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, 2023	Dec. 31, 2022
Credit Quality Information [Abstract]
Current fiscal year	$ 629,933	$ 1,535,342
Fiscal year before current fiscal year	1,492,232	973,016
Two years before current fiscal year	1,069,403	669,475
Three years before current fiscal year	660,141	387,967
Four years before current fiscal year	403,520	354,435
Prior	1,213,373	862,255
Revolving Loans	71,463	43,722
Current period gross writeoffs, current fiscal year	0	311
Current period gross writeoffs, fiscal year before current fiscal year	333	603
Current period gross writeoffs, two year before current fiscal year	83	195
Current period gross writeoffs, three year before current fiscal year	50	462
Current period gross writeoffs, four year before current fiscal year	62	30
Current period gross writeoffs, prior	1,053	1,349
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	5,540,065	4,826,212
Current period gross writeoffs, total loans receivables	1,581	2,950
Pass
Credit Quality Information [Abstract]
Current fiscal year	625,828	1,524,905
Fiscal year before current fiscal year	1,480,981	969,145
Two years before current fiscal year	1,050,906	656,609
Three years before current fiscal year	649,637	382,543
Four years before current fiscal year	398,814	335,886
Prior	1,158,180	832,814
Revolving Loans	71,412	43,722
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	5,435,758	4,745,624
Special Mention
Credit Quality Information [Abstract]
Current fiscal year	3,965	5,126
Fiscal year before current fiscal year	5,245	2,163
Two years before current fiscal year	15,910	11,356
Three years before current fiscal year	9,836	4,118
Four years before current fiscal year	3,446	8,814
Prior	35,320	12,891
Revolving Loans	10	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	73,732	44,468
Substandard
Credit Quality Information [Abstract]
Current fiscal year	140	5,311
Fiscal year before current fiscal year	6,006	1,708
Two years before current fiscal year	2,587	1,510
Three years before current fiscal year	668	1,306
Four years before current fiscal year	1,260	9,735
Prior	19,873	16,550
Revolving Loans	41	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	30,575	36,120
Agricultural Loans
Credit Quality Information [Abstract]
Current fiscal year	113,700	138,558
Fiscal year before current fiscal year	40,541	18,783
Two years before current fiscal year	16,473	3,433
Three years before current fiscal year	4,355	4,720
Four years before current fiscal year	1,979	981
Prior	2,399	363
Revolving Loans	0	0
Current period gross writeoffs, current fiscal year	0	0
Current period gross writeoffs, fiscal year before current fiscal year	276	93
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	132	0
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	179,447	166,838
Current period gross writeoffs, total loans receivables	408	93
Agricultural Loans \| Pass
Credit Quality Information [Abstract]
Current fiscal year	113,694	137,327
Fiscal year before current fiscal year	40,523	18,783
Two years before current fiscal year	16,470	3,433
Three years before current fiscal year	4,355	3,918
Four years before current fiscal year	1,961	915
Prior	2,399	254
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	179,402	164,630
Agricultural Loans \| Special Mention
Credit Quality Information [Abstract]
Current fiscal year	6	1,178
Fiscal year before current fiscal year	18	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	756
Four years before current fiscal year	15	66
Prior	0	109
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	39	2,109
Agricultural Loans \| Substandard
Credit Quality Information [Abstract]
Current fiscal year	0	53
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	3	0
Three years before current fiscal year	0	46
Four years before current fiscal year	3	0
Prior	0	0
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	6	99
Commercial Industrial And Other Portfolio Segment
Credit Quality Information [Abstract]
Current fiscal year	243,750	450,816
Fiscal year before current fiscal year	323,945	227,096
Two years before current fiscal year	253,290	182,487
Three years before current fiscal year	162,159	64,511
Four years before current fiscal year	87,402	69,366
Prior	349,890	248,195
Revolving Loans	0	0
Current period gross writeoffs, current fiscal year	0	39
Current period gross writeoffs, fiscal year before current fiscal year	0	311
Current period gross writeoffs, two year before current fiscal year	0	39
Current period gross writeoffs, three year before current fiscal year	49	439
Current period gross writeoffs, four year before current fiscal year	0	23
Current period gross writeoffs, prior	13	19
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,420,436	1,242,471
Current period gross writeoffs, total loans receivables	62	870
Commercial Industrial And Other Portfolio Segment \| Pass
Credit Quality Information [Abstract]
Current fiscal year	243,700	450,001
Fiscal year before current fiscal year	321,790	226,038
