Consolidated Statements Of Changes In Stockholders’ Equity (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 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
Repurchased shares in treasury stock	9,218	3,280
Issued restricted shares	16,283	19,093
Issued shares under Dividend Reinvestment Plan	3,253	5,270
Issued shares in Employee Stock Purchase Plan	3,713	5,166
Issued shares in stock option exercises	7,743	490
Reissued shares in stock option exercises, net of forfeitures	10,597
Reissued restricted shares, net of forfeitures		3,021