Net Income Per Share - Schedule of Weighted-Average Shares Used for Net Income per Share (Detail) - shares	3 Months Ended								12 Months Ended
	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	May 02, 2015	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Earnings Per Share [Abstract]
Weighted-average shares—basic	40,803,626	40,730,059	40,646,124	40,588,081	40,522,242	40,282,734	40,045,850	39,913,946	40,691,483	40,190,448	39,457,491
Effect of dilutive stock-based awards									235,357	2,066,111	1,920,719
Weighted-average shares—diluted	41,000,760	40,926,450	40,820,495	40,588,081	42,225,070	42,413,657	42,243,910	41,959,718	40,926,840	42,256,559	41,378,210