Statement Of Stockholder's Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Retained Earnings	Deferred Compensation	Common Stock Held By Deferred Compensation Trust	Accumulated Other Comprehensive Loss
Balance, shares at Dec. 31, 2021		5,661,569
Balance, amount at Dec. 31, 2021	$ 142,369	$ 53,305	$ 88,968	$ 1,992	$ (1,992)	$ 96
Common stock repurchase, shares		(7,000)
Common stock repurchase, amount	(199)	$ (199)	0	0	0	0
Cash dividends declared on common stock	(1,877)	$ 0	(1,877)	0	0	0
Restricted stock units exercised, shares		1,461
Restricted stock units exercised, amount	41	$ 41	0	0	0	0
Equity incentive plan, net	0	0	0	50	(50)	0
Net earnings	3,452	0	3,452	0	0	0
Change in accumulated other comprehensive loss, net of tax	(18,342)	$ 0	0	0	0	(18,342)
Balance, shares at Mar. 31, 2022		5,656,030
Balance, amount at Mar. 31, 2022	125,444	$ 53,147	90,543	2,042	(2,042)	(18,246)
Common stock repurchase, amount	(395)	(15,000)	0	0	0	0
Cash dividends declared on common stock	(1,019)	0	(1,019)	0	0	0
Equity incentive plan, net	0	0	0	57	(57)	0
Net earnings	3,217	0	3,217	0	0	0
Change in accumulated other comprehensive loss, net of tax	(14,841)	$ 0	0	0	0	(14,841)
Common stock repurchase, shares		(395)
Balance, shares at Jun. 30, 2022		5,641,030
Balance, amount at Jun. 30, 2022	112,406	$ 52,752	92,741	2,099	(2,099)	(33,087)
Balance, shares at Dec. 31, 2022		5,636,830
Balance, amount at Dec. 31, 2022	105,195	$ 52,636	100,156	2,181	(2,181)	(47,597)
Cash dividends declared on common stock	(1,925)	$ 0	(1,925)	0	0	0
Restricted stock units exercised, shares		191
Restricted stock units exercised, amount	6	$ 6	0	0	0	0
Equity incentive plan, net	0	0	0	(344)	344	0
Net earnings	3,172	0	3,172	0	0	0
Adoption of new accounting standard, net of tax	(838)	0	(838)	0	0	0
Change in accumulated other comprehensive income, net of tax	9,173	$ 0	0	0	0	9,173
Balance, shares at Mar. 31, 2023		5,637,021
Balance, amount at Mar. 31, 2023	114,783	$ 52,642	100,565	1,837	(1,837)	(38,424)
Common stock repurchase, shares		(46,222)
Common stock repurchase, amount	(833)	$ (833)	0	0	0	0
Cash dividends declared on common stock	(1,069)	0	(1,069)	0	0	0
Equity incentive plan, net	0	0	0	130	(130)	0
Net earnings	4,808	0	4,808	0	0	0
Change in accumulated other comprehensive income, net of tax	(5,319)	$ 0	0	0	0	(5,319)
Balance, shares at Jun. 30, 2023		5,590,799
Balance, amount at Jun. 30, 2023	$ 112,370	$ 51,809	$ 104,304	$ 1,967	$ (1,967)	$ (43,743)