Stock Repurchase Program (Details) (USD $)	6 Months Ended			3 Months Ended		6 Months Ended
	Jul. 28, 2012	Jan. 28, 2012	Jul. 28, 2012 Under August 2004 Authorization [Member]	Jul. 28, 2012 Under November 2009 Authorization [Member]	Jul. 30, 2011 Under November 2009 Authorization [Member]	Jul. 28, 2012 Under November 2009 Authorization [Member]	Jul. 30, 2011 Under November 2009 Authorization [Member]
Equity, Class of Treasury Stock [Line Items]
Amount authorized under stock repurchase program	$ 250,000,000
Shares of common stock repurchased during the period (in shares)				176,443	240,405	493,403	972,952
Shares acquired from holders of restricted stock unit awards to satisfy tax withholding requirements (in shares)				8,891		68,386	36,352
Value of common stock repurchased during current period				10,200,000	9,400,000	27,000,000	33,100,000
Value of tax withholding payments related to shares acquired from holders of restricted stock unit awards				500,000		3,700,000	1,100,000
Value of shares of common stock remaining available for repurchase under the program	121,500,000
Shares of common stock repurchased to date (in shares)	11,613,443	11,120,040	7,761,813
Value of common stock repurchased to date	$ 300,437,000	$ 273,416,000	$ 166,900,000