Loans and Allowance for Credit Losses - Allowance for Credit Losses Based on Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance	$ 70,051	$ 67,936	$ 70,182	$ 68,675	$ 68,675
Provision (release) for credit loss expense	2,567	1,083	4,219	726	5,635
Loans charged off	(2,261)	(985)	(4,344)	(1,804)	(5,748)
Recoveries collected	803	278	1,103	715	1,620
Allowance for credit losses, Ending Balance	71,160	68,312	71,160	68,312	70,182
Construction and Land Development \| Real Estate Loan
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance	3,731	2,701	3,275	2,918	2,918
Provision (release) for credit loss expense	335	(55)	791	(272)	352
Loans charged off	0	0	0	0	0
Recoveries collected	0	0	0	0	5
Allowance for credit losses, Ending Balance	4,066	2,646	4,066	2,646	3,275
Agricultural \| Real Estate Loan
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance	1,292	1,358	1,361	1,366	1,366
Provision (release) for credit loss expense	30	14	(39)	6	(5)
Loans charged off	0	0	0	0	0
Recoveries collected	0	0	0	0	0
Allowance for credit losses, Ending Balance	1,322	1,372	1,322	1,372	1,361
Residential Properties \| Real Estate Loan \| 1-4 Family
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance	3,544	3,778	3,579	4,220	4,220
Provision (release) for credit loss expense	(7)	(264)	(21)	(688)	(785)
Loans charged off	(55)	(34)	(94)	(101)	(195)
Recoveries collected	134	100	152	149	339
Allowance for credit losses, Ending Balance	3,616	3,580	3,616	3,580	3,579
Commercial \| Real Estate Loan
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance	32,214	32,537	32,669	31,758	31,758
Provision (release) for credit loss expense	1,111	376	986	994	1,178
Loans charged off	(70)	0	(408)	0	(451)
Recoveries collected	3	5	11	166	184
Allowance for credit losses, Ending Balance	33,258	32,918	33,258	32,918	32,669
Agricultural Loans
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance	1,649	778	1,957	705	705
Provision (release) for credit loss expense	1,287	316	2,096	441	3,587
Loans charged off	(1,386)	(209)	(2,503)	(261)	(2,410)
Recoveries collected	217	0	217	0	75
Allowance for credit losses, Ending Balance	1,767	885	1,767	885	1,957
Commercial and Industrial Loans
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance	26,028	24,631	25,602	25,450	25,450
Provision (release) for credit loss expense	(203)	624	356	15	510
Loans charged off	(489)	(368)	(712)	(642)	(688)
Recoveries collected	282	44	372	108	330
Allowance for credit losses, Ending Balance	25,618	24,931	25,618	24,931	25,602
Consumer Loans
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance	1,593	2,153	1,739	2,258	2,258
Provision (release) for credit loss expense	14	72	50	230	798
Loans charged off	(261)	(374)	(627)	(800)	(2,004)
Recoveries collected	167	129	351	292	687
Allowance for credit losses, Ending Balance	$ 1,513	$ 1,980	$ 1,513	$ 1,980	$ 1,739

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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amount of increase (decrease) in allowance for credit loss on financing receivable.

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