Consolidated Statements Of Changes In Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Capital Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2013	$ 9,051	$ 25,085	$ 103,907	$ (7,940)	$ (8,724)	$ 121,379
Net income			7,644			7,644
Total other comprehensive income				11,112		11,112
Dividend declared:
Common stock			(2,602)			(2,602)
Purchase of treasury stock					(8)	(8)
Stock options exercised, including related tax effects		$ 19	(8)		312	323
Three-for-two stock split	4,526	(4,526)
Recognition of stock based compensation expense		$ 167				167
Restricted stock grants		(53)			53
Balance at Jun. 30, 2014	$ 13,577	20,692	108,941	3,172	(8,367)	138,015
Balance at Dec. 31, 2014	13,577	20,905	113,149	6,691	(8,035)	146,287
Net income			7,754			7,754
Total other comprehensive income				(3,347)		(3,347)
Dividend declared:
Common stock			(2,952)			(2,952)
Purchase of treasury stock					(8)	(8)
Stock options exercised, including related tax effects		99	(1)		633	731
Recognition of stock based compensation expense		191				191
Restricted stock grants		(64)			64
Balance at Jun. 30, 2015	$ 13,577	$ 21,131	$ 117,950	$ 3,344	$ (7,346)	$ 148,656