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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
Dec. 24, 2011
Sep. 24, 2011
Preferred stock, par value $ 0.05 $ 0.05
Preferred stock, shares authorized 10,000,000 10,000,000
Preferred stock, shares issued 0 0
Class A Common Stock [Member]
    
Common stock, par value $ 0.05 $ 0.05
Common stock, shares authorized 150,000,000 150,000,000
Common stock, shares issued 12,924,135 12,939,533
Common stock, shares outstanding 12,924,135 12,939,533
Class B Common Stock [Member]
    
Common stock, par value $ 0.05 $ 0.05
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 11,348,941 11,489,726
Common stock, shares outstanding 11,348,941 11,489,726