Net Income Per Share - Reconciliations of Basic and Diluted Share Calculations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Earnings Per Share Disclosure
Net income	$ 32,679	$ 35,649	$ 37,862	$ 56,561
Weighted Average Number of Shares Outstanding, Diluted
Weighted average shares outstanding	45,480	45,695	45,529	45,887
Effect of dilutive securities (shares)	441	430	453	445
Weighted average shares outstanding assuming dilution	45,921	46,125	45,982	46,332
Basic Earnings per Share
Basic earnings per share (dollars per share)	$ 0.70	$ 0.76	$ 0.81	$ 1.21
Diluted Earnings per Share
Diluted earnings per share (dollars per share)	$ 0.70	$ 0.76	$ 0.81	$ 1.20
Earnings Per Share, Basic. [Member]
Earnings Per Share Disclosure
Net income	32,679	35,649	37,862	56,561
Undistributed Earnings Allocated to Participating Securities	685	709	770	1,077
Net Income Available to Common Stockholders, Basic	31,994	34,940	37,092	55,484
Earnings Per Share, Diluted
Earnings Per Share Disclosure
Net income	32,679	35,649	37,862	56,561
Undistributed Earnings Allocated to Participating Securities	678	702	762	1,066
Net Income Available to Common Stockholders, Diluted	$ 32,001	$ 34,947	$ 37,100	$ 55,495