CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 116,274	$ 183,270	$ 236,988
Other comprehensive income (loss)
Unrealized (loss) gain on derivative contracts	(9,133)	27,908	10,893
Realized loss on derivative contracts	0	0	(1,643)
Reclassification of other comprehensive (income) loss to interest expense	(10,642)	(31,779)	(35,605)
Other comprehensive (loss) income	(19,775)	(3,871)	(26,355)
Comprehensive income	96,499	179,399	210,633
Comprehensive income attributable to noncontrolling interests	(33,899)	(69,093)	(71,649)
Comprehensive income attributable to National Storage Affiliates Trust	$ 62,600	$ 110,306	$ 138,984