v3.24.1.1.u2
EARNINGS PER SHARE (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Earnings Per Share [Abstract]      
Net income $ 102,539 $ 96,574 $ 67,319
Income attributable to redeemable noncontrolling interest (891) (139) (934)
Net income attributable to CSW Industrials, Inc. $ 101,648 $ 96,435 $ 66,385
Weighted average shares:      
Common stock (in shares) 15,427 15,401 15,646
Participating securities (in shares) 106 108 109
Denominator for basic earnings per common share (in shares) 15,533 15,509 15,755
Potentially dilutive securities (in shares) 48 37 52
Denominator for diluted earnings per common share (in shares) 15,581 15,546 15,807
Basic earnings per common share: (in USD per share) $ 6.54 $ 6.22 $ 4.21
Diluted earnings per common share: (in USD per share) $ 6.52 $ 6.20 $ 4.20