Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Consolidated Statements Of Changes In Shareholders' Equity [Abstract]
Common Stock, Dividends, Per Share, Declared	$ 0.45	$ 0.40
Acquisition of treasury stock, shares		15,521
Treasury shares issued under stock option plan, shares	6,327	188
Treasury shares issued under dividend reinvestment plan, shares	17,267	15,372
Common stock issued under dividend reinvestment plan, shares		25,230
Common stock issued under stock option plans, shares		500