Schedule III - Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Self Storage properties:
Balance at beginning of year	$ 5,864,134	$ 5,792,174	$ 6,391,572
Acquisitions and improvements	64,046	81,156	258,560
Write-off of fully depreciated assets and other	0	(1,218)	(767)
Dispositions	(96,162)	(7,978)	(226,379)
Reclassification to assets held for sale	(17,164)	0	(630,812)
Balance at end of year	5,814,854	5,864,134	5,792,174
Accumulated depreciation:
Balance at beginning of year	1,051,638	874,359	772,661
Depreciation expense	178,977	181,326	210,216
Write-off of fully depreciated assets and other	0	(925)	(124)
Dispositions	(14,433)	(3,122)	(27,781)
Reclassification to assets held for sale	(2,645)	0	(80,613)
Balance at end of year	$ 1,213,537	$ 1,051,638	$ 874,359