Segments - Information regarding reportable segments (Details) - USD ($) $ in Thousands		3 Months Ended
		Apr. 30, 2016	Apr. 30, 2015
Segment Reporting Information [Line Items]
Net sales		$ 457,403	$ 432,965
Cost of goods sold		291,734	278,538
Gross profit		165,669	154,427
Selling, general and administrative		153,105	137,034
Depreciation and amortization		7,193	5,687
Operating profit (loss)		5,371	11,706
Operating Segments | Wholesale
Segment Reporting Information [Line Items]
Net sales		382,371	352,485
Cost of goods sold		257,995	245,409
Gross profit		124,376	107,076
Selling, general and administrative		96,938	84,594
Depreciation and amortization		5,000	3,931
Operating profit (loss)		22,438	18,551
Operating Segments | Retail
Segment Reporting Information [Line Items]
Net sales		94,992	102,529
Cost of goods sold		53,699	55,178
Gross profit		41,293	47,351
Selling, general and administrative		56,167	52,440
Depreciation and amortization		2,193	1,756
Operating profit (loss)		(17,067)	(6,845)
Elimination
Segment Reporting Information [Line Items]
Net sales	[1]	(19,960)	(22,049)
Cost of goods sold	[1]	$ (19,960)	$ (22,049)
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.