Segmented Financial Information - Revenues and Long-Lived Assets of Five Geographic Areas (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Feb. 02, 2014	Nov. 03, 2013	Aug. 04, 2013	May 05, 2013	Feb. 03, 2013	Oct. 28, 2012	Jul. 29, 2012	Apr. 29, 2012	Feb. 02, 2014	Feb. 03, 2013	Jan. 29, 2012
Revenues from External Customers and Long-Lived Assets
Net revenue	$ 520,993	$ 379,900	$ 344,513	$ 345,782	$ 485,489	$ 316,537	$ 282,634	$ 285,698	$ 1,591,188	$ 1,370,358	$ 1,000,839
Property and equipment, net	255,603				214,639				255,603	214,639
United States
Revenues from External Customers and Long-Lived Assets
Net revenue									1,052,148	839,908	536,182
Property and equipment, net	97,288				68,115				97,288	68,115
Canada
Revenues from External Customers and Long-Lived Assets
Net revenue									454,209	461,586	425,720
Property and equipment, net	145,416				135,505				145,416	135,505
Outside of North America
Revenues from External Customers and Long-Lived Assets
Net revenue									84,831	68,864	38,937
Property and equipment, net	$ 12,899				$ 11,019				$ 12,899	$ 11,019