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Loans and Allowance for Credit Losses - Risk Grade by Category of Loan and Year of Origination/Renewal (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Financing Receivable Impaired [Line Items]    
2024 $ 2,249,973  
2023 3,143,320  
2022 5,113,240  
2021 3,889,854  
2020 2,126,874  
Prior 3,958,738  
Revolving Loans 1,811,762  
Revolving Loans Converted to Term Loans 27,054  
Total loans 22,320,815 $ 21,180,538
Current-period gross write-offs, 2024 2,649  
Current-period gross write-offs, 2023 139  
Current-period gross write-offs, 2022 1,745  
Current-period gross write-offs, 2021 1,384  
Current-period gross write-offs, 2020 1,354  
Current-period gross write-offs, Prior 756  
Current-period gross write-offs, Revolving Loans 1,691  
Current-period gross write-offs, Total 9,718  
PCD Loans [Member]    
Financing Receivable Impaired [Line Items]    
2024 23,889  
2023 78,047  
2022 163,555  
2021 54,346  
2020 37,915  
Prior 82,675  
Revolving Loans 60,564  
Revolving Loans Converted to Term Loans 1,737  
Total loans 502,728  
Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
Total loans 1,037,361 816,043
Warehouse Purchase Program [Member]    
Financing Receivable Impaired [Line Items]    
2024 1,081,403  
Total loans 1,081,403 822,245
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Financing Receivable Impaired [Line Items]    
2024 283,264  
2023 827,410  
2022 843,814  
2021 390,734  
2020 217,399  
Prior 99,424  
Revolving Loans 150,347  
Revolving Loans Converted to Term Loans 15,980  
Total loans 2,828,372 3,076,591
Current-period gross write-offs, 2022 109  
Current-period gross write-offs, Total 109  
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | PCD Loans [Member]    
Financing Receivable Impaired [Line Items]    
2024 2,736  
2023 25,624  
2022 74,957  
2021 7,805  
2020 4,725  
Prior 7,456  
Revolving Loans 20,438  
Total loans 143,741  
Real Estate [Member] | Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
2024 141,562  
2023 167,875  
2022 220,947  
2021 120,594  
2020 72,993  
Prior 129,154  
Revolving Loans 183,726  
Revolving Loans Converted to Term Loans 510  
Total loans 1,037,361  
Current-period gross write-offs, 2021 62  
Current-period gross write-offs, 2020 339  
Current-period gross write-offs, Prior 121  
Current-period gross write-offs, Total 522  
Real Estate [Member] | Agriculture [Member] | PCD Loans [Member]    
Financing Receivable Impaired [Line Items]    
2024 17,467  
2023 2,064  
2022 3,464  
2021 2,052  
2020 15,330  
Prior 2,457  
Revolving Loans 17,231  
Total loans 60,065  
Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Impaired [Line Items]    
2024 237,920  
2023 1,234,527  
2022 2,367,369  
2021 2,155,085  
2020 1,008,556  
Prior 1,327,648  
Revolving Loans 93,928  
Revolving Loans Converted to Term Loans 1,880  
Total loans [1] 8,426,913 8,168,078
Current-period gross write-offs, 2023 44  
Current-period gross write-offs, 2022 719  
Current-period gross write-offs, 2021 28  
Current-period gross write-offs, 2020 33  
Current-period gross write-offs, Prior 70  
Current-period gross write-offs, Total 894  
Real Estate [Member] | 1-4 Family [Member] | PCD Loans [Member]    
Financing Receivable Impaired [Line Items]    
2024 358  
2023 1,780  
2022 2,476  
2021 652  
2020 520  
Prior 1,872  
Total loans 7,658  
Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Financing Receivable Impaired [Line Items]    
2024 147,570  
2023 575,630  
2022 1,310,292  
2021 1,023,830  
2020 727,340  
Prior 2,105,823  
Revolving Loans 68,613  
Revolving Loans Converted to Term Loans 2,786  
Total loans 5,961,884 5,662,948
Current-period gross write-offs, 2022 135  
Current-period gross write-offs, 2021 216  
Current-period gross write-offs, Prior 160  
Current-period gross write-offs, Total 511  
Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member] | PCD Loans [Member]    
