Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Feb. 03, 2018	Jan. 28, 2017
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 158,434	$ 129,410
Accumulated depreciation	(57,689)	(36,619)
Property and equipment, excluding construction in progress	100,745	92,791
Construction in progress	17,675	9,531
Property and equipment, net	118,420	102,322
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	85,012	67,966
Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	42,132	35,765
Computer Hardware and Software [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 31,290	$ 25,679