CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Common Stock Held In Treasury	Total
Balance at beginning of period at Jan. 31, 2022	$ 264	$ 456,329	$ (14,529)	$ 1,117,005	$ (39,157)	$ 1,519,912
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards exercised/vested, net		(10,287)			10,287
Share-based compensation expense		32,475				32,475
Taxes paid for net share settlements		(9,805)				(9,805)
Other comprehensive income, net			2,876			2,876
Repurchases of common stock					(26,949)	(26,949)
Net income (loss) attributable to G-III Apparel Group, Ltd.				(133,061)		(133,061)
Balance at end of period at Jan. 31, 2023	264	468,712	(11,653)	983,944	(55,819)	1,385,448
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards exercised/vested, net		(16,169)			16,169
Share-based compensation expense		17,164				17,164
Taxes paid for net share settlements		(10,866)				(10,866)
Other comprehensive income, net			8,446			8,446
Repurchases of common stock					(26,100)	(26,100)
Net income (loss) attributable to G-III Apparel Group, Ltd.				176,168		176,168
Balance at end of period, treasury at Jan. 31, 2024						(65,750)
Balance at end of period at Jan. 31, 2024	264	458,841	(3,207)	1,160,112	(65,750)	1,550,260
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards exercised/vested, net		(9,725)			9,725
Share-based compensation expense		28,894				28,894
Taxes paid for net share settlements		(7,576)				(7,576)
Other comprehensive income, net			(22,312)			(22,312)
Repurchases of common stock					(59,973)	(59,973)
Excise tax on stock repurchases					(636)	(636)
Reduction of noncontrolling interest		(2,742)				(2,742)
Net income (loss) attributable to G-III Apparel Group, Ltd.				193,566		193,566
Balance at end of period, treasury at Jan. 31, 2025						(116,634)
Balance at end of period at Jan. 31, 2025	$ 264	$ 467,692	$ (25,519)	$ 1,353,678	$ (116,634)	$ 1,679,481