Financing Receivable Impaired [Line Items]    
2024 2,183  
2023 45,824  
2022 68,714  
2021 41,362  
2020 17,130  
Prior 68,593  
Revolving Loans 329  
Total loans 244,135  
Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
2024 303,915  
2023 274,429  
2022 314,895  
2021 171,707  
2020 73,034  
Prior 271,724  
Revolving Loans 1,228,843  
Revolving Loans Converted to Term Loans 5,724  
Total loans 2,644,271 2,305,040
Current-period gross write-offs, 2023 70  
Current-period gross write-offs, 2022 728  
Current-period gross write-offs, 2021 1,054  
Current-period gross write-offs, 2020 929  
Current-period gross write-offs, Prior 126  
Current-period gross write-offs, Revolving Loans 1,629  
Current-period gross write-offs, Total 4,536  
Commercial and Industrial [Member] | PCD Loans [Member]    
Financing Receivable Impaired [Line Items]    
2024 1,145  
2023 2,755  
2022 13,944  
2021 2,444  
2020 205  
Prior 2,285  
Revolving Loans 22,550  
Revolving Loans Converted to Term Loans 1,737  
Total loans 47,065  
Consumer and Other [Member]    
Financing Receivable Impaired [Line Items]    
2024 54,339  
2023 63,449  
2022 55,923  
2021 27,904  
2020 27,552  
Prior 24,965  
Revolving Loans 86,305  
Revolving Loans Converted to Term Loans 174  
Total loans 340,611 $ 329,593
Current-period gross write-offs, 2024 2,649  
Current-period gross write-offs, 2023 25  
Current-period gross write-offs, 2022 54  
Current-period gross write-offs, 2021 24  
Current-period gross write-offs, 2020 53  
Current-period gross write-offs, Prior 279  
Current-period gross write-offs, Revolving Loans 62  
Current-period gross write-offs, Total 3,146  
Consumer and Other [Member] | PCD Loans [Member]    
Financing Receivable Impaired [Line Items]    
2021 31  
2020 5  
Prior 12  
Revolving Loans 16  
Total loans 64  
Grade 1 [Member]    
Financing Receivable Impaired [Line Items]    
2024 44,179  
2023 24,441  
2022 14,412  
2021 7,122  
2020 4,496  
Prior 9,900  
Revolving Loans 52,152  
Revolving Loans Converted to Term Loans 162  
Total loans 156,864  
Grade 1 [Member] | Real Estate [Member] | Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
2024 1,424  
2023 668  
2022 1,020  
2021 149  
2020 189  
Prior 285  
Revolving Loans 9,334  
Total loans 13,069  
Grade 1 [Member] | Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Impaired [Line Items]    
2023 74  
2022 150  
2020 108  
Total loans 332  
Grade 1 [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Financing Receivable Impaired [Line Items]    
2024 750  
Total loans 750  
Grade 1 [Member] | Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
2024 32,263  
2023 13,062  
2022 8,512  
2021 4,247  
2020 2,440  
Prior 4,755  
Revolving Loans 40,230  
Revolving Loans Converted to Term Loans 162  
Total loans 105,671  
Grade 1 [Member] | Consumer and Other [Member]    
Financing Receivable Impaired [Line Items]    
2024 9,742  
2023 10,637  
2022 4,730  
2021 2,726  
2020 1,759  
Prior 4,860  
Revolving Loans 2,588  
Total loans 37,042  
Grade 2 [Member]    
Financing Receivable Impaired [Line Items]    
2024 8,300  
2023 18,075  
2022 24,498  
2021 620  
2020 794  
Prior 10,511  
Revolving Loans 6,412  
Total loans 69,210  
Grade 2 [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Financing Receivable Impaired [Line Items]    
2023 1,096  
2022 163  
Prior 14  
Total loans 1,273  
Grade 2 [Member] | Real Estate [Member] | Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
2023 248  
2022 60  
2021 99  
Prior 703  
Total loans 1,110  
Grade 2 [Member] | Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Impaired [Line Items]    
2023 520  
2022 1,220  
2021 150  
2020 229  
Prior 2,468  
Total loans 4,587  
Grade 2 [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Financing Receivable Impaired [Line Items]    
2022 1,099  
2020 447  
Prior 2,126  
Total loans 3,672  
Grade 2 [Member] | Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
