CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings	Treasury Stock, Common [Member]	Cumulative Effect, Period of Adoption, Adjustment	Total
Balance at beginning of period at Jan. 31, 2020	$ 264	$ 452,142	$ (18,008)		$ 893,138			$ 1,290,672
Balance at beginning of period, treasury at Jan. 31, 2020						$ (36,864)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards exercised/vested, net		(9,538)				9,835		297
Share-based compensation expense		6,137						6,137
Taxes paid for net share settlements		(324)						(324)
Other comprehensive gain (loss), net			15,914					15,914
Net income (loss) attributable to G-III Apparel Group, Ltd.					23,545			23,545
Balance at end of period, treasury at Jan. 31, 2021						(27,029)
Balance at end of period at Jan. 31, 2021	264	448,417	(2,094)	$ (271)	916,683		$ (271)	1,336,241
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards exercised/vested, net		(5,172)				5,172
Share-based compensation expense		17,424						17,424
Taxes paid for net share settlements		(4,340)						(4,340)
Other comprehensive gain (loss), net			(12,435)					(12,435)
Repurchases of common stock						(17,300)		(17,300)
Net income (loss) attributable to G-III Apparel Group, Ltd.					200,593			200,593
Balance at end of period, treasury at Jan. 31, 2022						(39,157)		(39,157)
Balance at end of period at Jan. 31, 2022	264	456,329	(14,529)		1,117,005			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 gain (loss), 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, treasury at Jan. 31, 2023						$ (55,819)		(55,819)
Balance at end of period at Jan. 31, 2023	$ 264	$ 468,712	$ (11,653)		$ 983,944			$ 1,385,448