Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data	Jul. 31, 2011	Jan. 30, 2011	Aug. 01, 2010
Stockholders' equity:
Preferred stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	10,000	10,000	10,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Common stock, shares authorized	625,000	625,000	625,000
Common stock, shares issued	163,748	162,586	161,487
Treasury stock, shares	51,003	47,094	42,929