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Consolidated Balance Sheets (Parenthetical) (USD $)
Apr. 01, 2012
Dec. 31, 2011
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 975,150 975,150
Preferred stock, shares issued 0 0
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 30,000,000 30,000,000
Common stock, shares issued 20,293,907 20,108,635
Common stock, shares outstanding 20,166,842 19,955,401
Treasury stock, shares 127,065 113,234
Non-Voting Common Stock [Member]
    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 10,000,000 10,000,000
Common stock, shares issued 0 0
Series A Preferred Stock [Member]
    
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 24,850 24,850
Preferred stock, shares issued 0 0