CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Income Statement [Abstract]
Net sales	$ 2,766,538	$ 2,055,146	$ 3,160,464
Cost of goods sold	1,778,349	1,310,704	2,042,524
Gross profit	988,189	744,442	1,117,940
Selling, general and administrative expenses	648,015	605,102	832,180
Depreciation and amortization	27,626	38,625	38,735
Asset impairments, net of loss (gain) on lease terminations	1,455	17,873	19,371
Operating profit (loss)	311,093	82,842	227,654
Other income (loss)	9,549	3,238	(1,149)
Interest and financing charges, net	(49,666)	(50,354)	(44,407)
Income (loss) before income taxes	270,976	35,726	182,098
Income tax expense (benefit)	70,875	12,203	38,261
Net income (loss)	200,101	23,523	143,837
Less: Income attributable to noncontrolling interests	(492)	(22)
Net income (loss) attributable to G-III Apparel Group, Ltd.	$ 200,593	$ 23,545	$ 143,837
Basic:
Net income (loss) per common share	$ 4.14	$ 0.49	$ 2.98
Weighted average number of shares outstanding (in shares)	48,426	48,242	48,209
Diluted:
Net income per common share	$ 4.05	$ 0.48	$ 2.94
Weighted average number of shares outstanding (in shares)	49,516	48,781	48,895
Other comprehensive income:
Foreign currency translation adjustments	$ (12,456)	$ (15,885)	$ (2,814)
Other comprehensive loss	(12,456)	(15,885)	(2,814)
Comprehensive income	187,645	7,638	141,023
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest [Abstract]
Net loss	(492)	(22)
Foreign currency translation adjustments	21	(29)
Comprehensive income attributable to noncontrolling interests	(471)	(51)
Comprehensive income attributable to G-III Apparel Group, Ltd	$ 187,174	$ 7,587	$ 141,023