Loans, Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	$ 21,699	$ 21,153	$ 21,153
Charge-offs	(185)	(674)
Recoveries	29	7
Provision	538	1,112
Balance at end of period	22,081	21,598	21,699
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Charge-offs	0		(5)
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Charge-offs	(40)		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	1,940	2,354	2,354
Charge-offs	0	0
Recoveries	0	0
Provision	1,273	(7)
Balance at end of period	3,213	2,347	1,940
Real Estate Loans [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	9,174	9,178	9,178
Charge-offs	(40)	0
Recoveries	0	0
Provision	103	563
Balance at end of period	9,237	9,741	9,174
Real Estate Loans [Member] | Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	3,529	3,264	3,264
Charge-offs	0	0
Recoveries	0	0
Provision	821	408
Balance at end of period	4,350	3,672	3,529
Real Estate Loans [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	1,402	1,950	1,950
Charge-offs	0	0
Recoveries	0	0
Provision	150	(355)
Balance at end of period	1,552	1,595	1,402
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	1,405	1,496	1,496
Charge-offs	(22)	(30)
Recoveries	26	5
Provision	9	(205)
Balance at end of period	1,418	1,266	1,405
Other Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	3,699	2,229	2,229
Charge-offs	(123)	(644)	(2,561)
Recoveries	3	2
Provision	(1,547)	1,093
Balance at end of period	2,032	2,680	3,699
Other Agricultural Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	133	270	270
Charge-offs	0	0	0
Recoveries	0	0
Provision	4	(96)
Balance at end of period	137	174	133
State and Political Subdivision Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	61	45	45
Charge-offs	0	0	0
Recoveries	0	0
Provision	(4)	20
Balance at end of period	57	65	61
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	356	367	367
Charge-offs	0	0
Recoveries	0	0
Provision	(271)	(309)
Balance at end of period	$ 85	$ 58	$ 356