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
Beginning balance at Dec. 31, 2020	$ 5,151	$ 25,011	$ 45,096	$ 3,518	$ (2,179)	$ 76,597
Beginning balance, shares at Dec. 31, 2020	5,025,441
Net income			6,604			6,604
Other comprehensive loss				(6,883)		(6,883)
Cash dividends			(4,402)			(4,402)
Stock-based compensation		158				$ 158
Forfeiture of restricted stock, Shares						(200)
Purchase of treasury stock					(861)	$ (861)
Purchase of treasury stock, shares	(50,682)					(50,482)
Treasury stock issued for stock plans		(161)			238	$ 77
Treasury stock issued for stock plans, shares	13,783
Ending balance at Dec. 31, 2021	$ 5,151	25,008	47,298	(3,365)	(2,802)	$ 71,290
Ending balance, shares at Dec. 31, 2021	4,988,542					4,988,542
Net income			8,320			$ 8,320
Other comprehensive loss				(38,502)		(38,502)
Cash dividends			(4,401)			(4,401)
Stock-based compensation		176				$ 176
Forfeiture of restricted stock, Shares						(825)
Purchase of treasury stock					(3)	$ (3)
Purchase of treasury stock, shares	(995)					(170)
Treasury stock issued for stock plans		(198)			267	$ 69
Treasury stock issued for stock plans, shares	15,512
Ending balance at Dec. 31, 2022	$ 5,151	$ 24,986	$ 51,217	$ (41,867)	$ (2,538)	$ 36,949
Ending balance, shares at Dec. 31, 2022	5,003,059					5,003,059