Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2010	$ 4,746	$ 18,354	$ 37,868	$ (1,465)	$ (9,527)	$ 49,976
Shares, Outstanding, Beginning Balance at Dec. 31, 2010	4,257,765
Net income			2,330			2,330
Other comprehensive income				323		323
Cash dividends			(1,784)			(1,784)
Stock-based compensation activity		12				12
Purchase of treasury stock, at cost					(417)	(417)
Purchase of treasury stock, shares	(24,500)
Treasury stock issued for stock option and stock purchase plans		(10)			56	46
Stock Issued During Period, Shares, Treasury Stock Reissued	2,903
Balance at Jun. 30, 2011	4,746	18,356	38,414	(1,142)	(9,888)	50,486
Shares, Outstanding, Ending Balance at Jun. 30, 2011	4,236,168
Balance at Dec. 31, 2011	4,746	18,363	38,900	(2,256)	(10,033)	49,720
Shares, Outstanding, Beginning Balance at Dec. 31, 2011	4,228,218					4,228,218
Net income			1,633			1,633
Other comprehensive income				188		188
Cash dividends			(1,862)			(1,862)
Stock-based compensation activity		11				11
Treasury stock issued for stock option and stock purchase plans		(40)			184	144
Stock Issued During Period, Shares, Treasury Stock Reissued	9,493
Balance at Jun. 30, 2012	$ 4,746	$ 18,334	$ 38,671	$ (2,068)	$ (9,849)	$ 49,834
Shares, Outstanding, Ending Balance at Jun. 30, 2012	4,237,711					4,237,711