Investments in Unconsolidated Real Estate Entities - Additional Information (Details) $ in Thousands	1 Months Ended			12 Months Ended
	May 31, 2023 USD ($)	Jun. 30, 2021 USD ($) store joint_venture	Oct. 31, 2019 USD ($)	Dec. 31, 2023 USD ($) joint_venture store	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Schedule of Equity Method Investments [Line Items]
Investment balance				$ 1,000,548	$ 515,060
Interest sold, number of unconsolidated joint ventures | joint_venture		2
Proceeds from sale of unconsolidated joint ventures		$ 1,888
Gain (loss) on sale		$ 525
Interest purchased, number of unconsolidated joint ventures | joint_venture		2		17
Number of joint venture stores purchased | store				146
Investment				$ 305,921
Number of stores acquired | store				9
Purchase price				$ 27,583
Amortization amount of excess purchase price included in equity earnings				$ 60,253
Amortization period of excess purchase price included in equity earnings				39 years
Management fee revenues				$ 31,755	24,389	$ 17,619
WICNN JV LLC And GFN JV, LLC
Schedule of Equity Method Investments [Line Items]
Gain (loss) on sale		$ 5,739
Number of stores sold | store		17
SmartStop Self Storage REIT Inc Preferred Stock
Schedule of Equity Method Investments [Line Items]
Investment balance			$ 200,000	200,000	200,000
Investment, preferred dividend rate			6.25%
Period after which preferred stock dividend is subject to increase			5 years
Redemption restriction period			5 years
Strategic Storage Trust VI, Inc. Preferred Stock
Schedule of Equity Method Investments [Line Items]
Investment balance				$ 150,000	$ 0
Payments to acquire investments	$ 150,000
Dividend rate, percentage	8.35%
Dividend rate increase threshold	5 years
Redemption period	3 years