Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data	Jul. 30, 2011	Jan. 29, 2011	Jul. 31, 2010
Stockholders' equity:
Common Stock, Par Value	$ 0.01	$ 0.01	$ 0.01
Common Stock, Shares Authorized	400,000	400,000	400,000
Common Stock, Shares Issued	61,693	60,707	59,365
Common Stock, Shares Outstanding	61,188	60,202	58,860