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Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) (USD $)
9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Common Stock, Dividends, Per Share, Declared $ 0.51 $ 0.61
Common stock issued under stock option plan, shares   92
Treasury shares issued under stock option plan, shares 4,007  
Common Stock [Member]
   
Common stock issued under dividend reinvestment plan, shares 36,616 69,652