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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Securities, fair value $ 520,567 $ 562,815 $ 575,404
Common stock, par value $ 1.00 $ 1.00 $ 1.00
Common stock, shares authorized 20,000,000 20,000,000 20,000,000
Common stock, shares issued 15,255,864 15,242,308 15,153,991
Common stock, shares outstanding 15,255,864 15,242,308 15,153,991
Accumulated other comprehensive income, tax $ 2,275 $ 3,400 $ 3,746
Senior preferred stock [Member]
      
Preferred stock, par value $ 1.00 $ 1.00 $ 1.00
Preferred stock, shares authorized 10,000,000 10,000,000 10,000,000
Preferred stock, shares issued         
Cumulative preferred stock [Member]
      
Preferred stock, par value $ 5.00 $ 5.00 $ 5.00
Preferred stock, shares authorized 900,000 900,000 900,000
Preferred stock, shares issued