Loans and Allowance for Credit Losses - Credit Risk Profile of Loan Portfolio on Amortized Cost Basis Based on Risk Rating Category (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Credit Quality Information [Abstract]
Current fiscal year	$ 558,007	$ 792,071
Fiscal year before current fiscal year	699,958	1,402,051
Two years before current fiscal year	1,312,925	994,108
Three years before current fiscal year	929,158	619,354
Four years before current fiscal year	564,300	381,174
Prior	1,471,605	1,315,596
Revolving Loans	78,637	76,211
Current period gross writeoffs, current fiscal year	71	10
Current period gross writeoffs, fiscal year before current fiscal year	190	761
Current period gross writeoffs, two year before current fiscal year	622	208
Current period gross writeoffs, three year before current fiscal year	556	51
Current period gross writeoffs, four year before current fiscal year	58	93
Current period gross writeoffs, prior	1,641	1,508
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	5,614,591	5,580,565
Current period gross writeoffs, total loans receivables	3,138	2,631
Pass
Credit Quality Information [Abstract]
Current fiscal year	555,677	786,908
Fiscal year before current fiscal year	695,258	1,390,885
Two years before current fiscal year	1,301,213	976,531
Three years before current fiscal year	918,731	616,020
Four years before current fiscal year	561,719	376,655
Prior	1,436,895	1,254,871
Revolving Loans	77,910	75,700
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	5,547,403	5,477,570
Special Mention
Credit Quality Information [Abstract]
Current fiscal year	2,049	4,925
Fiscal year before current fiscal year	1,529	5,566
Two years before current fiscal year	5,793	15,110
Three years before current fiscal year	9,044	2,721
Four years before current fiscal year	1,638	3,368
Prior	18,009	42,350
Revolving Loans	88	10
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	38,151	74,050
Substandard
Credit Quality Information [Abstract]
Current fiscal year	281	238
Fiscal year before current fiscal year	3,171	5,600
Two years before current fiscal year	5,919	2,467
Three years before current fiscal year	1,383	613
Four years before current fiscal year	943	1,151
Prior	16,701	18,375
Revolving Loans	639	501
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	29,037	28,945
Agricultural Loans
Credit Quality Information [Abstract]
Current fiscal year	128,119	147,999
Fiscal year before current fiscal year	56,668	27,905
Two years before current fiscal year	26,016	10,044
Three years before current fiscal year	15,584	2,549
Four years before current fiscal year	3,110	1,921
Prior	3,917	5,854
Revolving Loans	0	0
Current period gross writeoffs, current fiscal year	0	0
Current period gross writeoffs, fiscal year before current fiscal year	64	276
Current period gross writeoffs, two year before current fiscal year	100	0
Current period gross writeoffs, three year before current fiscal year	52	0
Current period gross writeoffs, four year before current fiscal year	0	0
Current period gross writeoffs, prior	45	132
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	233,414	196,272
Current period gross writeoffs, total loans receivables	261	408
Agricultural Loans \| Pass
Credit Quality Information [Abstract]
Current fiscal year	127,739	147,993
Fiscal year before current fiscal year	54,805	27,895
Two years before current fiscal year	25,999	10,044
Three years before current fiscal year	15,584	2,549
Four years before current fiscal year	3,110	1,883
Prior	3,917	5,854
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	231,154	196,218
Agricultural Loans \| Special Mention
Credit Quality Information [Abstract]
Current fiscal year	327	6
Fiscal year before current fiscal year	302	10
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	38
Prior	0	0
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	629	54
Agricultural Loans \| Substandard
Credit Quality Information [Abstract]
Current fiscal year	53	0
Fiscal year before current fiscal year	1,561	0
Two years before current fiscal year	17	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,631	0
Commercial Industrial And Other Portfolio Segment
Credit Quality Information [Abstract]
Current fiscal year	171,300	291,351
Fiscal year before current fiscal year	264,169	309,188
Two years before current fiscal year	284,306	242,971
Three years before current fiscal year	203,627	155,119
Four years before current fiscal year	126,019	74,532
Prior	409,427	377,607
Revolving Loans	0	0
Current period gross writeoffs, current fiscal year	0	0
Current period gross writeoffs, fiscal year before current fiscal year	47	353
Current period gross writeoffs, two year before current fiscal year	207	0
Current period gross writeoffs, three year before current fiscal year	378	49
Current period gross writeoffs, four year before current fiscal year	10	20
Current period gross writeoffs, prior	1	107
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,458,849	1,450,768
Current period gross writeoffs, total loans receivables	643	529
Commercial Industrial And Other Portfolio Segment \| Pass
Credit Quality Information [Abstract]
Current fiscal year	171,046	290,304
Fiscal year before current fiscal year	262,373	306,794
Two years before current fiscal year	282,671	232,198
Three years before current fiscal year	197,515	154,499
Four years before current fiscal year	124,654	73,906
Prior	401,109	347,957
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,439,368	1,405,658
