Loans and Allowance for Credit Losses, Activity in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Loans, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 17,772	$ 16,377	$ 19,691	$ 14,734	$ 14,734
Charge-offs	0	0	(2,000)	(23)	(16,524)
Recoveries	101	1	182	7
Net (charge-offs) recoveries	101	1	(1,818)	(16)
Provision (credit) for credit losses	0	4,271	0	5,681
Balance, end of period	17,873	20,649	17,873	20,649	19,691
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Total allowance for credit losses and reserve for unfunded commitments	18,337	21,113	18,337	21,113
Total Provision for Credit Losses	0	4,159	0	5,645
Cumulative Effect, Period of Adoption, Adjustment [Member]
Loans, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				(250)	(250)
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Loans, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				250	250
Unfunded Commitments [Member]
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	464	576	464	0	0
Provision (credit) for credit losses	0	(112)	0	(36)
Balance, end of period	464	464	464	464	464
Unfunded Commitments [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				(500)	(500)
Unfunded Commitments [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				500	500
Construction & Development [Member]
Loans, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	1,810	1,592	1,417	1,889	1,889
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0
Net (charge-offs) recoveries	0	0	0	0
Provision (credit) for credit losses	(158)	(111)	235	(452)
Balance, end of period	1,652	1,481	1,652	1,481	1,417
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Total allowance for credit losses and reserve for unfunded commitments	1,829	1,639	1,829	1,639
Total Provision for Credit Losses	(135)	(180)	254	(465)
Construction & Development [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Loans, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				44	44
Construction & Development [Member] | Unfunded Commitments [Member]
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	154	227	158	0	0
Provision (credit) for credit losses	23	(69)	19	(13)
Balance, end of period	177	158	177	158	158
Construction & Development [Member] | Unfunded Commitments [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				171	171
1 - 4 Family Real Estate [Member]
Loans, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	1,491	1,116	1,271	890	890
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0
Net (charge-offs) recoveries	0	0	0	0
Provision (credit) for credit losses	(113)	30	107	394
Balance, end of period	1,378	1,146	1,378	1,146	1,271
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Total allowance for credit losses and reserve for unfunded commitments	1,382	1,150	1,382	1,150
Total Provision for Credit Losses	(115)	30	107	394
1 - 4 Family Real Estate [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Loans, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				(138)	(138)
1 - 4 Family Real Estate [Member] | Unfunded Commitments [Member]
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	6	4	4	0	0
Provision (credit) for credit losses	(2)	0	0	0
Balance, end of period	4	4	4	4	4
1 - 4 Family Real Estate [Member] | Unfunded Commitments [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				4	4
Commercial Real Estate - Other [Member]
Loans, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	6,912	6,089	6,889	5,080	5,080
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0
Net (charge-offs) recoveries	0	0	0	0
Provision (credit) for credit losses	(64)	640	(41)	1,817
Balance, end of period	6,848	6,729	6,848	6,729	6,889
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Total allowance for credit losses and reserve for unfunded commitments	6,854	6,737	6,854	6,737
Total Provision for Credit Losses	(68)	634	(43)	1,801
Commercial Real Estate - Other [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Loans, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				(168)	(168)
Commercial Real Estate - Other [Member] | Unfunded Commitments [Member]
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	10	14	8	0	0
Provision (credit) for credit losses	(4)	(6)	(2)	(16)
Balance, end of period	6	8	6	8	8
Commercial Real Estate - Other [Member] | Unfunded Commitments [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				24	24
Commercial & Industrial [Member]
Loans, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	6,601	6,712	9,237	5,937	5,937
Charge-offs	0	0	(2,000)	0	(16,500)
Recoveries	98	0	176	0
Net (charge-offs) recoveries	98	0	(1,824)	0
Provision (credit) for credit losses	385	3,718	(329)	3,777
Balance, end of period	7,084	10,430	7,084	10,430	9,237
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Total allowance for credit losses and reserve for unfunded commitments	7,343	10,710	7,343	10,710
Total Provision for Credit Losses	366	3,693	(350)	3,783
Commercial & Industrial [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Loans, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				716	716
Commercial & Industrial [Member] | Unfunded Commitments [Member]
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	278	305	280	0	0
Provision (credit) for credit losses	(19)	(25)	(21)	6
Balance, end of period	259	280	259	280	280
Commercial & Industrial [Member] | Unfunded Commitments [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				274	274
Agricultural [Member]
Loans, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	698	601	628	765	765
Charge-offs	0	0	0	(7)	(7)
Recoveries	3	0	6	2
Net (charge-offs) recoveries	3	0	6	(5)
Provision (credit) for credit losses	(22)	8	45	(2)
Balance, end of period	679	609	679	609	628
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Total allowance for credit losses and reserve for unfunded commitments	694	620	694	620
Total Provision for Credit Losses	(20)	(5)	49	(16)
Agricultural [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Loans, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				(149)	(149)
Agricultural [Member] | Unfunded Commitments [Member]
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	13	24	11	0	0
Provision (credit) for credit losses	2	(13)	4	(14)
Balance, end of period	15	11	15	11	11
Agricultural [Member] | Unfunded Commitments [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				25	25
Consumer [Member]
Loans, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	260	267	249	173	173
Charge-offs	0	0	0	(16)	(17)
Recoveries	0	1	0	5
Net (charge-offs) recoveries	0	1	0	(11)
Provision (credit) for credit losses	(28)	(14)	(17)	147
Balance, end of period	232	254	232	254	249
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Total allowance for credit losses and reserve for unfunded commitments	235	257	235	257
Total Provision for Credit Losses	(28)	(13)	(17)	148
Consumer [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Loans, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				(55)	(55)
Consumer [Member] | Unfunded Commitments [Member]
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	3	2	3	0	0
Provision (credit) for credit losses	0	1	0	1
Balance, end of period	$ 3	$ 3	$ 3	3	3
Consumer [Member] | Unfunded Commitments [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Unfunded Commitments, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period				$ 2	$ 2