Selected Quarterly Financial Data - Schedule of Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Feb. 03, 2018	Oct. 28, 2017	Jul. 29, 2017	Apr. 29, 2017	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$ 670,295	$ 592,473	$ 615,326	$ 562,080	$ 586,706	$ 549,328	$ 543,381	$ 455,456	$ 2,440,174	$ 2,134,871	$ 2,109,006
Gross profit	258,673	214,325	205,813	170,256	196,654	175,819	179,839	127,475	849,067	679,787	752,692
Net income (loss)	$ 261	$ 13,151	$ (7,862)	$ (3,370)	$ 9,436	$ 2,517	$ 6,918	$ (13,470)	$ 2,180	$ 5,401	$ 91,103
Weighted-average shares used in computing basic net income (loss) per share	21,418,283	21,221,848	28,398,307	37,609,516	40,803,626	40,730,059	40,646,124	40,588,081	27,053,616	40,691,483	40,190,448
Basic net income (loss) per share	$ 0.01	$ 0.62	$ (0.28)	$ (0.09)	$ 0.23	$ 0.06	$ 0.17	$ (0.33)	$ 0.08	$ 0.13	$ 2.27
Weighted-average shares used in computing diluted net income (loss) per share	25,666,174	23,535,617	28,398,307	37,609,516	41,000,760	40,926,450	40,820,495	40,588,081	29,253,208	40,926,840	42,256,559
Diluted net income (loss) per share	$ 0.01	$ 0.56	$ (0.28)	$ (0.09)	$ 0.23	$ 0.06	$ 0.17	$ (0.33)	$ 0.07	$ 0.13	$ 2.16