Earnings Per Share - Schedule of Weighted-Average Shares Used for Net Income per Share (Detail) - shares	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Earnings Per Share [Abstract]
Weighted-average shares-basic	40,045,850	39,436,255	39,979,898	39,294,274
Effect of dilutive stock-based awards	2,198,060	1,826,374	2,137,317	1,671,354
Weighted-average shares-diluted	42,243,910	41,262,629	42,117,215	40,965,628