Consolidated Statements of Stockholders Equity (unaudited) - USD ($) $ in Thousands	Common Stock	Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss	Total
Balance at Dec. 31, 2017	$ 197	$ 347,691	$ 96,547	$ (296)	$ (14,939)	$ 429,200
Increase (Decrease) in Stockholders' Equity
Net income			12,073			12,073
Shares issued under the dividend reinvestment plan		232				232
Stock awards granted and distributed	1	(307)		306
Stock awards forfeited		20		(20)
Repurchase of surrendered stock from vesting of restricted stock awards				(426)		(426)
Share based compensation expense		784				784
Cash dividend declared, $0.23 per share			(4,570)			(4,570)
Other comprehensive income (loss), net of deferred income taxes					(3,970)	(3,970)
Balance at Mar. 31, 2018	198	348,420	104,050	(436)	(18,909)	433,323
Balance at Dec. 31, 2018	198	352,093	117,432	(781)	(15,112)	453,830
Increase (Decrease) in Stockholders' Equity
Net income			12,927			12,927
Shares issued under the dividend reinvestment plan		198				198
Stock awards granted and distributed	1	(791)		790
Repurchase of surrendered stock from vesting of restricted stock awards				(795)		(795)
Share based compensation expense		954				954
Cash dividend declared, $0.23 per share			(4,594)			(4,594)
Other comprehensive income (loss), net of deferred income taxes					2,483	2,483
Balance at Mar. 31, 2019	$ 199	$ 352,454	$ 125,765	$ (786)	$ (12,629)	$ 465,003