CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Surplus [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Total
Balance at Dec. 31, 2015					$ (379)
Net income						$ 5,489
Other comprehensive income (loss)					(1,635)	(1,635)
Balance at Mar. 31, 2016					(2,014)
Balance at Dec. 31, 2016	$ 14,717	$ 238,708	$ (8,988)	$ 81,304	(1,531)	$ 324,210
Shares outstanding at Dec. 31, 2016	17,257,995					17,257,995
Net income				7,982		$ 7,982
Other comprehensive income (loss)					909	909
Restricted stock units issued	$ 51	(51)
Restricted stock units issued, shares	61,087
Restricted stock awards forfeitures	$ (1)	1
Restricted stock awards forfeitures, shares	(200)
Restricted stock repurchased on vesting to pay taxes	$ (37)	(1,286)				(1,323)
Restricted stock repurchased on vesting to pay taxes, shares	(43,904)
Amortization of restricted awards/units		814				814
Cash dividends declared on common stock				(863)		(863)
Common stock option expense		5				5
Common stock options exercised and related tax benefits	$ 20	164				$ 184
Common stock options exercised and related tax benefits, shares	15,176					23,447
Common stock options exercised, shares used for exercise	8,271
Sales of shares (Dividend Reinvestment Program)	$ 236	8,603				$ 8,839
Sales of shares (Dividend Reinvestment Program), shares	283,786
Issuance of shares for Employee Stock Purchase Plan	$ 5	166				171
Issuance of shares for Employee Stock Purchase Plan, shares	5,334
Balance at Mar. 31, 2017	$ 14,991	$ 247,124	$ (8,988)	$ 88,423	$ (622)	$ 340,928
Shares outstanding at Mar. 31, 2017	17,579,274					17,579,274