Acquisitions and Dispositions - Store Acquisitions (Detail) storage_unit in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023 USD ($) store	Mar. 31, 2023 USD ($) store	Jun. 30, 2022 USD ($) store	Mar. 31, 2022 USD ($) store	Jun. 30, 2023 USD ($) store	Jun. 30, 2022 USD ($) store	Jun. 01, 2022 storage_unit
Business Acquisition [Line Items]
Number of Stores | store	3	1	15	14	4	29
Cash Paid	$ 32,888	$ 13,111	$ 220,933	$ 185,910	$ 45,999	$ 406,843
Finance Lease Liability	0	0	6,823	0	0	6,823
Investments in Real Estate Ventures	0	0	0	747	0	747
Net Liabilities/ (Assets) Assumed	26	6	811	274	32	1,085
Value of Equity Issued	0	0	0	40,965	0	40,965
Total	$ 32,914	$ 13,117	$ 228,567	$ 227,896	$ 46,031	$ 456,463
Bargold
Business Acquisition [Line Items]
Number of storage units | storage_unit							17
Occupancy rate							97.00%