Commercial Industrial And Other Portfolio Segment \| Special Mention
Credit Quality Information [Abstract]
Current fiscal year	189	1,047
Fiscal year before current fiscal year	1,031	1,857
Two years before current fiscal year	1,388	9,982
Three years before current fiscal year	5,927	562
Four years before current fiscal year	1,347	597
Prior	7,662	28,900
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	17,545	42,945
Commercial Industrial And Other Portfolio Segment \| Substandard
Credit Quality Information [Abstract]
Current fiscal year	65	0
Fiscal year before current fiscal year	765	537
Two years before current fiscal year	247	791
Three years before current fiscal year	185	58
Four years before current fiscal year	18	29
Prior	656	750
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,936	2,165
Consumer Loans
Credit Quality Information [Abstract]
Current fiscal year	4,678	9,633
Fiscal year before current fiscal year	6,201	40,656
Two years before current fiscal year	28,000	21,589
Three years before current fiscal year	13,682	10,526
Four years before current fiscal year	5,774	4,534
Prior	4,887	4,076
Revolving Loans	0	0
Current period gross writeoffs, current fiscal year	71	22
Current period gross writeoffs, fiscal year before current fiscal year	43	177
Current period gross writeoffs, two year before current fiscal year	154	89
Current period gross writeoffs, three year before current fiscal year	126	10
Current period gross writeoffs, four year before current fiscal year	48	7
Current period gross writeoffs, prior	1,198	1,075
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	63,222	91,014
Current period gross writeoffs, total loans receivables	1,640	1,380
Consumer Loans \| Pass
Credit Quality Information [Abstract]
Current fiscal year	4,678	9,547
Fiscal year before current fiscal year	6,171	40,225
Two years before current fiscal year	27,723	21,264
Three years before current fiscal year	13,491	10,387
Four years before current fiscal year	5,671	4,475
Prior	4,856	4,035
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	62,590	89,933
Consumer Loans \| Special Mention
Credit Quality Information [Abstract]
Current fiscal year	0	0
Fiscal year before current fiscal year	0	26
Two years before current fiscal year	24	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	24	26
Consumer Loans \| Substandard
Credit Quality Information [Abstract]
Current fiscal year	0	86
Fiscal year before current fiscal year	30	405
Two years before current fiscal year	253	325
Three years before current fiscal year	191	139
Four years before current fiscal year	103	59
Prior	31	41
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	608	1,055
Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	3,859,106	3,842,511
Real Estate Loan \| Construction and Land Development
Credit Quality Information [Abstract]
Current fiscal year	48,615	68,086
Fiscal year before current fiscal year	78,688	74,065
Two years before current fiscal year	19,267	27,392
Three years before current fiscal year	16,051	5,188
Four years before current fiscal year	5,290	10,795
Prior	22,946	19,551
Revolving Loans	0	0
Current period gross writeoffs, current fiscal year	0	0
Current period gross writeoffs, fiscal year before current fiscal year	0	0
Current period gross writeoffs, two year before current fiscal year	0	0
Current period gross writeoffs, three year before current fiscal year	0	0
Current period gross writeoffs, four year before current fiscal year	0	14
Current period gross writeoffs, prior	0	0
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	190,857	205,077
Current period gross writeoffs, total loans receivables	0	14
Real Estate Loan \| Construction and Land Development \| Pass
Credit Quality Information [Abstract]
Current fiscal year	48,615	68,086
Fiscal year before current fiscal year	78,688	74,065
Two years before current fiscal year	19,261	27,392
Three years before current fiscal year	16,051	5,188
Four years before current fiscal year	5,290	10,795
Prior	22,542	19,115
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	190,447	204,641
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	390	0
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	390	0
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	6	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	14	436
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	20	436
Real Estate Loan \| Agricultural
Credit Quality Information [Abstract]
Current fiscal year	16,436	19,437
Fiscal year before current fiscal year	19,210	164,812
Two years before current fiscal year	158,601	58,813
Three years before current fiscal year	55,492	53,249
Four years before current fiscal year	51,161	20,589
Prior	83,720	74,232
Revolving Loans	0	0
Current period gross writeoffs, current fiscal year	0	0
Current period gross writeoffs, fiscal year before current fiscal year	0	0
Current period gross writeoffs, two year before current fiscal year	0	0
Current period gross writeoffs, three year before current fiscal year	0	0
Current period gross writeoffs, four year before current fiscal year	0	0
Current period gross writeoffs, prior	0	0
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	384,620	391,132
Current period gross writeoffs, total loans receivables	0	0
Real Estate Loan \| Agricultural \| Pass
Credit Quality Information [Abstract]
Current fiscal year	15,266	19,231
Fiscal year before current fiscal year	18,873	164,812
Two years before current fiscal year	157,635	57,815
