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Loans - Loan Portfolio and Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025	Jun. 29, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Loans [Abstract]
Total loans	$ 2,335,388			$ 2,313,242
Allowance for credit losses - loans	22,454	$ 22,109	$ 22,109	21,699	$ 21,695	$ 22,797	$ 21,153
Net loans	2,312,934			2,291,543
Residential [Member]
Loans [Abstract]
Total loans	293,365			301,735
Commercial [Member]
Loans [Abstract]
Total loans	1,180,655			1,121,435
Construction [Member]
Loans [Abstract]
Total loans	107,867			164,326
Real Estate Loans [Member] | Residential [Member]
Loans [Abstract]
Total loans	344,790			351,398
Allowance for credit losses - loans	3,210	3,062		1,940	1,986	2,355	2,354
Real Estate Loans [Member] | Commercial [Member]
Loans [Abstract]
Total loans	1,180,655			1,121,435
Allowance for credit losses - loans	9,453	9,898		9,174	9,287	10,283	9,178
Real Estate Loans [Member] | Agricultural [Member]
Loans [Abstract]
Total loans	342,487			327,722
Allowance for credit losses - loans	4,804	4,542		3,529	3,815	3,770	3,264
Real Estate Loans [Member] | Construction [Member]
Loans [Abstract]
Total loans	107,867			164,326
Allowance for credit losses - loans	967	1,273		1,402	1,471	1,627	1,950
Consumer [Member]
Loans [Abstract]
Total loans	109,458			109,505
Allowance for credit losses - loans	1,325	1,119		1,338	1,163	1,008	1,412
Other Commercial Loans [Member]
Loans [Abstract]
Total loans	171,345			155,012
Allowance for credit losses - loans	2,431	1,993		3,766	2,028	3,459	2,313
Other Agricultural Loans [Member]
Loans [Abstract]
Total loans	27,142			29,662
Allowance for credit losses - loans	125	132		133	116	206	270
State and Political Subdivision Loans [Member]
Loans [Abstract]
Total loans	51,644			54,182
Allowance for credit losses - loans	$ 58	$ 56		$ 61	$ 63	$ 63	$ 45

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