Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income, tax	$ (416)	$ 65
Cash dividends (in dollars per share)	$ 0.24	$ 0.24
Issuance of common stock - non-vested shares (in shares)	3,984	19,012
Issuance of common stock - vested shares (in shares)	5,139	4,536
Repurchase of common stock (in shares)	382	2,130