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Loans and Allowance for Credit Losses - Loan Portfolio Aging Analysis (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Loans Receivable Aging Analysis [Abstract]
Total Past Due	$ 4,719,823	$ 3,992,775
Total Loans Receivable	4,720,290	3,995,523
Total Loans> 90 Days and Accruing	0	0
Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	3,234,509	2,789,843
Total Loans> 90 Days and Accruing	0	0
Real Estate Loan | 1-4 Family
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	436,625	400,313
Construction and Land Development | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	142,801	145,118
Total Loans> 90 Days and Accruing	0	0
Agricultural | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	360,424	279,272
Total Loans> 90 Days and Accruing	0	0
Residential Properties | Real Estate Loan | 1-4 Family
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	436,625	400,313
Total Loans> 90 Days and Accruing	0	0
Residential Properties | Real Estate Loan | Multifamily
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	298,321	298,942
Total Loans> 90 Days and Accruing	0	0
Commercial | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,996,338	1,666,198
Total Loans> 90 Days and Accruing	0	0
Agricultural Loans
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	160,511	151,484
Total Loans> 90 Days and Accruing	0	0
Commercial and Industrial Loans
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,064,033	832,008
Total Loans> 90 Days and Accruing	0	0
Consumer Loans
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	100,783	78,442
Total Loans> 90 Days and Accruing	0	0
All Other Loans
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	160,454	143,746
Total Loans> 90 Days and Accruing	0	0
Financial Asset, 30 to 59 Days Past Due
Loans Receivable Aging Analysis [Abstract]
Total Past Due	5,358	14,244
Financial Asset, 30 to 59 Days Past Due | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	4,713	11,621
Financial Asset, 30 to 59 Days Past Due | Construction and Land Development | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	340	159
Financial Asset, 30 to 59 Days Past Due | Agricultural | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	393	0
Financial Asset, 30 to 59 Days Past Due | Residential Properties | Real Estate Loan | 1-4 Family
Loans Receivable Aging Analysis [Abstract]
Total Past Due	2,808	2,532
Financial Asset, 30 to 59 Days Past Due | Residential Properties | Real Estate Loan | Multifamily
Loans Receivable Aging Analysis [Abstract]
Total Past Due	0	0
Financial Asset, 30 to 59 Days Past Due | Commercial | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	1,172	8,930
Financial Asset, 30 to 59 Days Past Due | Agricultural Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	82	0
Financial Asset, 30 to 59 Days Past Due | Commercial and Industrial Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	300	381
Financial Asset, 30 to 59 Days Past Due | Consumer Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	263	388
Financial Asset, 30 to 59 Days Past Due | All Other Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	0	1,854
Financial Asset, 60 to 89 Days Past Due
Loans Receivable Aging Analysis [Abstract]
Total Past Due	1,592	2,334
Financial Asset, 60 to 89 Days Past Due | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	735	1,975
Financial Asset, 60 to 89 Days Past Due | Construction and Land Development | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	0	199
Financial Asset, 60 to 89 Days Past Due | Agricultural | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	0	222
Financial Asset, 60 to 89 Days Past Due | Residential Properties | Real Estate Loan | 1-4 Family
Loans Receivable Aging Analysis [Abstract]
Total Past Due	537	914
Financial Asset, 60 to 89 Days Past Due | Residential Properties | Real Estate Loan | Multifamily
Loans Receivable Aging Analysis [Abstract]
Total Past Due	0	0
Financial Asset, 60 to 89 Days Past Due | Commercial | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	198	640
Financial Asset, 60 to 89 Days Past Due | Agricultural Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	0	10
Financial Asset, 60 to 89 Days Past Due | Commercial and Industrial Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	642	302
Financial Asset, 60 to 89 Days Past Due | Consumer Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	215	47
Financial Asset, 60 to 89 Days Past Due | All Other Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due
Loans Receivable Aging Analysis [Abstract]
Total Past Due	9,256	8,238
Financial Asset, Equal to or Greater than 90 Days Past Due | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	6,835	6,376
Financial Asset, Equal to or Greater than 90 Days Past Due | Construction and Land Development | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	449	203
Financial Asset, Equal to or Greater than 90 Days Past Due | Agricultural | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	242	1
Financial Asset, Equal to or Greater than 90 Days Past Due | Residential Properties | Real Estate Loan | 1-4 Family
Loans Receivable Aging Analysis [Abstract]
Total Past Due	819	2,012
Financial Asset, Equal to or Greater than 90 Days Past Due | Residential Properties | Real Estate Loan | Multifamily
Loans Receivable Aging Analysis [Abstract]
Total Past Due	546	1,676
Financial Asset, Equal to or Greater than 90 Days Past Due | Commercial | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	4,779	2,484
Financial Asset, Equal to or Greater than 90 Days Past Due | Agricultural Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	881	588
Financial Asset, Equal to or Greater than 90 Days Past Due | Commercial and Industrial Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	1,221	1,156
Financial Asset, Equal to or Greater than 90 Days Past Due | Consumer Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	319	118
Financial Asset, Equal to or Greater than 90 Days Past Due | All Other Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	0	0
Total Past Due
Loans Receivable Aging Analysis [Abstract]
Total Past Due	16,206	24,816
Total Past Due | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	12,283	19,972
Total Past Due | Construction and Land Development | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	789	561
Total Past Due | Agricultural | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	635	223
Total Past Due | Residential Properties | Real Estate Loan | 1-4 Family
Loans Receivable Aging Analysis [Abstract]
Total Past Due	4,164	5,458
Total Past Due | Residential Properties | Real Estate Loan | Multifamily
Loans Receivable Aging Analysis [Abstract]
Total Past Due	546	1,676
Total Past Due | Commercial | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	6,149	12,054
Total Past Due | Agricultural Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	963	598
Total Past Due | Commercial and Industrial Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	2,163	1,839
Total Past Due | Consumer Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	797	553
Total Past Due | All Other Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	0	1,854
Current
Loans Receivable Aging Analysis [Abstract]
Total Past Due	4,704,084	3,970,707
Current | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	3,222,226	2,769,871
Current | Construction and Land Development | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	142,012	144,557
Current | Agricultural | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	359,789	279,049
Current | Residential Properties | Real Estate Loan | 1-4 Family
Loans Receivable Aging Analysis [Abstract]
Total Past Due	432,461	394,855
Current | Residential Properties | Real Estate Loan | Multifamily
Loans Receivable Aging Analysis [Abstract]
Total Past Due	297,775	297,266
Current | Commercial | Real Estate Loan
Loans Receivable Aging Analysis [Abstract]
Total Past Due	1,990,189	1,654,144
Current | Agricultural Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	159,548	150,886
Current | Commercial and Industrial Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	1,061,870	830,169
Current | Consumer Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	99,986	77,889
Current | All Other Loans
Loans Receivable Aging Analysis [Abstract]
Total Past Due	$ 160,454	$ 141,892

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