Business Combination - Summary of Purchase Price Allocation Based on Estimated Fair Value of Acquired Assets and Assumed Liabilities, Prior to and After Purchase Price Allocation Adjustments (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jul. 29, 2017	Jan. 28, 2017
Business Acquisition [Line Items]
Goodwill	$ 175,592	$ 173,603
Design Investors WW Acquisition Company, LLC [Member]
Business Acquisition [Line Items]
Tangible assets acquired and liabilities assumed	16,699	18,615
Trademarks	52,100	52,100
Goodwill	51,145	49,229
Total	119,944	$ 119,944
Purchase Price Allocation Adjustments, Tangible assets acquired and liabilities assumed	(1,916)
Purchase Price Allocation Adjustments, Goodwill	$ 1,916