Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Apr. 28, 2012
Jan. 28, 2012
Apr. 30, 2011
Condensed Consolidated Balance Sheets      
Common stock, voting, par value (in dollars per share) $ 0.001 $ 0.001 $ 0.001
Common stock, voting, shares authorized 300,000 300,000 300,000
Common stock, voting, shares issued and outstanding 62,392 62,053 61,939
Treasury stock at cost, shares 1,000 1,000 1,000