Significant Accounting Policies - Summary of Allowance for Sales Returns, Net of Cost of Goods Sold (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Balance at beginning of fiscal year	$ 12,688	$ 10,235	$ 12,142
Provision for sales returns	106,508	104,028	87,217
Actual sales returns	(109,642)	(101,575)	(89,124)
Balance at end of fiscal year	10,077	12,688	$ 10,235
Waterworks [Member]
Balance at beginning of fiscal year	$ 523
Balance at end of fiscal year		$ 523