Selected Quarterly Financial Data - Schedule of Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	May. 02, 2015	Jan. 31, 2015	Nov. 01, 2014	Aug. 02, 2014	May. 03, 2014	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$ 647,208	$ 532,411	$ 506,942	$ 422,445	$ 582,727	$ 484,675	$ 433,766	$ 366,254	$ 2,109,006	$ 1,867,422	$ 1,550,961
Gross profit	224,261	190,750	194,263	143,418	218,143	180,373	167,909	124,349	752,692	690,774	556,880
Net income	$ 33,302	$ 20,710	$ 29,935	$ 7,156	$ 42,525	$ 19,429	$ 27,253	$ 1,795	$ 91,103	$ 91,002	$ 18,195
Weighted-average shares used in computing basic net income per share	40,522,242	40,282,734	40,045,850	39,913,946	39,734,145	39,507,272	39,436,255	39,152,923	40,190,448	39,457,491	38,671,564
Basic net income per share	$ 0.82	$ 0.51	$ 0.75	$ 0.18	$ 1.07	$ 0.49	$ 0.69	$ 0.05	$ 2.27	$ 2.31	$ 0.47
Weighted-average shares used in computing diluted net income per share	42,225,070	42,413,657	42,243,910	41,959,718	41,777,509	41,392,831	41,262,629	40,787,726	42,256,559	41,378,210	40,416,630
Diluted net income per share	$ 0.79	$ 0.49	$ 0.71	$ 0.17	$ 1.02	$ 0.47	$ 0.66	$ 0.04	$ 2.16	$ 2.20	$ 0.45