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Consolidated Balance Sheets (Parenthetical) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Preferred stock, shares authorized 250,000 250,000
Common stock, par value $ 2.5 $ 2.5
Common stock, shares authorized 20,000,000 20,000,000
Common stock, shares issued 7,425,472 7,425,472
Preferred Stock Series 2009 [Member]
   
Preferred stock, par value $ 1 $ 1
Preferred stock, shares issued 3,710 3,710
Preferred stock, dividend rate, percentage 8.00% 8.00%
Preferred Stock Series 2011 [Member]
   
Preferred stock, par value $ 1  
Preferred stock, shares issued 12,000  
Preferred stock, dividend rate, percentage 8.00%