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Consolidated Balance Sheets (Parenthetical) (Unaudited) (USD $)
Mar. 31, 2013
Dec. 31, 2012
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 20,082,204 20,190,116
Common stock, shares outstanding 20,005,839 20,155,268
Treasury stock, shares 76,365 34,848
Non-Voting Common Stock
    
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
    
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 24,850 24,850
Preferred stock, shares issued 0 0