Segments - Information regarding reportable segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Segment Reporting Information [Line Items]
Net sales	$ 1,128,403	$ 1,072,982	$ 2,405,847	$ 2,309,423
Cost of goods sold	729,384	690,882	1,538,995	1,461,252
Gross profit	399,019	382,100	866,852	848,171
Selling, general and administrative expenses	246,580	232,052	644,887	632,983
Depreciation and amortization	9,701	10,033	28,963	28,868
Gain on lease terminations	(124)		(2,346)
Operating profit (loss)	142,862	140,015	195,348	186,320
Operating Segments | Wholesale operations
Segment Reporting Information [Line Items]
Net sales	1,067,858	1,005,358	2,227,404	2,077,628
Cost of goods sold	713,063	677,011	1,480,678	1,381,342
Gross profit	354,795	328,347	746,726	696,286
Selling, general and administrative expenses	190,166	166,423	478,964	439,014
Depreciation and amortization	7,748	7,709	23,033	22,192
Operating profit (loss)	156,881	154,215	244,729	235,080
Operating Segments | Retail
Segment Reporting Information [Line Items]
Net sales	89,671	110,934	255,282	322,115
Cost of goods sold	45,447	57,181	135,156	170,230
Gross profit	44,224	53,753	120,126	151,885
Selling, general and administrative expenses	56,414	65,629	165,923	193,969
Depreciation and amortization	1,953	2,324	5,930	6,676
Gain on lease terminations	(124)		(2,346)
Operating profit (loss)	(14,019)	(14,200)	(49,381)	(48,760)
Elimination
Segment Reporting Information [Line Items]
Net sales	(29,126)	(43,310)	(76,839)	(90,320)
Cost of goods sold	$ (29,126)	$ (43,310)	$ (76,839)	$ (90,320)