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Consolidated Balance Sheets (Parenthetical) (USD $)
Dec. 31, 2011
Dec. 31, 2010
Common stock, par value $ 1 $ 1
Common stock, shares authorized 50,000,000 50,000,000
Common stock, shares issued 18,082,822 18,082,822
Common stock, shares outstanding 17,849,376 17,866,335
Undesignated Par Value
    
Preferred stock      
Preferred stock, shares authorized 1,000,000 1,000,000
Preferred stock, shares issued      
Preferred stock, shares outstanding      
Designated Par Value
    
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 25,000 25,000
Preferred stock, shares issued 18,921 0