Consolidated Statements Of Changes In Stockholders’ Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Consolidated Statements Of Changes In Stockholders’ Equity [Abstract]
Cash dividends per common share	$ 0.40	$ 0.38
Issued shares in stock offering	440,000
Issued restricted shares	15,763	19,093
Issued shares in stock option exercises	5,429
Reissued shares in stock option exercises	1,870
Reissued restricted shares, net of forfeitures		2,938