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 (Loss) [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2010	$ 9,051	$ 26,165	$ 80,379	$ 284	$ (12,271)	$ 103,608
Net income			5,642			5,642
Total other comprehensive income				2,906		2,906
Dividend declared:
Common stock			(2,074)			(2,074)
Purchase of treasury stock (4,220 shares)					(119)	(119)
Stock options exercised, including related tax effects		146	(568)		1,340	918
Recognition of stock based compensation expense		49				49
Balance at Jun. 30, 2011	9,051	26,360	83,379	3,190	(11,050)	110,930
Balance at Dec. 31, 2011	9,051	26,512	86,198	7,024	(10,535)	118,250
Net income			6,268			6,268
Total other comprehensive income				1,571		1,571
Dividend declared:
Common stock			(2,234)			(2,234)
Stock options exercised, including related tax effects		22	(140)		688	570
Recognition of stock based compensation expense		109	20			129
Restricted stock grants		(49)	8		41
Balance at Jun. 30, 2012	$ 9,051	$ 26,594	$ 90,120	$ 8,595	$ (9,806)	$ 124,554