Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2013	$ 4,746	$ 18,370	$ 39,118	$ (1,659)	$ (10,591)	$ 49,984
Balance, Shares at Dec. 31, 2013	4,196,266
Net income			2,066			2,066
Other comprehensive income				934		934
Cash dividends at $0.44 per share			(1,847)			(1,847)
Stock-based compensation		23				23
Purchase of treasury stock					(173)	(173)
Purchase of treasury stock, shares	(9,656)
Treasury stock issued for stock option and stock purchase plans		(8)			67	59
Treasury stock issued for stock option and stock purchase plans, shares	3,497
Balance at Jun. 30, 2014	$ 4,746	18,385	39,337	(725)	(10,697)	51,046
Balance, Shares at Jun. 30, 2014	4,190,107
Balance at Dec. 31, 2014	$ 4,746	18,409	39,644	(2,197)	(10,746)	$ 49,856
Balance, Shares at Dec. 31, 2014	4,187,441					4,187,441
Net income			1,925			$ 1,925
Other comprehensive income				80		80
Cash dividends at $0.44 per share			(1,843)			(1,843)
Stock-based compensation		27				27
Treasury stock issued for stock option and stock purchase plans		(6)			63	57
Treasury stock issued for stock option and stock purchase plans, shares	3,242
Balance at Jun. 30, 2015	$ 4,746	$ 18,430	$ 39,726	$ (2,117)	$ (10,683)	$ 50,102
Balance, Shares at Jun. 30, 2015	4,190,683					4,190,683