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		9 Months Ended
	Nov. 01, 2014	Nov. 02, 2013	Nov. 01, 2014	Nov. 02, 2013
Earnings Per Share Disclosure
Net income	$ 29,856	$ 41,189	$ 67,718	$ 97,750
Weighted Average Number of Shares Outstanding, Diluted
Weighted average shares outstanding	44,799	44,967	45,285	45,581
Effect of dilutive securities (shares)	443	476	450	455
Weighted average shares outstanding assuming dilution	45,242	45,443	45,735	46,036
Basic Earnings per Share
Basic earnings per share (dollars per share)	$ 0.65	$ 0.90	$ 1.46	$ 2.10
Diluted Earnings per Share
Diluted earnings per share (dollars per share)	$ 0.65	$ 0.89	$ 1.45	$ 2.08
Earnings Per Share, Basic. [Member]
Earnings Per Share Disclosure
Net income	29,856	41,189	67,718	97,750
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	616	824	1,383	1,892
Net Income Available to Common Stockholders, Basic	29,240	40,365	66,335	95,858
Earnings Per Share, Diluted
Earnings Per Share Disclosure
Net income	29,856	41,189	67,718	97,750
Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted	610	816	1,370	1,874
Net Income Available to Common Stockholders, Diluted	$ 29,246	$ 40,373	$ 66,348	$ 95,876