CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Common Stock Held in Treasury	Total
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
Shares issued in connection with public offering, net	18	128,668				128,686
Effect of exchange rate changes			(16,270)			(16,270)
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards exercised/vested, net	(1)	(838)			1,256	417
Tax benefit from exercise/vesting of equity awards		10,127				10,127
Amortization of share-based compensation		15,576				15,576
Effect of exchange rate changes			(13,584)			(13,584)
Net income attributable to G-III				114,333		114,333
Balance at Jan. 31, 2016	$ 229	$ 353,739	$ (23,689)	$ 560,491	$ (2,643)	$ 888,127