Property and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 28, 2018	Jan. 29, 2017	Jan. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 817,350	$ 701,824
Accumulated depreciation	(343,708)	(278,325)
Property and equipment, net	473,642	423,499
Computer software	12,400	6,300
Depreciation expense related to property and equipment	108,000	87,000	$ 72,600
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	83,048	78,561
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	39,278	32,174
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	301,449	263,957
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	91,778	81,790
Computer hardware
Property, Plant and Equipment [Line Items]
Property and equipment, gross	61,734	52,107
Computer software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	173,997	135,156
Equipment and vehicles
Property, Plant and Equipment [Line Items]
Property and equipment, gross	14,806	11,966
Work in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 51,260	$ 46,113