Three years before current fiscal year	54,503	53,249
Four years before current fiscal year	51,161	19,419
Prior	80,611	71,189
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	378,049	385,715
Real Estate Loan \| Agricultural \| Special Mention
Credit Quality Information [Abstract]
Current fiscal year	1,170	206
Fiscal year before current fiscal year	196	0
Two years before current fiscal year	0	627
Three years before current fiscal year	989	0
Four years before current fiscal year	0	1,170
Prior	2,028	1,868
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	4,383	3,871
Real Estate Loan \| Agricultural \| Substandard
Credit Quality Information [Abstract]
Current fiscal year	0	0
Fiscal year before current fiscal year	141	0
Two years before current fiscal year	966	371
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	1,081	1,175
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	2,188	1,546
Real Estate Loan \| Commercial And Multifamily Portfolio Segment
Credit Quality Information [Abstract]
Current fiscal year	150,225	189,294
Fiscal year before current fiscal year	235,608	686,704
Two years before current fiscal year	719,347	550,570
Three years before current fiscal year	545,144	319,254
Four years before current fiscal year	306,238	241,661
Prior	821,725	716,350
Revolving Loans	0	0
Current period gross writeoffs, current fiscal year	0	0
Current period gross writeoffs, fiscal year before current fiscal year	0	0
Current period gross writeoffs, two year before current fiscal year	151	0
Current period gross writeoffs, three year before current fiscal year	0	0
Current period gross writeoffs, four year before current fiscal year	0	25
Current period gross writeoffs, prior	300	0
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	2,778,287	2,703,833
Current period gross writeoffs, total loans receivables	451	25
Real Estate Loan \| Commercial And Multifamily Portfolio Segment \| Pass
Credit Quality Information [Abstract]
Current fiscal year	149,862	185,628
Fiscal year before current fiscal year	235,559	680,099
Two years before current fiscal year	711,647	548,733
Three years before current fiscal year	542,617	317,075
Four years before current fiscal year	305,947	239,323
Prior	806,776	701,464
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	2,752,408	2,672,322
Real Estate Loan \| Commercial And Multifamily Portfolio Segment \| Special Mention
Credit Quality Information [Abstract]
Current fiscal year	363	3,666
Fiscal year before current fiscal year	0	2,706
Two years before current fiscal year	4,174	1,317
Three years before current fiscal year	2,051	2,159
Four years before current fiscal year	291	1,563
Prior	7,367	7,778
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	14,246	19,189
Real Estate Loan \| Commercial And Multifamily Portfolio Segment \| Substandard
Credit Quality Information [Abstract]
Current fiscal year	0	0
Fiscal year before current fiscal year	49	3,899
Two years before current fiscal year	3,526	520
Three years before current fiscal year	476	20
Four years before current fiscal year	0	775
Prior	7,582	7,108
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	11,633	12,322
1-4 Family \| Real Estate Loan
Credit Quality Information [Abstract]
Current fiscal year	38,634	66,271
Fiscal year before current fiscal year	39,414	98,721
Two years before current fiscal year	77,388	82,729
Three years before current fiscal year	79,578	73,469
Four years before current fiscal year	66,708	27,142
Prior	124,983	117,926
Revolving Loans	78,637	76,211
Current period gross writeoffs, current fiscal year	0	10
Current period gross writeoffs, fiscal year before current fiscal year	36	0
Current period gross writeoffs, two year before current fiscal year	10	0
Current period gross writeoffs, three year before current fiscal year	0	0
Current period gross writeoffs, four year before current fiscal year	0	14
Current period gross writeoffs, prior	97	63
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	505,342	542,469
Current period gross writeoffs, total loans receivables	143	87
1-4 Family \| Real Estate Loan \| Pass
Credit Quality Information [Abstract]
Current fiscal year	38,471	66,119
Fiscal year before current fiscal year	38,789	96,995
Two years before current fiscal year	76,277	79,085
Three years before current fiscal year	78,970	73,073
Four years before current fiscal year	65,886	26,854
Prior	117,084	105,257
Revolving Loans	77,910	75,700
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	493,387	523,083
1-4 Family \| Real Estate Loan \| Special Mention
Credit Quality Information [Abstract]
Current fiscal year	0	0
Fiscal year before current fiscal year	0	967
Two years before current fiscal year	207	3,184
Three years before current fiscal year	77	0
Four years before current fiscal year	0	0
Prior	562	3,804
Revolving Loans	88	10
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	934	7,965
1-4 Family \| Real Estate Loan \| Substandard
Credit Quality Information [Abstract]
Current fiscal year	163	152
Fiscal year before current fiscal year	625	759
Two years before current fiscal year	904	460
Three years before current fiscal year	531	396
Four years before current fiscal year	822	288
Prior	7,337	8,865
Revolving Loans	639	501
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	$ 11,021	$ 11,421

Loans and Allowance for Credit Losses - Credit Risk Profile of Loan Portfolio on Amortized Cost Basis Based on Risk Rating Category (Details) - USD ($)
$ in Thousands