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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Consolidated Balance Sheets [Abstract]    
Allowance for doubtful accounts $ 1,912 $ 1,085
Preferred stock, par value $ 1 $ 1
Preferred stock, shares authorized 500,000 500,000
Preferred stock, shares issued      
Preferred stock, shares outstanding      
Common stock, par value $ 1 $ 1
Common stock, shares authorized 35,000,000 35,000,000
Common stock, shares issued 8,580,753 8,534,028
Common stock, shares outstanding 8,574,291 8,531,325
Treasury stock, shares 6,462 2,703