Loans, Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	$ 21,153	$ 18,552	$ 18,552
Charge-offs	(674)	(7)
Recoveries	7	5
Provision	1,112	0
Balance at end of period	21,598	15,250	21,153
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period		(3,300)	(3,300)
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Charge-offs	0		(1)
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Charge-offs	0		0
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Charge-offs	0		0
Real Estate Loans [Member] | Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	2,354	1,056	1,056
Charge-offs	0	0
Recoveries	0	0
Provision	(7)	60
Balance at end of period	2,347	1,195	2,354
Real Estate Loans [Member] | Residential [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period		79	79
Real Estate Loans [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	9,178	10,120	10,120
Charge-offs	0	0
Recoveries	0	0
Provision	563	(303)
Balance at end of period	9,741	6,747	9,178
Real Estate Loans [Member] | Commercial [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period		(3,070)	(3,070)
Real Estate Loans [Member] | Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	3,264	4,589	4,589
Charge-offs	0	0
Recoveries	0	0
Provision	408	(35)
Balance at end of period	3,672	3,409	3,264
Real Estate Loans [Member] | Agricultural [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period		(1,145)	(1,145)
Real Estate Loans [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	1,950	801	801
Charge-offs	0	0
Recoveries	0	0
Provision	(355)	153
Balance at end of period	1,595	851	1,950
Real Estate Loans [Member] | Construction [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period		(103)	(103)
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	1,496	135	135
Charge-offs	(30)	(7)
Recoveries	5	4
Provision	(205)	48
Balance at end of period	1,266	1,220	1,496
Consumer [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period		1,040	1,040
Other Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	2,229	1,040	1,040
Charge-offs	(644)	0	(963)
Recoveries	2	1
Provision	1,093	(1)
Balance at end of period	2,680	712	2,229
Other Commercial Loans [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period		(328)	(328)
Other Agricultural Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	270	489	489
Charge-offs	0	0	0
Recoveries	0	0
Provision	(96)	(20)
Balance at end of period	174	250	270
Other Agricultural Loans [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period		(219)	(219)
State and Political Subdivision Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	45	322	322
Charge-offs	0	0	0
Recoveries	0	0
Provision	20	0
Balance at end of period	65	42	45
State and Political Subdivision Loans [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period		(280)	(280)
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	367	0	0
Charge-offs	0	0
Recoveries	0	0
Provision	(309)	98
Balance at end of period	$ 58	824	367
Unallocated [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period		$ 726	$ 726