CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Common Stock Held in Treasury	Total
Balance at Jan. 31, 2012	$ 203	$ 160,102	$ 4	$ 201,562	$ (3,899)	$ 357,972
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards exercised/vested, net	3	1,422				1,425
Tax benefit from exercise/vesting of equity awards		1,870				1,870
Amortization of share-based compensation		7,738				7,738
Effect of exchange rate changes			3,519			3,519
Net income attributable to G-III				56,875		56,875
Balance at Jan. 31, 2013	206	171,132	3,523	258,437	(3,899)	429,399
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards exercised/vested, net	3	1,903				1,906
Adjustments related to tax withholding for share-based compensation		(1,062)				(1,062)
Tax benefit from exercise/vesting of equity awards		2,915				2,915
Amortization of share-based compensation		9,953				9,953
Effect of exchange rate changes			2,642			2,642
Net income attributable to G-III				77,360		77,360
Balance at Jan. 31, 2014	209	184,841	6,165	335,797	(3,899)	523,113
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards exercised/vested, net	3	725				(728)
Adjustments related to tax withholding for share-based compensation		(4,316)				(4,316)
Tax benefit from exercise/vesting of equity awards		6,732				6,732
Amortization of share-based compensation		12,224				12,224
Effect of exchange rate changes			(16,270)			(16,270)
Shares issued in connection with public offering, net	18	128,668				128,686
Net income attributable to G-III				110,361		110,361
Balance at Jan. 31, 2015	$ 230	$ 328,874	$ (10,105)	$ 446,158	$ (3,899)	$ 761,258