Segments - Information regarding reportable segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Oct. 31, 2013		Oct. 31, 2012		Oct. 31, 2013		Oct. 31, 2012
Segment Reporting Information [Line Items]
Net sales	$ 668,702		$ 543,513		$ 1,245,476		$ 1,024,441
Cost of goods sold	441,400		353,306		826,361		690,702
Gross profit	227,302		190,207		419,115		333,739
Selling, general and administrative	125,457		106,287		300,329		242,355
Depreciation and amortization	3,158		2,811		9,523		6,964
Operating profit (loss)	98,687		81,109		109,263		84,420
Operating Segments | Licensed
Segment Reporting Information [Line Items]
Net sales	504,910		402,734		887,871		738,108
Cost of goods sold	348,755		270,308		626,746		518,684
Gross profit	156,155		132,426		261,125		219,424
Selling, general and administrative	76,996		67,385		171,747		149,303
Depreciation and amortization	538		539		1,598		1,542
Operating profit (loss)	78,621		64,502		87,780		68,579
Operating Segments | Non-licensed
Segment Reporting Information [Line Items]
Net sales	124,965		109,450		256,055		205,052
Cost of goods sold	81,677		73,923		169,111		145,524
Gross profit	43,288		35,527		86,944		59,528
Selling, general and administrative	24,515		19,114		63,680		38,790
Depreciation and amortization	1,716		1,579		5,531		3,556
Operating profit (loss)	17,057		14,834		17,733		17,182
Operating Segments | Retail
Segment Reporting Information [Line Items]
Net sales	55,395		44,655		141,742		113,705
Cost of goods sold	27,536		22,401		70,696		58,918
Gross profit	27,859		22,254		71,046		54,787
Selling, general and administrative	23,946		19,788		64,902		54,262
Depreciation and amortization	904		693		2,394		1,866
Operating profit (loss)	3,009		1,773		3,750		(1,341)
Elimination
Segment Reporting Information [Line Items]
Net sales	(16,568)	[1]	(13,326)	[1]	(40,192)	[1]	(32,424)	[1]
Cost of goods sold	(16,568)	[1]	(13,326)	[1]	(40,192)	[1]	(32,424)	[1]
Gross profit		[1]		[1]		[1]		[1]
Selling, general and administrative		[1]		[1]		[1]		[1]
Depreciation and amortization		[1]		[1]		[1]		[1]
Operating profit (loss)		[1]		[1]		[1]		[1]

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