Loans and Allowance for Credit Losses - Classes of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Summary of classes of loans (abstract)
Total Loans Receivable	$ 3,648,984		$ 3,564,732
Net unamortized fees and costs	291		291
Total	3,649,275		3,565,023
Less allowance for credit losses	54,921	$ 56,601	58,204	$ 54,020	$ 52,950	$ 50,940
Loans and receivable, net	3,594,354		3,506,819
Agricultural
Summary of classes of loans (abstract)
Total Loans Receivable	110,079		118,924
Less allowance for credit losses	356	487	418	764	783	674
Commercial and financial
Summary of classes of loans (abstract)
Total Loans Receivable	286,801		295,618
Less allowance for credit losses	10,163	10,862	11,890	10,676	10,901	10,217
Construction, 1 to 4 family residential
Summary of classes of loans (abstract)
Total Loans Receivable	94,708		89,807
Less allowance for credit losses	676	761	617	320	322	280
Construction, land development and commercial
Summary of classes of loans (abstract)
Total Loans Receivable	259,367		248,292
Less allowance for credit losses	3,400	3,485	3,165	2,272	2,145	2,113
Mortgage, farmland
Summary of classes of loans (abstract)
Total Loans Receivable	275,762		276,790
Less allowance for credit losses	1,919	1,930	2,478	3,330	3,469	3,252
Mortgage, 1 to 4 family first liens
Summary of classes of loans (abstract)
Total Loans Receivable	1,290,463		1,261,877
Less allowance for credit losses	20,253	20,974	20,959	19,561	18,639	18,210
Mortgage, 1 to 4 family junior liens
Summary of classes of loans (abstract)
Total Loans Receivable	141,187		143,317
Less allowance for credit losses	5,281	5,517	5,639	5,030	4,642	4,719
Mortgage, multi-family
Summary of classes of loans (abstract)
Total Loans Receivable	536,449		494,282
Less allowance for credit losses	2,531	2,358	2,345	2,934	2,930	2,828
Mortgage, commercial
Summary of classes of loans (abstract)
Total Loans Receivable	581,986		565,177
Less allowance for credit losses	9,300	9,251	9,855	8,251	8,137	7,525
Loans to individuals
Summary of classes of loans (abstract)
Total Loans Receivable	30,205		28,763
Less allowance for credit losses	1,030	964	826	870	970	1,109
Obligations of state and political subdivisions
Summary of classes of loans (abstract)
Total Loans Receivable	41,977		41,885
Less allowance for credit losses	$ 12	$ 12	$ 12	$ 12	$ 12	$ 13