Selected Quarterly Financial Data (Unaudited) (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Feb. 01, 2020	Nov. 02, 2019	Aug. 03, 2019	May 04, 2019	Feb. 02, 2019	Nov. 03, 2018	Aug. 04, 2018	May 05, 2018	Feb. 01, 2020	Feb. 02, 2019	Feb. 03, 2018
Selected Quarterly Financial Data (Unaudited)
Net revenues	$ 664,976	$ 677,526	$ 706,514	$ 598,421	$ 670,891	$ 636,558	$ 640,798	$ 557,406	$ 2,647,437	$ 2,505,653
Gross profit	283,073	284,166	294,958	232,814	257,879	250,021	268,344	209,333	1,095,011	985,577	$ 839,298
Net income	$ 68,433	$ 52,463	$ 63,757	$ 35,722	$ 27,250	$ 20,114	$ 62,906	$ 25,461	$ 220,375	$ 135,731	$ (2,599)
Weighted-average shares used in computing basic net income (loss) per share	19,120,709	18,765,769	18,465,876	19,976,858	20,901,841	22,082,141	21,925,702	21,545,025	19,082,303	21,613,678	27,053,616
Basic net income (loss) per share	$ 3.58	$ 2.80	$ 3.45	$ 1.79	$ 1.30	$ 0.91	$ 2.87	$ 1.18	$ 11.55	$ 6.28	$ (0.10)
Weighted-average shares used in computing diluted net income (loss) per share	25,767,864	24,170,172	22,324,112	24,933,987	25,702,791	27,703,319	27,496,561	25,230,228	24,299,034	26,533,225	27,053,616
Diluted net income (loss) per share	$ 2.66	$ 2.17	$ 2.86	$ 1.43	$ 1.06	$ 0.73	$ 2.29	$ 1.01	$ 9.07	$ 5.12	$ (0.10)