Consolidated Statements Of Changes In Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Capital Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2011	$ 9,051	$ 26,512	$ 86,198	$ 7,024	$ (10,535)	$ 118,250
Net Income Loss			3,163			3,163
Total other comprehensive loss				465		465
Dividend declared:
Common stock			(1,106)			(1,106)
Stock options exercised, including related tax effects		2	(24)		98	76
Recognition of stock based compensation expense		30				30
Balance at Mar. 31, 2012	9,051	26,544	88,231	7,489	(10,437)	120,878
Balance at Dec. 31, 2012	9,051	26,693	93,900	7,697	(9,295)	128,046
Net Income Loss			3,216			3,216
Total other comprehensive loss				(2,276)		(2,276)
Dividend declared:
Common stock			(1,196)			(1,196)
Stock options exercised, including related tax effects			(30)		171	141
Recognition of stock based compensation expense		121				121
Restricted stock grants		(95)	11		84
Balance at Mar. 31, 2013	$ 9,051	$ 26,719	$ 95,901	$ 5,421	$ (9,040)	$ 128,052