2024 1,795  
2023 3,490  
2022 7,740  
2021 330  
2020 118  
Prior 3,381  
Revolving Loans 6,405  
Total loans 23,259  
Grade 2 [Member] | Consumer and Other [Member]    
Financing Receivable Impaired [Line Items]    
2024 6,505  
2023 12,721  
2022 14,216  
2021 41  
Prior 1,819  
Revolving Loans 7  
Total loans 35,309  
Grade 3 [Member]    
Financing Receivable Impaired [Line Items]    
2024 2,107,116  
2023 2,732,894  
2022 4,344,554  
2021 3,424,122  
2020 1,676,070  
Prior 2,767,959  
Revolving Loans 1,530,919  
Revolving Loans Converted to Term Loans 17,408  
Total loans 18,601,042  
Grade 3 [Member] | Warehouse Purchase Program [Member]    
Financing Receivable Impaired [Line Items]    
2024 1,081,403  
Total loans 1,081,403  
Grade 3 [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Financing Receivable Impaired [Line Items]    
2024 266,862  
2023 699,907  
2022 597,832  
2021 295,308  
2020 125,102  
Prior 47,761  
Revolving Loans 99,061  
Revolving Loans Converted to Term Loans 10,049  
Total loans 2,141,882  
Grade 3 [Member] | Real Estate [Member] | Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
2024 111,732  
2023 136,370  
2022 195,650  
2021 91,013  
2020 53,071  
Prior 114,853  
Revolving Loans 135,023  
Revolving Loans Converted to Term Loans 107  
Total loans 837,819  
Grade 3 [Member] | Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Impaired [Line Items]    
2024 232,171  
2023 1,214,696  
2022 2,337,634  
2021 2,125,250  
2020 996,797  
Prior 1,245,564  
Revolving Loans 90,447  
Revolving Loans Converted to Term Loans 1,880  
Total loans 8,244,439  
Grade 3 [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Financing Receivable Impaired [Line Items]    
2024 138,227  
2023 432,631  
2022 949,365  
2021 744,603  
2020 431,915  
Prior 1,163,658  
Revolving Loans 52,323  
Revolving Loans Converted to Term Loans 2,786  
Total loans 3,915,508  
Grade 3 [Member] | Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
2024 238,629  
2023 210,865  
2022 227,348  
2021 143,904  
2020 58,515  
Prior 180,042  
Revolving Loans 1,073,239  
Revolving Loans Converted to Term Loans 2,412  
Total loans 2,134,954  
Grade 3 [Member] | Consumer and Other [Member]    
Financing Receivable Impaired [Line Items]    
2024 38,092  
2023 38,425  
2022 36,725  
2021 24,044  
2020 10,670  
Prior 16,081  
Revolving Loans 80,826  
Revolving Loans Converted to Term Loans 174  
Total loans 245,037  
Grade 4 [Member]    
Financing Receivable Impaired [Line Items]    
2024 64,405  
2023 280,449  
2022 514,145  
2021 376,375  
2020 340,546  
Prior 880,455  
Revolving Loans 147,451  
Revolving Loans Converted to Term Loans 7,458  
Total loans 2,611,284  
Grade 4 [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Financing Receivable Impaired [Line Items]    
2024 13,666  
2023 100,506  
2022 169,491  
2021 80,180  
2020 64,039  
Prior 27,682  
Revolving Loans 29,883  
Revolving Loans Converted to Term Loans 5,931  
Total loans 491,378  
Grade 4 [Member] | Real Estate [Member] | Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
2024 9,426  
2023 28,468  
2022 15,968  
2021 26,932  
2020 4,403  
Prior 7,956  
Revolving Loans 22,138  
Revolving Loans Converted to Term Loans 403  
Total loans 115,694  
Grade 4 [Member] | Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Impaired [Line Items]    
2024 5,391  
2023 15,839  
2022 15,636  
2021 23,121  
2020 6,049  
Prior 63,434  
Revolving Loans 3,354  
Total loans 132,824  
Grade 4 [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Financing Receivable Impaired [Line Items]    
2024 6,410  
2023 93,937  
2022 281,422  
2021 230,332  
2020 242,150  
Prior 699,644  
Revolving Loans 15,056  
Total loans 1,568,951  
Grade 4 [Member] | Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
2024 29,512  
2023 40,041  
2022 31,376  
2021 14,748  
2020 8,787  
Prior 79,560  
Revolving Loans 74,197  
