Loans - Loan Portfolio and Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Loans [Abstract]
Total loans	$ 2,298,222	$ 2,350,622
Allowance for credit losses - loans	(22,894)	(22,806)	$ (22,081)	$ (21,699)
Net loans	2,275,328	2,327,816
Residential [Member]
Loans [Abstract]
Total loans	283,986	288,664
Commercial [Member]
Loans [Abstract]
Total loans	1,249,900	1,218,514
Construction [Member]
Loans [Abstract]
Total loans	83,217	93,965
Real Estate Loans [Member] | Residential [Member]
Loans [Abstract]
Total loans	336,066	340,972
Allowance for credit losses - loans	(2,741)	(3,112)	(3,213)	(1,940)
Real Estate Loans [Member] | Commercial [Member]
Loans [Abstract]
Total loans	1,249,900	1,218,514
Allowance for credit losses - loans	(10,605)	(10,017)	(9,237)	(9,174)
Real Estate Loans [Member] | Agricultural [Member]
Loans [Abstract]
Total loans	344,938	347,448
Allowance for credit losses - loans	(4,513)	(4,841)	(4,350)	(3,529)
Real Estate Loans [Member] | Construction [Member]
Loans [Abstract]
Total loans	83,217	93,965
Allowance for credit losses - loans	(802)	(916)	(1,552)	(1,402)
Consumer [Member]
Loans [Abstract]
Total loans	19,592	88,210
Allowance for credit losses - loans	(1,036)	(1,201)	(1,418)	(1,405)
Other Commercial Loans [Member]
Loans [Abstract]
Total loans	170,628	179,166
Allowance for credit losses - loans	(2,815)	(2,534)	(2,032)	(3,699)
Other Agricultural Loans [Member]
Loans [Abstract]
Total loans	30,004	30,247
Allowance for credit losses - loans	(223)	(115)	(137)	(133)
State and Political Subdivision Loans [Member]
Loans [Abstract]
Total loans	63,877	52,100
Allowance for credit losses - loans	$ (154)	$ (55)	$ (57)	$ (61)