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Consolidated Balance Sheets (Parenthetical) (USD $)
Dec. 28, 2011
Dec. 29, 2010
Shareholders' deficit    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, authorized (in shares) 135,000 135,000
Common stock, issued (in shares) 102,668 100,073
Common stock, outstanding (in shares) 95,972 99,036
Treasury stock, at cost (in shares) 6,696 1,037