Segments - Information regarding reportable segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2015		Apr. 30, 2014
Segment Reporting Information [Line Items]
Net sales	$ 432,965		$ 366,192
Cost of goods sold	278,538		236,058
Gross profit	154,427		130,134
Selling, general and administrative	137,034		122,441
Depreciation and amortization	5,687		4,227
Operating profit (loss)	11,706		3,466
Operating Segments | Wholesale
Segment Reporting Information [Line Items]
Net sales	352,485		285,069
Cost of goods sold	245,409		199,295
Gross profit	107,076		85,774
Selling, general and administrative	84,594		70,698
Depreciation and amortization	3,931		2,832
Operating profit (loss)	18,551		12,244
Operating Segments | Retail
Segment Reporting Information [Line Items]
Net sales	102,529		95,028
Cost of goods sold	55,178		50,668
Gross profit	47,351		44,360
Selling, general and administrative	52,440		51,743
Depreciation and amortization	1,756		1,395
Operating profit (loss)	(6,845)		(8,778)
Elimination
Segment Reporting Information [Line Items]
Net sales	(22,049)	[1]	(13,905)	[1]
Cost of goods sold	(22,049)	[1]	(13,905)	[1]
Gross profit		[1]		[1]
Selling, general and administrative		[1]		[1]
Depreciation and amortization		[1]		[1]
Operating profit (loss)		[1]		[1]

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