Segmented Financial Information - Revenues and Long-Lived Assets of Five Geographic Areas (Detail) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 28, 2018 USD ($)	Oct. 29, 2017 USD ($)	Jul. 30, 2017 USD ($)	Apr. 30, 2017 USD ($)	Jan. 29, 2017 USD ($)	Oct. 30, 2016 USD ($)	Jul. 31, 2016 USD ($)	May 01, 2016 USD ($)	Jan. 28, 2018 USD ($) segment	Jan. 29, 2017 USD ($)	Jan. 31, 2016 USD ($)
Revenues from External Customers and Long-Lived Assets
Number of geographic areas | segment									5
Net revenue	$ 928,802	$ 619,018	$ 581,054	$ 520,307	$ 789,940	$ 544,416	$ 514,520	$ 495,516	$ 2,649,181	$ 2,344,392	$ 2,060,523
Property and equipment, net	473,642				423,499				473,642	423,499
United States
Revenues from External Customers and Long-Lived Assets
Net revenue									1,911,763	1,726,076	1,508,841
Property and equipment, net	161,699				170,745				161,699	170,745
Canada
Revenues from External Customers and Long-Lived Assets
Net revenue									491,779	447,167	416,520
Property and equipment, net	271,441				217,035				271,441	217,035
Outside of North America
Revenues from External Customers and Long-Lived Assets
Net revenue									245,639	171,149	$ 135,162
Property and equipment, net	$ 40,502				$ 35,719				$ 40,502	$ 35,719