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Loans and Allowance for Credit Losses - Credit Risk Profile of Loan Portfolio on Amortized Cost Basis Based on Risk Rating Category and Year of Origination (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Credit Quality Information [Abstract]
Current fiscal year	$ 1,007,885	$ 862,051
Fiscal year before current fiscal year	696,754	653,404
Two years before current fiscal year	464,744	1,261,147
Three years before current fiscal year	1,105,651	891,374
Four years before current fiscal year	831,783	546,507
Prior	1,627,731	1,377,588
Revolving Loans	89,490	80,391
Current period gross write-offs, current fiscal year	0	108
Current period gross write-offs, fiscal year before current fiscal year	999	2,369
Current period gross write-offs, two year before current fiscal year	1,386	625
Current period gross write-offs, three year before current fiscal year	1,498	602
Current period gross write-offs, four year before current fiscal year	846	69
Current period gross write-offs, prior	1,706	1,975
Current period gross write-offs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	5,824,038	5,672,462
Current period gross write-offs, total loans receivables	6,435	5,748
Pass
Credit Quality Information [Abstract]
Current fiscal year	1,005,132	859,452
Fiscal year before current fiscal year	676,049	626,738
Two years before current fiscal year	434,662	1,245,490
Three years before current fiscal year	1,083,546	885,295
Four years before current fiscal year	823,567	542,310
Prior	1,576,107	1,340,099
Revolving Loans	88,471	79,714
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	5,687,534	5,579,098
Special Mention
Credit Quality Information [Abstract]
Current fiscal year	1,743	1,505
Fiscal year before current fiscal year	16,090	17,281
Two years before current fiscal year	11,443	6,668
Three years before current fiscal year	13,593	4,213
Four years before current fiscal year	4,422	3,488
Prior	13,904	24,634
Revolving Loans	0	59
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	61,195	57,848
Substandard
Credit Quality Information [Abstract]
Current fiscal year	1,010	1,094
Fiscal year before current fiscal year	4,615	9,385
Two years before current fiscal year	18,639	8,989
Three years before current fiscal year	8,512	1,866
Four years before current fiscal year	3,794	709
Prior	37,720	12,855
Revolving Loans	1,019	618
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	75,309	35,516
Agricultural Loans
Credit Quality Information [Abstract]
Current fiscal year	199,072	176,862
Fiscal year before current fiscal year	63,115	33,324
Two years before current fiscal year	15,634	16,332
Three years before current fiscal year	17,585	9,262
Four years before current fiscal year	12,435	1,585
Prior	3,753	2,306
Revolving Loans	0	0
Current period gross write-offs, current fiscal year	0	0
Current period gross write-offs, fiscal year before current fiscal year	280	2,213
Current period gross write-offs, two year before current fiscal year	1,081	100
Current period gross write-offs, three year before current fiscal year	836	52
Current period gross write-offs, four year before current fiscal year	306	0
Current period gross write-offs, prior	0	45
Current period gross write-offs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	311,594	239,671
Current period gross write-offs, total loans receivables	2,503	2,410
Agricultural Loans | Pass
Credit Quality Information [Abstract]
Current fiscal year	197,424	175,402
Fiscal year before current fiscal year	62,560	24,024
Two years before current fiscal year	13,421	13,147
Three years before current fiscal year	16,830	9,162
Four years before current fiscal year	12,412	1,585
Prior	3,753	2,306
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	306,400	225,626
Agricultural Loans | Special Mention
Credit Quality Information [Abstract]
Current fiscal year	1,355	617
Fiscal year before current fiscal year	76	2,208
Two years before current fiscal year	11	976
Three years before current fiscal year	0	100
Four years before current fiscal year	23	0
Prior	0	0
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,465	3,901
Agricultural Loans | Substandard
Credit Quality Information [Abstract]
Current fiscal year	293	843
Fiscal year before current fiscal year	479	7,092
Two years before current fiscal year	2,202	2,209
Three years before current fiscal year	755	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	3,729	10,144
Commercial Industrial And Other Portfolio Segment
Credit Quality Information [Abstract]
Current fiscal year	362,509	307,904
Fiscal year before current fiscal year	243,881	230,970
Two years before current fiscal year	112,837	280,911
Three years before current fiscal year	230,988	184,236
Four years before current fiscal year	163,610	132,123
Prior	399,768	369,008
Revolving Loans	0	0
Current period gross write-offs, current fiscal year	0	10
Current period gross write-offs, fiscal year before current fiscal year	0	47
Current period gross write-offs, two year before current fiscal year	163	207
Current period gross write-offs, three year before current fiscal year	225	378
Current period gross write-offs, four year before current fiscal year	497	10
Current period gross write-offs, prior	769	36
Current period gross write-offs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,513,593	1,505,152
Current period gross write-offs, total loans receivables	1,654	688
Commercial Industrial And Other Portfolio Segment | Pass
Credit Quality Information [Abstract]
Current fiscal year	362,349	307,785
Fiscal year before current fiscal year	228,578	228,411
Two years before current fiscal year	101,224	278,845
Three years before current fiscal year	228,885	183,042
