Net Income Per Share - Schedule of Weighted-Average Shares Used for Net Income per Share (Detail) - shares	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
Earnings Per Share [Abstract]
Weighted-average shares—basic	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
Effect of dilutive stock-based awards									2,066,111	1,920,719	1,745,066
Weighted-average shares—diluted	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