Consolidated Statements of Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2011	$ 106,987	$ 84	$ 52,962	$ 52,228	$ (715)	$ 2,428
Increase (Decrease) in Stockholders' Equity
Net income	9,362			9,362
Shares issued under the dividend reinvestment plan ("DRP")	6,564	3	6,561
Stock awards granted and distributed			(580)		580
Stock awards forfeited			6		(6)
Vesting of stock awards	(88)				(88)
Tax effect of stock plans	(10)		(10)
Share based compensation expense	1,030		1,030
Cash dividend declared, 0.46 and 0.69 per share for nine months ended on September 30, 2013 and 2012	(5,858)			(5,858)
Other comprehensive loss, net of deferred income taxes	(1,671)					(1,671)
Balance at Sep. 30, 2012	116,316	87	59,969	55,732	(229)	757
Balance at Dec. 31, 2012	118,672	89	64,208	55,102	(309)	(418)
Increase (Decrease) in Stockholders' Equity
Net income	9,488			9,488
Shares issued under the dividend reinvestment plan ("DRP")	5,611	3	5,608
Stock awards granted and distributed		1	(435)		434
Stock awards forfeited			79		(79)
Vesting of stock awards	(149)				(149)
Tax effect of stock plans	(9)		(9)
Share based compensation expense	977		977
Cash dividend declared, 0.46 and 0.69 per share for nine months ended on September 30, 2013 and 2012	(4,177)			(4,177)
Other comprehensive loss, net of deferred income taxes	(11,406)					(11,406)
Balance at Sep. 30, 2013	$ 119,007	$ 93	$ 70,428	$ 60,413	$ (103)	$ (11,824)