Accounts Payable, Accrued Expenses and Other Current Liabilities - Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Jul. 29, 2017	Jan. 28, 2017
Payables And Accruals [Abstract]
Accounts payable	$ 160,452	$ 134,720
Accrued compensation	34,322	26,886
Accrued freight and duty	20,834	27,955
Accrued sales taxes	15,681	14,908
Accrued occupancy	11,053	8,137
Accrued professional fees	8,414	2,082
Accrued catalog costs	7,597	3,874
Other accrued expenses	13,484	8,418
Total accounts payable and accrued expenses	$ 271,837	$ 226,980