CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash dividends:
Cash dividends, Common stock (in dollars per share)	$ 0.52	$ 0.46	$ 0.34
Restricted stock vesting (in shares)	53,908	16,359	15,425
Repurchase of restricted stock (in shares)	15,351	4,576	4,732
Exercise of stock options (in shares)	6,650	0	25,501
Exercise of stock warrant (in shares)	104,101
Repurchase of common stock (in shares)	26,800	77,500