Revolving Loans Converted to Term Loans 1,124  
Total loans 279,345  
Grade 4 [Member] | Consumer and Other [Member]    
Financing Receivable Impaired [Line Items]    
2023 1,658  
2022 252  
2021 1,062  
2020 15,118  
Prior 2,179  
Revolving Loans 2,823  
Total loans 23,092  
Grade 5 [Member]    
Financing Receivable Impaired [Line Items]    
2024 1,613  
2023 578  
2022 31,307  
2021 5,930  
2020 43,124  
Prior 108,169  
Revolving Loans 9,146  
Total loans 199,867  
Grade 5 [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Financing Receivable Impaired [Line Items]    
2023 277  
2022 1,371  
2020 23,351  
Prior 15,687  
Revolving Loans 729  
Total loans 41,415  
Grade 5 [Member] | Real Estate [Member] | Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
2024 1,513  
2023 57  
2022 263  
2021 273  
Prior 1,693  
Total loans 3,799  
Grade 5 [Member] | Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Impaired [Line Items]    
2022 1,195  
2020 119  
Prior 2,488  
Total loans 3,802  
Grade 5 [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Financing Receivable Impaired [Line Items]    
2023 190  
2022 7,142  
2021 5,472  
2020 18,209  
Prior 87,917  
Revolving Loans 855  
Total loans 119,785  
Grade 5 [Member] | Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
2024 100  
2023 54  
2022 21,336  
2021 185  
2020 1,445  
Prior 384  
Revolving Loans 7,562  
Total loans 31,066  
Grade 6 [Member]    
Financing Receivable Impaired [Line Items]    
2024 402  
2023 910  
2022 9,181  
2021 9,664  
2020 16,325  
Prior 84,267  
Revolving Loans 3,945  
Total loans 124,694  
Grade 6 [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Financing Receivable Impaired [Line Items]    
2021 7,319  
2020 182  
Prior 534  
Total loans 8,035  
Grade 6 [Member] | Real Estate [Member] | Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
2022 2,879  
2021 76  
Prior 1,180  
Total loans 4,135  
Grade 6 [Member] | Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Impaired [Line Items]    
2023 20  
2022 508  
2021 214  
2020 19  
Prior 1,087  
Total loans 1,848  
Grade 6 [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Financing Receivable Impaired [Line Items]    
2023 597  
2022 2,039  
2021 1,487  
2020 15,845  
Prior 81,440  
Total loans 101,408  
Grade 6 [Member] | Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
2024 402  
2023 293  
2022 3,755  
2021 568  
2020 279  
Prior 26  
Revolving Loans 3,945  
Total loans 9,268  
Grade 7 [Member]    
Financing Receivable Impaired [Line Items]    
2024 69  
2023 7,926  
2022 11,588  
2021 11,675  
2020 7,604  
Prior 14,802  
Revolving Loans 1,173  
Revolving Loans Converted to Term Loans 289  
Total loans 55,126  
Grade 7 [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Financing Receivable Impaired [Line Items]    
2021 122  
Prior 290  
Revolving Loans 236  
Total loans 648  
Grade 7 [Member] | Real Estate [Member] | Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
2022 1,643  
Prior 27  
Total loans 1,670  
Grade 7 [Member] | Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Impaired [Line Items]    
2023 1,598  
2022 8,550  
2021 5,698  
2020 4,715  
Prior 10,735  
Revolving Loans 127  
Total loans 31,423  
Grade 7 [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Financing Receivable Impaired [Line Items]    
2023 2,451  
2022 511  
2021 574  
2020 1,644  
Prior 2,445  
Revolving Loans 50  
Total loans 7,675  
Grade 7 [Member] | Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
2024 69  
2023 3,869  
2022 884  
2021 5,281  
2020 1,245  
Prior 1,291  
Revolving Loans 715  
Revolving Loans Converted to Term Loans 289  
Total loans 13,643  
Grade 7 [Member] | Consumer and Other [Member]    
Financing Receivable Impaired [Line Items]    
2023 8  
Prior 14  
Revolving Loans 45  
Total loans $ 67  
[1] Includes $10.0 million and $5.7 million of residential mortgage loans held for sale at June 30, 2024 and December 31, 2023, respectively.