v3.25.1
NET INCOME PER COMMON SHARE - Reconciliation between basic and diluted net income per share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Apr. 30, 2025
Apr. 30, 2024
NET INCOME PER COMMON SHARE    
Net income (loss) attributable to G-III Apparel Group, Ltd. $ 7,759 $ 5,802
Basic net income (loss) per share:    
Basic common shares 43,748 45,484
Basic net income per share (in dollars per share) $ 0.18 $ 0.13
Diluted net income (loss) per share:    
Basic common shares 43,748 45,484
Dilutive restricted stock unit awards and stock options 1,637 1,250
Diluted common shares 45,385 46,734
Diluted net income per share (in dollars per share) $ 0.17 $ 0.12