v3.26.1
EARNINGS PER SHARE - Schedule of the Computation of Basic and Diluted Earnings Per Common Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Numerator    
Net income $ 27,681 $ 19,519
Net income attributable to noncontrolling interests (9,901) (6,525)
Net income attributable to National Storage Affiliates Trust 17,780 12,994
Distributions to preferred shareholders (5,153) (5,114)
Distributed and undistributed earnings allocated to participating securities (18) (15)
Net income attributable to common shareholders - basic 12,609 7,865
Net income attributable to common shareholders - diluted $ 12,609 $ 7,865
Denominator    
Weighted average shares outstanding - basic (in shares) 77,093 76,372
Weighted average shares outstanding - diluted (in shares) 77,093 76,372
Earnings per share - basic (in dollars per share) $ 0.16 $ 0.10
Earnings per share - diluted (in dollars per share) $ 0.16 $ 0.10