Two years before current fiscal year	241,780	172,208
Three years before current fiscal year	154,578	63,906
Four years before current fiscal year	86,721	61,929
Prior	327,485	247,404
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,376,054	1,221,486
Commercial Industrial And Other Portfolio Segment \| Special Mention
Credit Quality Information [Abstract]
Current fiscal year	50	469
Fiscal year before current fiscal year	1,634	640
Two years before current fiscal year	10,634	10,095
Three years before current fiscal year	7,510	570
Four years before current fiscal year	647	7,280
Prior	21,563	158
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	42,038	19,212
Commercial Industrial And Other Portfolio Segment \| Substandard
Credit Quality Information [Abstract]
Current fiscal year	0	346
Fiscal year before current fiscal year	521	418
Two years before current fiscal year	876	184
Three years before current fiscal year	71	35
Four years before current fiscal year	34	157
Prior	842	633
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	2,344	1,773
Consumer Loans
Credit Quality Information [Abstract]
Current fiscal year	8,973	48,669
Fiscal year before current fiscal year	45,278	21,352
Two years before current fiscal year	24,506	12,105
Three years before current fiscal year	12,325	8,011
Four years before current fiscal year	5,488	2,002
Prior	2,972	5,636
Revolving Loans	0	0
Current period gross writeoffs, current fiscal year	0	22
Current period gross writeoffs, fiscal year before current fiscal year	57	177
Current period gross writeoffs, two year before current fiscal year	83	89
Current period gross writeoffs, three year before current fiscal year	1	10
Current period gross writeoffs, four year before current fiscal year	9	7
Current period gross writeoffs, prior	845	1,075
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	99,542	97,775
Current period gross writeoffs, total loans receivables	995	1,380
Consumer Loans \| Pass
Credit Quality Information [Abstract]
Current fiscal year	8,929	48,600
Fiscal year before current fiscal year	44,835	21,088
Two years before current fiscal year	24,253	12,101
Three years before current fiscal year	12,165	7,968
Four years before current fiscal year	5,427	1,945
Prior	2,930	5,630
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	98,539	97,332
Consumer Loans \| Special Mention
Credit Quality Information [Abstract]
Current fiscal year	0	0
Fiscal year before current fiscal year	9	18
Two years before current fiscal year	0	1
Three years before current fiscal year	0	0
Four years before current fiscal year	0	5
Prior	0	0
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	9	24
Consumer Loans \| Substandard
Credit Quality Information [Abstract]
Current fiscal year	44	69
Fiscal year before current fiscal year	434	246
Two years before current fiscal year	253	3
Three years before current fiscal year	160	43
Four years before current fiscal year	61	52
Prior	42	6
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	994	419
Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	3,840,640	3,319,128
Real Estate Loan \| Construction and Land Development
Credit Quality Information [Abstract]
Current fiscal year	49,485	63,846
Fiscal year before current fiscal year	78,795	39,790
Two years before current fiscal year	29,330	12,558
Three years before current fiscal year	6,101	15,801
Four years before current fiscal year	10,218	1,210
Prior	15,277	11,059
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		2
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	189,206	144,264
Current period gross writeoffs, total loans receivables	14	2
Real Estate Loan \| Construction and Land Development \| Pass
Credit Quality Information [Abstract]
Current fiscal year	49,485	63,846
Fiscal year before current fiscal year	78,795	39,790
Two years before current fiscal year	29,330	12,558
Three years before current fiscal year	6,101	15,787
Four years before current fiscal year	10,218	1,210
Prior	14,834	10,601
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	188,763	143,792
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	0	0
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	0	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	0	0
Three years before current fiscal year	0	14
Four years before current fiscal year	0	0
Prior	443	458
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	443	472
Real Estate Loan \| Agricultural
Credit Quality Information [Abstract]
Current fiscal year	12,474	172,956
Fiscal year before current fiscal year	172,028	67,115
Two years before current fiscal year	59,717	58,773
Three years before current fiscal year	56,006	25,060
Four years before current fiscal year	22,284	29,229
Prior	77,325	57,194
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	399,834	410,327
Current period gross writeoffs, total loans receivables	0	0
Real Estate Loan \| Agricultural \| Pass
Credit Quality Information [Abstract]
Current fiscal year	12,265	171,833
Fiscal year before current fiscal year	172,028	67,115
