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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, 2025
Dec. 31, 2024
Financing Receivable Impaired [Line Items]    
2025 $ 2,772,609  
2024 2,307,861  
2023 2,927,839  
2022 4,637,381  
2021 3,338,604  
Prior 4,509,077  
Revolving Loans 1,691,055  
Revolving Loans Converted to Term Loans 12,962  
Total loans 22,197,388 $ 22,149,209
Current-period gross write-offs, 2025 3,022  
Current-period gross write-offs, 2024 746  
Current-period gross write-offs, 2023 1,066  
Current-period gross write-offs, 2022 811  
Current-period gross write-offs, 2021 163  
Current-period gross write-offs, Prior 354  
Current-period gross write-offs, Revolving Loans 1,998  
Current-period gross write-offs, Total 8,165  
PCD Loans [Member]    
Financing Receivable Impaired [Line Items]    
2025 47,469  
2024 63,908  
2023 26,475  
2022 99,374  
2021 50,545  
Prior 56,068  
Revolving Loans 37,229  
Revolving Loans Converted to Term Loans 0  
Total loans 381,068  
Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
Total loans 1,029,249 1,033,546
Warehouse Purchase Program [Member]    
Financing Receivable Impaired [Line Items]    
2025 1,287,440  
Total loans 1,287,440 1,080,903
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Financing Receivable Impaired [Line Items]    
2025 494,576  
2024 687,392  
2023 532,386  
2022 657,395  
2021 243,689  
Prior 85,104  
Revolving Loans 171,847  
Revolving Loans Converted to Term Loans 849  
Total loans 2,873,238 2,859,281
Current-period gross write-offs, 2024 82  
Current-period gross write-offs, Total 82  
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | PCD Loans [Member]    
Financing Receivable Impaired [Line Items]    
2025 11,930  
2024 11,700  
2023 8,159  
2022 29,856  
2021 5,733  
Prior 3,258  
Revolving Loans 15,248  
Total loans 85,884  
Real Estate [Member] | Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
2025 151,330  
2024 156,907  
2023 85,078  
2022 188,348  
2021 109,635  
Prior 140,020  
Revolving Loans 197,705  
Revolving Loans Converted to Term Loans 226  
Total loans 1,029,249  
Current-period gross write-offs, 2024 29  
Current-period gross write-offs, Total 37  
Real Estate [Member] | Agriculture [Member] | PCD Loans [Member]    
Financing Receivable Impaired [Line Items]    
2025 14,382  
2024 14,277  
2023 19  
2022 2,346  
2021 1,422  
Prior 5,120  
Revolving Loans 5,058  
Total loans 42,624  
Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Impaired [Line Items]    
2025 229,697  
2024 539,500  
2023 1,558,056  
2022 2,166,853  
2021 1,837,657  
Prior 1,965,780  
Revolving Loans 99,796  
Revolving Loans Converted to Term Loans 2,848  
Total loans [1] 8,400,187 8,487,589
Current-period gross write-offs, 2023 483  
Current-period gross write-offs, 2022 467  
Current-period gross write-offs, 2021 51  
Current-period gross write-offs, Prior 25  
Current-period gross write-offs, Revolving Loans 442  
Current-period gross write-offs, Total 1,468  
Real Estate [Member] | 1-4 Family [Member] | PCD Loans [Member]    
Financing Receivable Impaired [Line Items]    
2025 47  
2024 32  
2023 1,616  
2022 3,093  
2021 279  
Prior 1,862  
Total loans 6,929  
Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Financing Receivable Impaired [Line Items]    
2025 345,556  
2024 456,684  
2023 505,690  
2022 1,382,630  
2021 1,023,001  
Prior 2,046,469  
Revolving Loans 67,315  
Revolving Loans Converted to Term Loans 300  
Total loans 5,827,645 5,800,985
Current-period gross write-offs, 2024 74  
Current-period gross write-offs, 2023 342  
Current-period gross write-offs, 2022 33  
Current-period gross write-offs, Revolving Loans 50  
Current-period gross write-offs, Total 499  
Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member] | PCD Loans [Member]    
Financing Receivable Impaired [Line Items]    
2025 21,034  
2024 36,645  
2023 15,932  
2022 55,576  
2021 42,290  
Prior 43,981  
Total loans 215,458  
Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
2025 205,075  
2024 333,744  
2023 211,656  
2022 199,137  
2021 106,290  
Prior 242,149  
Revolving Loans 1,104,194  
Revolving Loans Converted to Term Loans 8,637  
Total loans 2,410,882 2,508,088
Current-period gross write-offs, 2024 515  
Current-period gross write-offs, 2023 160  
Current-period gross write-offs, 2022 273  
Current-period gross write-offs, 2021 104  
Current-period gross write-offs, Prior 85  
Current-period gross write-offs, Revolving Loans 1,440  
Current-period gross write-offs, Total 2,577  
Commercial and Industrial [Member] | PCD Loans [Member]    
Financing Receivable Impaired [Line Items]    
2025 76  
2024 1,254  
2023 749  
2022 8,503  
2021 808  
Prior 1,842  
Revolving Loans 16,921  
Total loans 30,153  
Consumer and Other [Member]    
Financing Receivable Impaired [Line Items]    
2025 58,935  
2024 133,634  
2023 34,973  
