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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
Sep. 30, 2013
Dec. 31, 2012
Common stock, par value $ 1 $ 1
Common stock, shares authorized 50,000,000 50,000,000
Common stock, shares issued 20,477,877 20,343,327
Treasury stock, shares 589,849 289,861
Undesignated Par Value
    
Preferred stock      
Preferred stock, shares authorized 1,000,000 1,000,000
Designated Par Value
    
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 25,000 25,000
Preferred stock, shares outstanding 15,471 17,421