Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock Member	Additional Paid In Capital Member	Retained Earnings Member	Accumulated Other Comprehensive Income Member	Treasury Stock Member
Balance, shares at Dec. 31, 2021		3,520,485
Balance, Beg at Dec. 31, 2021	$ 103,726	$ 39	$ 3,794	$ 109,974	$ 891	$ (10,972)
Net earnings	5,880			5,880
Other Comprehensive Income (Loss), Net Of Tax	(46,566)				(46,566)
Cash dividends paid	2,791			2,791
Treasury Stock, acquired	(460)					(460)
Treasury Stock, acquired shares		(15,280)
Sale of treasury stock	4		3			1
Treasury shares sold		150
Balance, End at Sep. 30, 2022	59,793	$ 39	3,797	113,063	(45,675)	(11,431)
Balance, shares at Sep. 30, 2022		3,505,355
Balance, shares at Jun. 30, 2022		3,509,940
Balance, Beg at Jun. 30, 2022	76,107	$ 39	3,796	111,994	(28,419)	(11,303)
Net earnings	1,998			1,998
Other Comprehensive Income (Loss), Net Of Tax	(17,256)				(17,256)
Cash dividends paid	929			929
Treasury Stock, acquired	(128)					(128)
Treasury Stock, acquired shares		(4,640)
Sale of treasury stock	1		1
Treasury shares sold		55
Balance, End at Sep. 30, 2022	59,793	$ 39	3,797	113,063	(45,675)	(11,431)
Balance, shares at Sep. 30, 2022		3,505,355
Balance, shares at Dec. 31, 2022		3,503,452
Balance, Beg at Dec. 31, 2022	68,041	$ 39	3,797	116,600	(40,920)	(11,475)
Cumulative Effect Of Accounting Standard	(821)			(821)
Net earnings	5,380			5,380
Other Comprehensive Income (Loss), Net Of Tax	(8,093)				(8,093)
Cash dividends paid	2,833			2,833
Treasury Stock, acquired	(229)					(229)
Treasury Stock, acquired shares		(10,108)
Sale of treasury stock	6		4			2
Treasury shares sold		270
Balance, End at Sep. 30, 2023	61,451	$ 39	3,801	118,326	(49,013)	(11,702)
Balance, shares at Sep. 30, 2023		3,493,614
Balance, shares at Jun. 30, 2023		3,499,412
Balance, Beg at Jun. 30, 2023	70,976	$ 39	3,800	117,781	(39,072)	(11,572)
Net earnings	1,488			1,488
Other Comprehensive Income (Loss), Net Of Tax	(9,941)				(9,941)
Cash dividends paid	943			943
Treasury Stock, acquired	(130)					(130)
Treasury Stock, acquired shares		(5,883)
Sale of treasury stock	1		1			0
Treasury shares sold		85
Balance, End at Sep. 30, 2023	$ 61,451	$ 39	$ 3,801	$ 118,326	$ (49,013)	$ (11,702)
Balance, shares at Sep. 30, 2023		3,493,614