Segment Information - Schedule of Financial Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Revenues:	$ 799,539	$ 503,050
Operating expenses:	463,711	239,508
Net operating income:	335,828	263,542
Management fees and other income	30,148	21,384
General and administrative expense	(43,722)	(34,763)
Depreciation and amortization expense	(196,966)	(78,490)
Interest expense	(132,887)	(80,099)
Non-cash interest expense related to amortization of discount on Life Storage unsecured senior notes	(10,705)	0
Interest income	23,573	19,438
Equity in earnings and dividend income from unconsolidated real estate entities	15,007	10,305
Income tax expense	(6,742)	(4,308)
Net income	224,074	208,878
Operating Segments
Segment Reporting Information [Line Items]
Revenues:	769,391	481,666
Operating expenses:	223,023	126,255
Net operating income:	546,368	355,411
Self-Storage Operations | Operating Segments
Segment Reporting Information [Line Items]
Revenues:	688,044	433,962
Operating expenses:	204,518	117,166
Net operating income:	483,526	316,796
Tenant Reinsurance | Operating Segments
Segment Reporting Information [Line Items]
Revenues:	81,347	47,704
Operating expenses:	18,505	9,089
Net operating income:	$ 62,842	$ 38,615