Two years before current fiscal year	58,648	58,283
Three years before current fiscal year	56,006	23,820
Four years before current fiscal year	21,114	27,573
Prior	74,179	52,799
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	394,240	401,423
Real Estate Loan \| Agricultural \| Special Mention
Credit Quality Information [Abstract]
Current fiscal year	209	1,123
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	694	490
Three years before current fiscal year	0	1,240
Four years before current fiscal year	1,170	273
Prior	1,945	3,121
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	4,018	6,247
Real Estate Loan \| Agricultural \| Substandard
Credit Quality Information [Abstract]
Current fiscal year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	375	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	1,383
Prior	1,201	1,274
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,576	2,657
Real Estate Loan \| Commercial And Multifamily Portfolio Segment
Credit Quality Information [Abstract]
Current fiscal year	161,227	564,891
Fiscal year before current fiscal year	728,921	511,379
Two years before current fiscal year	580,701	320,612
Three years before current fiscal year	338,421	241,945
Four years before current fiscal year	248,302	217,851
Prior	662,329	467,679
Revolving Loans		0
Current period gross writeoffs, current fiscal year	0	250
Current period gross writeoffs, fiscal year before current fiscal year	0	22
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	142
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	2,719,901	2,324,357
Current period gross writeoffs, total loans receivables	25	414
Real Estate Loan \| Commercial And Multifamily Portfolio Segment \| Pass
Credit Quality Information [Abstract]
Current fiscal year	157,527	558,921
Fiscal year before current fiscal year	721,955	509,614
Two years before current fiscal year	578,816	319,049
Three years before current fiscal year	336,064	239,564
Four years before current fiscal year	245,896	211,505
Prior	645,950	453,076
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	2,686,208	2,291,729
Real Estate Loan \| Commercial And Multifamily Portfolio Segment \| Special Mention
Credit Quality Information [Abstract]
Current fiscal year	3,700	2,187
Fiscal year before current fiscal year	2,735	1,287
Two years before current fiscal year	1,348	769
Three years before current fiscal year	2,326	1,508
Four years before current fiscal year	1,614	952
Prior	7,987	8,503
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	19,710	15,206
Real Estate Loan \| Commercial And Multifamily Portfolio Segment \| Substandard
Credit Quality Information [Abstract]
Current fiscal year	0	3,783
Fiscal year before current fiscal year	4,231	478
Two years before current fiscal year	537	794
Three years before current fiscal year	31	873
Four years before current fiscal year	792	5,394
Prior	8,392	6,100
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	13,983	17,422
1-4 Family \| Real Estate Loan
Credit Quality Information [Abstract]
Current fiscal year	40,324	95,606
Fiscal year before current fiscal year	102,724	87,501
Two years before current fiscal year	105,386	79,507
Three years before current fiscal year	80,774	27,919
Four years before current fiscal year	27,847	33,796
Prior	103,181	72,129
Revolving Loans	71,463	43,722
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	67
Current period gross writeoffs, three year before current fiscal year	0	13
Current period gross writeoffs, four year before current fiscal year	14	0
Current period gross writeoffs, prior	63	111
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	531,699	440,180
Current period gross writeoffs, total loans receivables	77	191
1-4 Family \| Real Estate Loan \| Pass
Credit Quality Information [Abstract]
Current fiscal year	40,228	94,377
Fiscal year before current fiscal year	101,055	86,717
Two years before current fiscal year	101,609	78,977
Three years before current fiscal year	80,368	27,580
Four years before current fiscal year	27,477	30,809
Prior	90,403	63,050
Revolving Loans	71,412	43,722
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	512,552	425,232
1-4 Family \| Real Estate Loan \| Special Mention
Credit Quality Information [Abstract]
Current fiscal year	0	169
Fiscal year before current fiscal year	849	218
Two years before current fiscal year	3,234	1
Three years before current fiscal year	0	44
Four years before current fiscal year	0	238
Prior	3,825	1,000
Revolving Loans	10	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	7,918	1,670
1-4 Family \| Real Estate Loan \| Substandard
Credit Quality Information [Abstract]
Current fiscal year	96	1,060
Fiscal year before current fiscal year	820	566
Two years before current fiscal year	543	529
Three years before current fiscal year	406	295
Four years before current fiscal year	370	2,749
Prior	8,953	8,079
Revolving Loans	41	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	$ 11,229	$ 13,278

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