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Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical)
9 Months Ended
Sep. 30, 2015
$ / shares
shares
Sep. 30, 2014
$ / shares
shares
Consolidated Statements Of Changes In Shareholders' Equity [Abstract]    
Common stock dividends, per share | $ / shares $ 0.75 $ 0.67
Purchase of treasury stock, shares 656 327
Stock options exercised, shares 43,221 24,456
Restricted stock grants, shares 6,040 2,878