Quarterly report pursuant to Section 13 or 15(d)

EARNINGS PER SHARE - Basic and Diluted Earnings per Share (Details)

v3.8.0.1
EARNINGS PER SHARE - Basic and Diluted Earnings per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Numerator    
Net income $ 11,973 $ 7,181
Net income attributable to noncontrolling interests (1,513) (6,626)
Net income attributable to National Storage Affiliates Trust 10,460 555
Distributions to preferred shareholders (2,588) 0
Distributed and undistributed earnings allocated to participating securities (7) (6)
Net income attributable to common shareholders - basic 7,865 549
Effect of assumed conversion of dilutive securities 1,370 0
Net income attributable to common shareholders - diluted $ 9,235 $ 549
Denominator    
Weighted average shares outstanding - basic (in shares) 50,299 43,401
Effect of dilutive securities:    
Weighted average shares outstanding - diluted (in shares) 99,935 43,401
Earnings (loss) per share - basic (in dollars per share) $ 0.16 $ 0.01
Earnings (loss) per share - diluted (in dollars per share) $ 0.09 $ 0.01
OP units | NSA OP, LP    
Effect of dilutive securities:    
Effect of dilutive securities (in shares) 29,135 0
OP units | DownREIT Partnership    
Effect of dilutive securities:    
Effect of dilutive securities (in shares) 1,835 0
LTIP units | NSA OP, LP    
Effect of dilutive securities:    
Effect of dilutive securities (in shares) 321 0
Subordinated performance units | NSA OP, LP And DownREIT Partnership    
Effect of dilutive securities:    
Effect of dilutive securities (in shares) 18,345 0