Selected Quarterly Financial Data - Schedule of Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Feb. 02, 2019	Nov. 03, 2018	Aug. 04, 2018	May 05, 2018	Feb. 03, 2018	Oct. 28, 2017	Jul. 29, 2017	Apr. 29, 2017	Feb. 02, 2019	Feb. 03, 2018	Jan. 28, 2017
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$ 670,891	$ 636,558	$ 640,798	$ 557,406	$ 670,295	$ 592,473	$ 615,326	$ 562,080	$ 2,505,653	$ 2,440,174	$ 2,134,871
Gross profit	262,701	254,511	271,600	212,035	258,673	214,325	205,813	170,256	1,000,847	849,067	679,787
Net income (loss)	$ 36,127	$ 22,411	$ 64,042	$ 28,059	$ 261	$ 13,151	$ (7,862)	$ (3,370)	$ 150,639	$ 2,180	$ 5,401
Weighted-average shares used in computing basic net income (loss) per share	20,901,841	22,082,141	21,925,702	21,545,025	21,418,283	21,221,848	28,398,307	37,609,516	21,613,678	27,053,616	40,691,483
Basic net income (loss) per share	$ 1.73	$ 1.01	$ 2.92	$ 1.30	$ 0.01	$ 0.62	$ (0.28)	$ (0.09)	$ 6.97	$ 0.08	$ 0.13
Weighted-average shares used in computing diluted net income (loss) per share	25,702,791	27,703,319	27,496,561	25,230,228	25,666,174	23,535,617	28,398,307	37,609,516	26,533,225	29,253,208	40,926,840
Diluted net income (loss) per share	$ 1.41	$ 0.81	$ 2.33	$ 1.11	$ 0.01	$ 0.56	$ (0.28)	$ (0.09)	$ 5.68	$ 0.07	$ 0.13