CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash dividends:
Cash dividends, Common stock (in dollars per share)	$ 0.46	$ 0.34	$ 0.24
Exercise of stock options (in shares)	0	25,501	2,743
Restricted stock vesting (in shares)	16,359	15,425	21,455
Repurchase of restricted stock (in shares)	4,576	4,732	5,467
Repurchase of common stock (in shares)	77,500