Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Common Stock, Dividends, Per Share, Declared	$ 0.21	$ 0.19
Treasury shares issued under stock option plan, shares	1,126	183
Treasury shares issued under dividend reinvestment plan, shares	7,463
Common Stock [Member]
Common stock issued under dividend reinvestment plan, shares		14,158