Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Common Stock, Dividends, Per Share, Declared	$ 0.61	$ 0.55
Acquisition of treasury stock, shares	30,196
Treasury shares issued under dividend reinvestment plan, shares	24,171
Treasury shares issued under stock option plan, shares	539	4,794
Common stock issued under stock option plans, shares	3,600
Common Stock [Member]
Common stock issued under dividend reinvestment plan, shares	25,230	36,608