CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 29,016	$ 29,771	$ 79,493	$ 157,139
Other comprehensive (loss) income
Unrealized gain (loss) on derivative contracts	674	(21,234)	(10,345)	5,760
Reclassification of other comprehensive income to interest expense	(2,724)	(7,813)	(8,625)	(26,449)
Other comprehensive (loss) income	(2,050)	(29,047)	(18,970)	(20,689)
Comprehensive income	26,966	724	60,523	136,450
Comprehensive (income) loss attributable to noncontrolling interests	(9,703)	1,668	(20,356)	(52,372)
Comprehensive income attributable to National Storage Affiliates Trust	$ 17,263	$ 2,392	$ 40,167	$ 84,078