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	Jun. 30, 2024	Dec. 31, 2023
Credit Quality Information [Abstract]
Current fiscal year	$ 355,444	$ 792,071
Fiscal year before current fiscal year	721,318	1,402,051
Two years before current fiscal year	1,343,501	994,108
Three years before current fiscal year	978,481	619,354
Four years before current fiscal year	595,314	381,174
Prior	1,492,655	1,315,596
Revolving Loans	73,904	76,211
Current period gross writeoffs, current fiscal year	0	10
Current period gross writeoffs, fiscal year before current fiscal year	165	761
Current period gross writeoffs, two year before current fiscal year	413	208
Current period gross writeoffs, three year before current fiscal year	543	51
Current period gross writeoffs, four year before current fiscal year	30	93
Current period gross writeoffs, prior	653	1,508
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	5,560,617	5,580,565
Current period gross writeoffs, total loans receivables	1,804	2,631
Pass
Credit Quality Information [Abstract]
Current fiscal year	353,129	786,908
Fiscal year before current fiscal year	719,798	1,390,885
Two years before current fiscal year	1,334,374	976,531
Three years before current fiscal year	968,401	616,020
Four years before current fiscal year	592,600	376,655
Prior	1,461,143	1,254,871
Revolving Loans	72,811	75,700
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	5,502,256	5,477,570
Special Mention
Credit Quality Information [Abstract]
Current fiscal year	2,171	4,925
Fiscal year before current fiscal year	1,233	5,566
Two years before current fiscal year	4,079	15,110
Three years before current fiscal year	8,383	2,721
Four years before current fiscal year	1,721	3,368
Prior	13,180	42,350
Revolving Loans	0	10
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	30,767	74,050
Substandard
Credit Quality Information [Abstract]
Current fiscal year	144	238
Fiscal year before current fiscal year	287	5,600
Two years before current fiscal year	5,048	2,467
Three years before current fiscal year	1,697	613
Four years before current fiscal year	993	1,151
Prior	18,332	18,375
Revolving Loans	1,093	501
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	27,594	28,945
Agricultural Loans
Credit Quality Information [Abstract]
Current fiscal year	80,821	147,999
Fiscal year before current fiscal year	83,731	27,905
Two years before current fiscal year	27,360	10,044
Three years before current fiscal year	16,109	2,549
Four years before current fiscal year	3,202	1,921
Prior	2,774	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	213,997	196,272
Current period gross writeoffs, total loans receivables	261	408
Agricultural Loans \| Pass
Credit Quality Information [Abstract]
Current fiscal year	80,406	147,993
Fiscal year before current fiscal year	83,720	27,895
Two years before current fiscal year	27,310	10,044
Three years before current fiscal year	16,109	2,549
Four years before current fiscal year	3,202	1,883
Prior	2,387	5,854
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	213,134	196,218
Agricultural Loans \| Special Mention
Credit Quality Information [Abstract]
Current fiscal year	415	6
Fiscal year before current fiscal year	11	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	371	0
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	797	54
Agricultural Loans \| Substandard
Credit Quality Information [Abstract]
Current fiscal year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	50	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	16	0
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	66	0
Commercial Industrial And Other Portfolio Segment
Credit Quality Information [Abstract]
Current fiscal year	124,679	291,351
Fiscal year before current fiscal year	269,155	309,188
Two years before current fiscal year	285,454	242,971
Three years before current fiscal year	228,045	155,119
Four years before current fiscal year	144,241	74,532
Prior	392,883	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	206	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	1,444,457	1,450,768
Current period gross writeoffs, total loans receivables	642	529
Commercial Industrial And Other Portfolio Segment \| Pass
Credit Quality Information [Abstract]
Current fiscal year	124,458	290,304
Fiscal year before current fiscal year	268,023	306,794
Two years before current fiscal year	284,063	232,198
Three years before current fiscal year	221,470	154,499
Four years before current fiscal year	142,785	73,906
Prior	389,153	347,957
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,429,952	1,405,658
Commercial Industrial And Other Portfolio Segment \| Special Mention
Credit Quality Information [Abstract]
Current fiscal year	221	1,047
Fiscal year before current fiscal year	1,023	1,857
Two years before current fiscal year	1,190	9,982
Three years before current fiscal year	6,365	562
Four years before current fiscal year	1,426	597
Prior	3,077	28,900
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	13,302	42,945
Commercial Industrial And Other Portfolio Segment \| Substandard
Credit Quality Information [Abstract]
Current fiscal year	0	0
Fiscal year before current fiscal year	109	537
Two years before current fiscal year	201	791
Three years before current fiscal year	210	58
Four years before current fiscal year	30	29
Prior	653	750
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,203	2,165
Consumer Loans
Credit Quality Information [Abstract]
Current fiscal year	3,310	9,633
Fiscal year before current fiscal year	7,017	40,656
Two years before current fiscal year	32,191	21,589
Three years before current fiscal year	15,705	10,526
Four years before current fiscal year	7,002	4,534
Prior	5,616	4,076
Revolving Loans	0	0
Current period gross writeoffs, current fiscal year	0	22
Current period gross writeoffs, fiscal year before current fiscal year	18	177
Current period gross writeoffs, two year before current fiscal year	97	89
Current period gross writeoffs, three year before current fiscal year	113	10
Current period gross writeoffs, four year before current fiscal year	20	7
Current period gross writeoffs, prior	552	1,075
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	70,841	91,014
Current period gross writeoffs, total loans receivables	800	1,380
Consumer Loans \| Pass
Credit Quality Information [Abstract]
Current fiscal year	3,310	9,547
Fiscal year before current fiscal year	6,963	40,225
Two years before current fiscal year	31,916	21,264
Three years before current fiscal year	15,509	10,387
Four years before current fiscal year	6,876	4,475
Prior	5,572	4,035
