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, 2016	$ 191	$ 329,427	$ 91,594	$ (161)	$ (13,064)	$ 407,987
Increase (Decrease) in Stockholders' Equity
Net income			9,171			9,171
Shares issued under the dividend reinvestment plan		222				222
Shares issued for trust preferred securities conversions (529,292 shares)	5	14,944				14,949
Stock awards granted and distributed	1	(374)		373
Stock awards forfeited		13		(13)
Repurchase of surrendered stock from vesting of restricted stock awards				(221)		(221)
Share based compensation expense		610				610
Cash dividend declared, $0.23 per share			(4,541)			(4,541)
Other comprehensive income, net of deferred income taxes					1,281	1,281
Balance at Mar. 31, 2017	197	344,842	96,224	(22)	(11,783)	429,458
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, net of deferred income taxes					(3,970)	(3,970)
Balance at Mar. 31, 2018	$ 198	$ 348,420	$ 104,050	$ (436)	$ (18,909)	$ 433,323