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, 2014	$ 209	$ 184,852	$ 6,165	$ 335,786	$ (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	328,885	(10,105)	446,147	(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	353,750	(23,689)	560,480	(2,643)	888,127
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards exercised/vested, net	(2)	(892)			1,153	259
Adjustments related to tax withholding for share-based compensation		(6,956)				(6,956)
Shares issued to LVMH in connection with the DKI Acquisition	26	74,974				75,000
Amortization of share-based compensation		16,901				16,901
Effect of exchange rate changes			(4,033)			(4,033)
Net income attributable to G-III				51,938		51,938
Balance at Jan. 31, 2017	$ 253	$ 437,777	$ (27,722)	$ 612,418	$ (1,490)	$ 1,021,236