SEGMENTS - Information Regarding Reportable Segments (Detail) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Segment Reporting Information [Line Items]
Net sales		$ 527,428	$ 909,865	$ 473,884	$ 432,965	$ 514,323	$ 812,330	$ 424,010	$ 366,192	$ 2,344,142	$ 2,116,855	$ 1,718,231
Cost of goods sold										1,505,504	1,359,596	1,133,222
Gross profit		$ 178,814	$ 337,057	$ 168,340	$ 154,427	$ 183,490	$ 295,252	$ 148,384	$ 130,133	838,638	757,259	585,009
Selling, general and administrative										628,762	571,990	440,506
Depreciation and amortization										25,392	20,374	13,676
Operating profit (loss)										184,484	164,895	130,827
Operating Segments | Wholesale
Segment Reporting Information [Line Items]
Net sales										1,949,646	1,745,894	1,487,854
Cost of goods sold										1,348,109	1,220,489	1,050,348
Gross profit										601,537	525,405	437,506
Selling, general and administrative										398,476	349,535	313,191
Depreciation and amortization										17,413	13,454	10,014
Operating profit (loss)										185,648	162,416	114,301
Operating Segments | Retail
Segment Reporting Information [Line Items]
Net sales										514,027	499,284	298,008
Cost of goods sold										276,926	267,430	150,505
Gross profit										237,101	231,854	147,503
Selling, general and administrative										230,286	222,455	127,315
Depreciation and amortization										7,979	6,920	3,662
Operating profit (loss)										(1,164)	2,479	16,526
Elimination
Segment Reporting Information [Line Items]
Net sales	[1]									(119,531)	(128,323)	(67,631)
Cost of goods sold	[1]									$ (119,531)	$ (128,323)	$ (67,631)
Gross profit	[1]
Selling, general and administrative	[1]
Depreciation and amortization	[1]
Operating profit (loss)	[1]

[1] Represents intersegment sales to the Company's retail operations.