CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Common Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss, Net of Tax [Member]	Total
Beginning balance at Dec. 31, 2014	$ 34,591	$ 44,230	$ 116,169	$ (5,414)	$ (6,843)
Net income			9,127			$ 9,127
Dividend reinvestment (49,752 and 15,249 shares issued, respectively)	38	307
Stock options exercised (32,667 shares issued in 2015)	82	380
Stock-based compensation	152	185
Other comprehensive income (loss)					(448)	(448)
Cash dividends on common stock ($0.20 and $0.12 per share, respectively)			(1,405)
Ending balance at Jun. 30, 2015	34,863	45,102	123,891	(5,414)	(7,291)	191,151
Beginning balance at Mar. 31, 2015					(5,727)
Net income						5,118
Other comprehensive income (loss)						(1,564)
Ending balance at Jun. 30, 2015	34,863	45,102	123,891	(5,414)	(7,291)	191,151
Beginning balance at Dec. 31, 2015	34,916	46,239	130,093	(5,414)	(8,576)	197,258
Net income			10,623			10,623
Dividend reinvestment (49,752 and 15,249 shares issued, respectively)	124	1,129
Stock options exercised (32,667 shares issued in 2015)	0	0
Stock-based compensation	105	359
Other comprehensive income (loss)					3,077	3,077
Cash dividends on common stock ($0.20 and $0.12 per share, respectively)			(2,368)
Ending balance at Jun. 30, 2016	35,145	47,727	138,348	(5,414)	(5,499)	210,307
Beginning balance at Mar. 31, 2016					(6,663)
Net income						5,785
Other comprehensive income (loss)						1,164
Ending balance at Jun. 30, 2016	$ 35,145	$ 47,727	$ 138,348	$ (5,414)	$ (5,499)	$ 210,307