CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Statement of Stockholders' Equity [Abstract]
Cash dividends, common stock (in dollars per share)	$ 0.45	$ 0.45
Exercise of stock options (in shares)	143,092	41,351
Dividend reinvestment plan shares issued from reserve (in shares)	149,758	17,972
Restricted stock vesting (in shares)	4,549	6,205
Common stock issued (in shares)	9,516,097