CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Income Statement [Abstract]
Net sales	$ 2,344,142	$ 2,116,855	$ 1,718,231
Cost of goods sold	1,505,504	1,359,596	1,133,222
Gross profit	838,638	757,259	585,009
Selling, general and administrative expenses	628,762	571,990	440,506
Depreciation and amortization	25,392	20,374	13,676
Operating profit	184,484	164,895	130,827
Other income	1,340	11,488
Interest and financing charges, net	(6,691)	(7,942)	(8,599)
Income before income taxes	179,133	168,441	122,228
Income tax expense	64,800	59,450	45,826
Net income	114,333	108,991	76,402
Add: Loss attributable to noncontrolling interest		1,370	958
Income attributable to G-III	$ 114,333	$ 110,361	$ 77,360
Basic:
Net income per common share (in dollars per share)	$ 2.52	$ 2.55	$ 1.90
Weighted average number of shares outstanding (in shares)	45,328	43,298	40,646
Diluted:
Net income per common share (in dollars per share)	$ 2.46	$ 2.48	$ 1.85
Weighted average number of shares outstanding (in shares)	46,512	44,424	41,728
Net income attributable to G-III (in dollars)	$ 114,333	$ 110,361	$ 77,360
Other comprehensive income (loss):
Foreign currency translation adjustments	(13,584)	(16,270)	2,642
Other comprehensive income (loss)	(13,584)	(16,270)	2,642
Comprehensive income	$ 100,749	$ 94,091	$ 80,002