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Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - $ / shares
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Consolidated Statements Of Changes In Shareholders' Equity [Abstract]    
Common stock dividends, per share $ 0.265 $ 0.245
Purchase of Treasury Stock, shares 6,252  
Stock options exercised, shares 7,049 13,052