Investments [Line Items]
Excess Profit %							49.00%						49.00%
HF1 Sovran HHF Storage Holdings LLC \| Maximum
Schedule of Equity Method Investments [Line Items]
Excess Profit %							59.00%						59.00%
Storage Portfolio II JV LLC
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property							36						36
Equity Ownership %							10.00%						10.00%
Excess Profit %							30.00%						30.00%
Investment balance							$ (10,261)						$ (10,261)			(9,584)
Storage Portfolio IV JV LLC
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property							32						32
Equity Ownership %							10.00%						10.00%
Excess Profit %							30.00%						30.00%
Investment balance							$ 46,507						$ 46,507			47,150
Storage Portfolio I LLC
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property							24						24
Equity Ownership %							34.00%						34.00%
Excess Profit %							49.00%						49.00%
Investment balance							$ (44,357)						$ (44,357)			(43,803)
ESS CA-TIVS JV LP
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property							0						0
Equity Ownership %							55.00%						55.00%
Investment balance							$ 0						$ 0			27,217
ESS CA-TIVS JV LP \| Minimum
Schedule of Equity Method Investments [Line Items]
Excess Profit %							55.00%						55.00%
ESS CA-TIVS JV LP \| Maximum
Schedule of Equity Method Investments [Line Items]
Excess Profit %							65.00%						65.00%
HF2 Sovran HHF Storage Holdings II LLC
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property							22						22
Equity Ownership %							49.00%						49.00%
Investment balance							$ 112,784						$ 112,784			114,034
HF2 Sovran HHF Storage Holdings II LLC \| Minimum
Schedule of Equity Method Investments [Line Items]
Excess Profit %							49.00%						49.00%
HF2 Sovran HHF Storage Holdings II LLC \| Maximum
Schedule of Equity Method Investments [Line Items]
Excess Profit %							59.00%						59.00%
HF5 Life Storage-HIERS Storage LLC
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property							17						17
Equity Ownership %							20.00%						20.00%
Excess Profit %							20.00%						20.00%
Investment balance							$ 24,716						$ 24,716			25,192
HF6 191 V Life Storage Holdings LLC
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property							17						17
Equity Ownership %							20.00%						20.00%
Excess Profit %							20.00%						20.00%
Investment balance							$ 9,824						$ 9,824			10,821
PR II EXR JV LLC
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property			6				0		6				0
Equity Ownership %			25.00%				25.00%		25.00%				25.00%
Excess Profit %							25.00%						25.00%
Investment balance							$ 0						$ 0			105,909
Number of properties acquired \| property			6						6
Number of properties exchanged \| property			17						17
Number of properties in portfolio \| property			23						23
Ownership percentage after transaction			100.00%
PR II EXR JV LLC \| Partner
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property			17						17
Number of properties acquired \| property			17						17
Equity ownership percentage exchanged			75.00%						75.00%
Number of properties exchanged \| property			6						6
VRS Self Storage, LLC
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property							16						16
Equity Ownership %							45.00%						45.00%
Excess Profit %							54.00%						54.00%
Investment balance							$ (18,465)						$ (18,465)			(17,557)
HF10 Life Storage HHF Wasatch Holdings LLC
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property							16						16
Equity Ownership %							20.00%						20.00%
Excess Profit %							20.00%						20.00%
Investment balance							$ 18,337						$ 18,337			19,295
Other unconsolidated real estate ventures
Schedule of Equity Method Investments [Line Items]
Number of Stores \| property							109						109
Investment balance							$ 286,028						$ 286,028			314,852
Other unconsolidated real estate ventures \| Minimum
Schedule of Equity Method Investments [Line Items]
Equity Ownership %							10.00%						10.00%
Excess Profit %							10.00%						10.00%
Other unconsolidated real estate ventures \| Maximum
Schedule of Equity Method Investments [Line Items]
Equity Ownership %							50.00%						50.00%
Excess Profit %							50.00%						50.00%
Strategic Storage Growth Trust III, Inc. Preferred Stock
Schedule of Equity Method Investments [Line Items]
Investment balance							$ 100,000						$ 100,000			0
Strategic Storage Trust VI, Inc. Preferred Stock
Schedule of Equity Method Investments [Line Items]
Investment balance							150,000						150,000			150,000
Dividend rate, percentage					8.35%
Dividend rate increase, threshold					5 years
Redemption period					3 years
Investment in shares					$ 150,000
SmartStop Self Storage REIT, Inc. Preferred Stock
Schedule of Equity Method Investments [Line Items]
Investment balance						$ 200,000	$ 0						$ 0		$ 200,000	$ 200,000
Investment, preferred dividend rate						7.00%
ESS-NYFL JV LP and ESS-CA TIVS JV LP
Schedule of Equity Method Investments [Line Items]
Equity Ownership %		100.00%
Value of real estate asset acquired		$ 436,797
Assumed debt		$ 258,000
Number of properties acquired \| property		27
Number of joint ventures \| jointVenture		2
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
Life Storage Spacemax LLC
Schedule of Equity Method Investments [Line Items]
Number of properties sold \| property	6
Gain on sale	$ 9,354