Loans and Allowance for Credit Losses - Classes of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Summary of classes of loans (abstract)
Total Loans Receivable	$ 3,578,440	$ 3,564,732
Net unamortized fees and costs	279	291
Total	3,578,719	3,565,023
Less allowance for credit losses	56,601	58,204	$ 52,950	$ 50,940
Loans and receivable, net	3,522,118	3,506,819
Agricultural
Summary of classes of loans (abstract)
Total Loans Receivable	122,863	118,924
Less allowance for credit losses	487	418	783	674
Commercial and financial
Summary of classes of loans (abstract)
Total Loans Receivable	294,009	295,618
Less allowance for credit losses	10,862	11,890	10,901	10,217
Construction, 1 to 4 family residential
Summary of classes of loans (abstract)
Total Loans Receivable	101,568	89,807
Less allowance for credit losses	761	617	322	280
Construction, land development and commercial
Summary of classes of loans (abstract)
Total Loans Receivable	259,006	248,292
Less allowance for credit losses	3,485	3,165	2,145	2,113
Mortgage, farmland
Summary of classes of loans (abstract)
Total Loans Receivable	273,485	276,790
Less allowance for credit losses	1,930	2,478	3,469	3,252
Mortgage, 1 to 4 family first liens
Summary of classes of loans (abstract)
Total Loans Receivable	1,255,829	1,261,877
Less allowance for credit losses	20,974	20,959	18,639	18,210
Mortgage, 1 to 4 family junior liens
Summary of classes of loans (abstract)
Total Loans Receivable	139,854	143,317
Less allowance for credit losses	5,517	5,639	4,642	4,719
Mortgage, multi-family
Summary of classes of loans (abstract)
Total Loans Receivable	495,392	494,282
Less allowance for credit losses	2,358	2,345	2,930	2,828
Mortgage, commercial
Summary of classes of loans (abstract)
Total Loans Receivable	567,272	565,177
Less allowance for credit losses	9,251	9,855	8,137	7,525
Loans to individuals
Summary of classes of loans (abstract)
Total Loans Receivable	27,308	28,763
Less allowance for credit losses	964	826	970	1,109
Obligations of state and political subdivisions
Summary of classes of loans (abstract)
Total Loans Receivable	41,854	41,885
Less allowance for credit losses	$ 12	$ 12	$ 12	$ 13