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) income, net of tax [Member]	Total
Balance at Dec. 31, 2012	$ 34,330	$ 42,628	$ 89,555	$ (5,414)	$ 2,886
Net income			9,390			9,390
Dividend reinvestment	0	0
Stock options exercised	18	74
Stock-based compensation	0	367
Other comprehensive income (loss)					(12,164)	(2,774)
Cash dividend on common stock ($0.06 per share in 2014)			0
Balance at Sep. 30, 2013	34,348	43,069	98,945	(5,414)	(9,278)	161,670
Balance at Dec. 31, 2013	34,348	43,280	102,273	(5,414)	(7,289)	167,198
Net income			11,229			11,229
Dividend reinvestment	5	38
Stock options exercised	46	200
Stock-based compensation	184	416
Other comprehensive income (loss)					4,580	15,809
Cash dividend on common stock ($0.06 per share in 2014)			(699)
Balance at Sep. 30, 2014	$ 34,583	$ 43,934	$ 112,803	$ (5,414)	$ (2,709)	$ 183,197