Four years before current fiscal year	159,932	131,005
Prior	377,237	360,610
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,458,205	1,489,698
Commercial Industrial And Other Portfolio Segment | Special Mention
Credit Quality Information [Abstract]
Current fiscal year	160	54
Fiscal year before current fiscal year	15,055	1,149
Two years before current fiscal year	9,367	1,277
Three years before current fiscal year	578	748
Four years before current fiscal year	3,340	1,020
Prior	5,108	7,583
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	33,608	11,831
Commercial Industrial And Other Portfolio Segment | Substandard
Credit Quality Information [Abstract]
Current fiscal year	0	65
Fiscal year before current fiscal year	248	1,410
Two years before current fiscal year	2,246	789
Three years before current fiscal year	1,525	446
Four years before current fiscal year	338	98
Prior	17,423	815
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	21,780	3,623
Consumer Loans
Credit Quality Information [Abstract]
Current fiscal year	4,727	5,110
Fiscal year before current fiscal year	3,006	5,159
Two years before current fiscal year	3,270	24,703
Three years before current fiscal year	15,520	12,026
Four years before current fiscal year	6,868	4,548
Prior	2,926	2,414
Revolving Loans	0	0
Current period gross write-offs, current fiscal year	0	98
Current period gross write-offs, fiscal year before current fiscal year	20	63
Current period gross write-offs, two year before current fiscal year	26	154
Current period gross write-offs, three year before current fiscal year	99	139
Current period gross write-offs, four year before current fiscal year	43	59
Current period gross write-offs, prior	781	1,491
Current period gross write-offs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	36,317	53,960
Current period gross write-offs, total loans receivables	969	2,004
Consumer Loans | Pass
Credit Quality Information [Abstract]
Current fiscal year	4,722	5,098
Fiscal year before current fiscal year	2,978	5,138
Two years before current fiscal year	3,253	24,430
Three years before current fiscal year	15,325	11,810
Four years before current fiscal year	6,736	4,494
Prior	2,864	2,385
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	35,878	53,355
Consumer Loans | Special Mention
Credit Quality Information [Abstract]
Current fiscal year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0	14
Three years before current fiscal year	44	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	44	14
Consumer Loans | Substandard
Credit Quality Information [Abstract]
Current fiscal year	5	12
Fiscal year before current fiscal year	28	21
Two years before current fiscal year	17	259
Three years before current fiscal year	151	216
Four years before current fiscal year	132	54
Prior	62	29
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	395	591
Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	3,962,534	3,873,679
Real Estate Loan | Construction and Land Development
Credit Quality Information [Abstract]
Current fiscal year	72,819	82,696
Fiscal year before current fiscal year	120,295	101,715
Two years before current fiscal year	103,131	14,396
Three years before current fiscal year	9,558	15,817
Four years before current fiscal year	15,038	4,735
Prior	15,954	16,734
Revolving Loans	0	0
Current period gross write-offs, current fiscal year	0	0
Current period gross write-offs, fiscal year before current fiscal year	0	0
Current period gross write-offs, two year before current fiscal year	107	0
Current period gross write-offs, three year before current fiscal year	0	0
Current period gross write-offs, four year before current fiscal year	0	0
Current period gross write-offs, prior	0	0
Current period gross write-offs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	336,795	236,093
Current period gross write-offs, total loans receivables	107	0
Real Estate Loan | Construction and Land Development | Pass
Credit Quality Information [Abstract]
Current fiscal year	72,819	82,696
Fiscal year before current fiscal year	120,295	101,715
Two years before current fiscal year	103,131	14,390
Three years before current fiscal year	9,553	15,817
Four years before current fiscal year	15,038	4,735
Prior	15,589	16,342
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	336,425	235,695
Real Estate Loan | Construction and Land Development | Special Mention
Credit Quality Information [Abstract]
Current fiscal year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	357	382
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	357	382
Real Estate Loan | Construction and Land Development | Substandard
Credit Quality Information [Abstract]
Current fiscal year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0	6
Three years before current fiscal year	5	0
Four years before current fiscal year	0	0
Prior	8	10
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	13	16
Real Estate Loan | Agricultural
Credit Quality Information [Abstract]
Current fiscal year	30,232	25,824
Fiscal year before current fiscal year	22,947	17,625
Two years before current fiscal year	14,687	160,506
Three years before current fiscal year	134,180	56,069
Four years before current fiscal year	60,132	50,455
Prior	105,295	80,281
Revolving Loans	0	0
Current period gross write-offs, current fiscal year	0	0
Current period gross write-offs, fiscal year before current fiscal year	0	0
Current period gross write-offs, two year before current fiscal year	0	0
Current period gross write-offs, three year before current fiscal year	0	0
Current period gross write-offs, four year before current fiscal year	0	0
Current period gross write-offs, prior	0	0
Current period gross write-offs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	367,473	390,760
