Summary of Significant Accounting Policies - Narrative (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 28, 2018	Jan. 29, 2017	Jan. 31, 2016
Property, Plant and Equipment [Line Items]
Inventory write off	$ 16,400	$ 16,100	$ 14,200
Net revenue on unredeemed gift card balances	6,200	4,500	3,600
Transportation costs	53,800	44,900	40,600
Net cash provided by (used in) operating activities	$ 489,337	386,392	297,538
Franchise rights
Property, Plant and Equipment [Line Items]
Estimated useful lives of intangible assets	10 years
Buildings
Property, Plant and Equipment [Line Items]
Estimated useful life of assets	20 years
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Estimated useful life of assets	5 years
Accounting Standards Update 2016-09, Excess Tax Benefit Component
Property, Plant and Equipment [Line Items]
Net cash provided by (used in) operating activities		$ 1,300	$ (1,200)