Segment Information - Schedule of Financial Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting Information [Line Items]
Revenues:	$ 810,663	$ 511,386	$ 1,610,202	$ 1,014,436
Operating expenses:	451,243	238,047	914,954	477,555
Net operating income:	304,761	273,339	640,589	536,881
Management fees and other income	29,858	22,206	60,006	43,590
General and administrative expense	(39,901)	(34,842)	(83,623)	(69,605)
Depreciation and amortization expense	(194,809)	(79,086)	(391,775)	(157,576)
Interest expense	(137,133)	(86,372)	(270,020)	(166,471)
Non-cash interest expense related to amortization of discount on Life Storage unsecured senior notes	(10,853)	0	(21,558)	0
Interest income	31,226	21,077	54,799	40,515
Equity in earnings and dividend income from unconsolidated real estate entities	17,255	13,254	32,262	23,559
Income tax expense	(9,844)	(5,986)	(16,586)	(10,294)
Operating Segments
Segment Reporting Information [Line Items]
Revenues:	780,805	489,180	1,550,196	970,846
Operating expenses:	216,533	124,119	439,556	250,374
Net operating income:	564,272	365,061	1,110,640	720,472
Self-Storage Operations | Operating Segments
Segment Reporting Information [Line Items]
Revenues:	697,100	440,747	1,385,144	874,709
Operating expenses:	196,902	114,637	401,420	231,803
Net operating income:	500,198	326,110	983,724	642,906
Tenant Reinsurance | Operating Segments
Segment Reporting Information [Line Items]
Revenues:	83,705	48,433	165,052	96,137
Operating expenses:	19,631	9,482	38,136	18,571
Net operating income:	$ 64,074	$ 38,951	$ 126,916	$ 77,566