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	70,146	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	20	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	20	26
Consumer Loans \| Substandard
Credit Quality Information [Abstract]
Current fiscal year	0	86
Fiscal year before current fiscal year	54	405
Two years before current fiscal year	255	325
Three years before current fiscal year	196	139
Four years before current fiscal year	126	59
Prior	44	41
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	675	1,055
Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	3,831,322	3,842,511
Real Estate Loan \| Construction and Land Development
Credit Quality Information [Abstract]
Current fiscal year	25,088	68,086
Fiscal year before current fiscal year	97,041	74,065
Two years before current fiscal year	28,802	27,392
Three years before current fiscal year	16,349	5,188
Four years before current fiscal year	5,124	10,795
Prior	22,985	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	195,389	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	25,088	68,086
Fiscal year before current fiscal year	97,041	74,065
Two years before current fiscal year	28,796	27,392
Three years before current fiscal year	16,349	5,188
Four years before current fiscal year	5,124	10,795
Prior	22,568	19,115
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	194,966	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	401	0
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	401	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	16	436
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	22	436
Real Estate Loan \| Agricultural
Credit Quality Information [Abstract]
Current fiscal year	14,559	19,437
Fiscal year before current fiscal year	18,677	164,812
Two years before current fiscal year	161,004	58,813
Three years before current fiscal year	56,176	53,249
Four years before current fiscal year	51,641	20,589
Prior	84,958	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	387,015	391,132
Current period gross writeoffs, total loans receivables	0	0
Real Estate Loan \| Agricultural \| Pass
Credit Quality Information [Abstract]
Current fiscal year	13,389	19,231
Fiscal year before current fiscal year	18,478	164,812
Two years before current fiscal year	161,004	57,815
Three years before current fiscal year	55,184	53,249
Four years before current fiscal year	51,641	19,419
Prior	82,032	71,189
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	381,728	385,715
Real Estate Loan \| Agricultural \| Special Mention
Credit Quality Information [Abstract]
Current fiscal year	1,170	206
Fiscal year before current fiscal year	199	0
Two years before current fiscal year	0	627
Three years before current fiscal year	628	0
Four years before current fiscal year	0	1,170
Prior	1,864	1,868
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	3,861	3,871
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	0	371
Three years before current fiscal year	364	0
Four years before current fiscal year	0	0
Prior	1,062	1,175
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,426	1,546
Real Estate Loan \| Commercial And Multifamily Portfolio Segment
Credit Quality Information [Abstract]
Current fiscal year	81,514	189,294
Fiscal year before current fiscal year	204,555	686,704
Two years before current fiscal year	729,451	550,570
Three years before current fiscal year	562,811	319,254
Four years before current fiscal year	315,151	241,661
Prior	847,919	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	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	25
Current period gross writeoffs, prior	0	0
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	2,741,401	2,703,833
Current period gross writeoffs, total loans receivables	0	25
Real Estate Loan \| Commercial And Multifamily Portfolio Segment \| Pass
Credit Quality Information [Abstract]
Current fiscal year	81,149	185,628
Fiscal year before current fiscal year	204,555	680,099
Two years before current fiscal year	723,001	548,733
Three years before current fiscal year	561,064	317,075
Four years before current fiscal year	314,856	239,323
Prior	832,804	701,464
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	2,717,429	2,672,322
Real Estate Loan \| Commercial And Multifamily Portfolio Segment \| Special Mention
Credit Quality Information [Abstract]
Current fiscal year	365	3,666
Fiscal year before current fiscal year	0	2,706
Two years before current fiscal year	2,657	1,317
Three years before current fiscal year	1,313	2,159
Four years before current fiscal year	295	1,563
Prior	6,887	7,778
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	11,517	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	0	3,899
Two years before current fiscal year	3,793	520
Three years before current fiscal year	434	20
Four years before current fiscal year	0	775
Prior	8,228	7,108
Revolving Loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	12,455	12,322
1-4 Family \| Real Estate Loan
Credit Quality Information [Abstract]
Current fiscal year	25,473	66,271
Fiscal year before current fiscal year	41,142	98,721
Two years before current fiscal year	79,239	82,729
Three years before current fiscal year	83,286	73,469
Four years before current fiscal year	68,953	27,142
Prior	135,520	117,926
Revolving Loans	73,904	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	55	63
Current period gross writeoffs, revolving loans	0	0
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	507,517	542,469
Current period gross writeoffs, total loans receivables	101	87
1-4 Family \| Real Estate Loan \| Pass
Credit Quality Information [Abstract]
Current fiscal year	25,329	66,119
Fiscal year before current fiscal year	41,018	96,995
Two years before current fiscal year	78,284	79,085
Three years before current fiscal year	82,716	73,073
Four years before current fiscal year	68,116	26,854
Prior	126,627	105,257
Revolving Loans	72,811	75,700
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	494,901	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	212	3,184
Three years before current fiscal year	77	0
Four years before current fiscal year	0	0
Prior	580	3,804
Revolving Loans	0	10
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	869	7,965
1-4 Family \| Real Estate Loan \| Substandard
Credit Quality Information [Abstract]
Current fiscal year	144	152
Fiscal year before current fiscal year	124	759
Two years before current fiscal year	743	460
Three years before current fiscal year	493	396
Four years before current fiscal year	837	288
Prior	8,313	8,865
Revolving Loans	1,093	501
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	$ 11,747	$ 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