Current period gross write-offs, total loans receivables	0	0
Real Estate Loan | Agricultural | Pass
Credit Quality Information [Abstract]
Current fiscal year	29,421	25,824
Fiscal year before current fiscal year	22,408	17,292
Two years before current fiscal year	12,699	159,433
Three years before current fiscal year	132,936	55,083
Four years before current fiscal year	59,142	48,700
Prior	98,280	73,592
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	354,886	379,924
Real Estate Loan | Agricultural | Special Mention
Credit Quality Information [Abstract]
Current fiscal year	228	0
Fiscal year before current fiscal year	539	192
Two years before current fiscal year	1,988	107
Three years before current fiscal year	1,139	986
Four years before current fiscal year	990	1,755
Prior	2,600	5,630
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	7,484	8,670
Real Estate Loan | Agricultural | Substandard
Credit Quality Information [Abstract]
Current fiscal year	583	0
Fiscal year before current fiscal year	0	141
Two years before current fiscal year	0	966
Three years before current fiscal year	105	0
Four years before current fiscal year	0	0
Prior	4,415	1,059
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	5,103	2,166
Real Estate Loan | Commercial And Multifamily Portfolio Segment
Credit Quality Information [Abstract]
Current fiscal year	289,806	216,956
Fiscal year before current fiscal year	208,414	227,485
Two years before current fiscal year	183,487	688,599
Three years before current fiscal year	630,575	537,576
Four years before current fiscal year	503,891	290,568
Prior	946,556	789,045
Revolving Loans	0	0
Current period gross write-offs, current fiscal year	0	0
Current period gross write-offs, fiscal year before current fiscal year	699	0
Current period gross write-offs, two year before current fiscal year	0	151
Current period gross write-offs, three year before current fiscal year	338	0
Current period gross write-offs, four year before current fiscal year	0	0
Current period gross write-offs, prior	70	300
Current period gross write-offs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	2,762,729	2,750,229
Current period gross write-offs, total loans receivables	1,107	451
Real Estate Loan | Commercial And Multifamily Portfolio Segment | Pass
Credit Quality Information [Abstract]
Current fiscal year	289,806	216,297
Fiscal year before current fiscal year	204,644	213,704
Two years before current fiscal year	169,816	680,665
Three years before current fiscal year	613,889	535,056
Four years before current fiscal year	501,485	289,855
Prior	932,382	774,516
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	2,712,022	2,710,093
Real Estate Loan | Commercial And Multifamily Portfolio Segment | Special Mention
Credit Quality Information [Abstract]
Current fiscal year	0	659
Fiscal year before current fiscal year	420	13,732
Two years before current fiscal year	77	4,090
Three years before current fiscal year	11,589	2,053
Four years before current fiscal year	0	713
Prior	5,092	10,462
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	17,178	31,709
Real Estate Loan | Commercial And Multifamily Portfolio Segment | Substandard
Credit Quality Information [Abstract]
Current fiscal year	0	0
Fiscal year before current fiscal year	3,350	49
Two years before current fiscal year	13,594	3,844
Three years before current fiscal year	5,097	467
Four years before current fiscal year	2,406	0
Prior	9,082	4,067
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	33,529	8,427
1-4 Family | Real Estate Loan
Credit Quality Information [Abstract]
Current fiscal year	48,720	46,699
Fiscal year before current fiscal year	35,096	37,126
Two years before current fiscal year	31,698	75,700
Three years before current fiscal year	67,245	76,388
Four years before current fiscal year	69,809	62,493
Prior	153,479	117,800
Revolving Loans	89,490	80,391
Current period gross write-offs, current fiscal year	0	0
Current period gross write-offs, fiscal year before current fiscal year	0	46
Current period gross write-offs, two year before current fiscal year	9	13
Current period gross write-offs, three year before current fiscal year	0	33
Current period gross write-offs, four year before current fiscal year	0	0
Current period gross write-offs, prior	86	103
Current period gross write-offs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	495,537	496,597
Current period gross write-offs, total loans receivables	95	195
1-4 Family | Real Estate Loan | Pass
Credit Quality Information [Abstract]
Current fiscal year	48,591	46,350
Fiscal year before current fiscal year	34,586	36,454
Two years before current fiscal year	31,118	74,580
Three years before current fiscal year	66,128	75,325
Four years before current fiscal year	68,822	61,936
Prior	146,002	110,348
Revolving Loans	88,471	79,714
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	483,718	484,707
1-4 Family | Real Estate Loan | Special Mention
Credit Quality Information [Abstract]
Current fiscal year	0	175
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0	204
Three years before current fiscal year	243	326
Four years before current fiscal year	69	0
Prior	747	577
Revolving Loans	0	59
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,059	1,341
1-4 Family | Real Estate Loan | Substandard
Credit Quality Information [Abstract]
Current fiscal year	129	174
Fiscal year before current fiscal year	510	672
Two years before current fiscal year	580	916
Three years before current fiscal year	874	737
Four years before current fiscal year	918	557
Prior	6,730	6,875
Revolving Loans	1,019	618
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	$ 10,760	$ 10,549

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