Fixed Assets - Summary of Depreciation Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013
Depreciation And Amortization Expenses [Line Items]
Depreciation expense	$ 24,743	$ 22,367	$ 19,381
Cost of goods sold [Member]
Depreciation And Amortization Expenses [Line Items]
Depreciation expense	1,230	1,086	875
Selling, general and administrative expenses [Member]
Depreciation And Amortization Expenses [Line Items]
Depreciation expense	$ 23,513	$ 21,281	$ 18,506