2022 43,018  
2021 18,332  
Prior 29,555  
Revolving Loans 50,198  
Revolving Loans Converted to Term Loans 102  
Total loans 368,747 $ 378,817
Current-period gross write-offs, 2025 3,022  
Current-period gross write-offs, 2024 46  
Current-period gross write-offs, 2023 81  
Current-period gross write-offs, 2022 38  
Current-period gross write-offs, Prior 244  
Current-period gross write-offs, Revolving Loans 66  
Current-period gross write-offs, Revolving Loans Converted to Term Loans 5  
Current-period gross write-offs, Total 3,502  
Consumer and Other [Member] | PCD Loans [Member]    
Financing Receivable Impaired [Line Items]    
2021 13  
Prior 5  
Revolving Loans 2  
Total loans 20  
Grade 1 [Member]    
Financing Receivable Impaired [Line Items]    
2025 42,357  
2024 39,730  
2023 7,630  
2022 2,411  
2021 2,949  
Prior 1,059  
Revolving Loans 58,176  
Revolving Loans Converted to Term Loans 0  
Total loans 154,312  
Grade 1 [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Financing Receivable Impaired [Line Items]    
2025 274  
Total loans 274  
Grade 1 [Member] | Real Estate [Member] | Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
2025 3,003  
2024 1,520  
2023 346  
2022 8  
2021 7  
Prior 2  
Revolving Loans 9,226  
Total loans 14,112  
Grade 1 [Member] | Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Impaired [Line Items]    
2023 70  
2022 138  
Prior 106  
Total loans 314  
Grade 1 [Member] | Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
2025 22,560  
2024 25,250  
2023 3,590  
2022 1,056  
2021 2,054  
Prior 673  
Revolving Loans 47,178  
Total loans 102,361  
Grade 1 [Member] | Consumer and Other [Member]    
Financing Receivable Impaired [Line Items]    
2025 16,520  
2024 12,960  
2023 3,624  
2022 1,209  
2021 888  
Prior 278  
Revolving Loans 1,772  
Total loans 37,251  
Grade 2 [Member]    
Financing Receivable Impaired [Line Items]    
2025 10,373  
2024 101,532  
2023 12,182  
2022 22,577  
2021 140  
Prior 6,656  
Revolving Loans 16,203  
Total loans 169,663  
Grade 2 [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Financing Receivable Impaired [Line Items]    
2023 659  
2022 139  
Prior 13  
Total loans 811  
Grade 2 [Member] | Real Estate [Member] | Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
2023 8  
2022 45  
Prior 552  
Total loans 605  
Grade 2 [Member] | Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Impaired [Line Items]    
2023 506  
2022 1,010  
2021 140  
Prior 2,042  
Total loans 3,698  
Grade 2 [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Financing Receivable Impaired [Line Items]    
2025 387  
2022 763  
Prior 751  
Revolving Loans 6,523  
Total loans 8,424  
Grade 2 [Member] | Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
2024 1,578  
2023 506  
2022 6,831  
Prior 1,558  
Revolving Loans 9,678  
Total loans 20,151  
Grade 2 [Member] | Consumer and Other [Member]    
Financing Receivable Impaired [Line Items]    
2025 9,986  
2024 99,954  
2023 10,503  
2022 13,789  
Prior 1,740  
Revolving Loans 2  
Revolving Loans Converted to Term Loans  
Total loans 135,974  
Grade 3 [Member]    
Financing Receivable Impaired [Line Items]    
2025 2,473,873  
2024 1,781,878  
2023 2,498,594  
2022 3,675,141  
2021 2,897,429  
Prior 3,338,951  
Revolving Loans 1,333,732  
Revolving Loans Converted to Term Loans 7,444  
Total loans 18,007,042  
Grade 3 [Member] | Warehouse Purchase Program [Member]    
Financing Receivable Impaired [Line Items]    
2025 1,287,440  
Total loans 1,287,440  
Grade 3 [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Financing Receivable Impaired [Line Items]    
2025 441,971  
2024 552,385  
2023 324,163  
2022 335,752  
2021 157,548  
Prior 57,530  
Revolving Loans 110,247  
Revolving Loans Converted to Term Loans 849  
Total loans 1,980,445  
Grade 3 [Member] | Real Estate [Member] | Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
2025 98,098  
2024 105,904  
2023 70,970  
2022 166,396  
2021 80,789  
Prior 119,280  
Revolving Loans 154,960  
Revolving Loans Converted to Term Loans 226  
Total loans 796,623  
Grade 3 [Member] | Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Impaired [Line Items]    
2025 222,803  
2024 526,947  
2023 1,530,991  
2022 2,127,012  
2021 1,799,587  
Prior 1,872,142  
Revolving Loans 96,821  
Revolving Loans Converted to Term Loans 2,848  
Total loans 8,179,151  
Grade 3 [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Financing Receivable Impaired [Line Items]    
2025 217,566  
2024 312,016  
2023 385,826  
2022 882,609  
2021 746,270  
Prior 1,067,147  
Revolving Loans 51,582  
Total loans 3,663,016  
Grade 3 [Member] | Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
2025 173,577  
2024 264,443  
2023 167,051  
2022 135,397  
2021 96,679  
Prior 211,646  
Revolving Loans 880,871  
Revolving Loans Converted to Term Loans 3,519  
Total loans 1,933,183  
Grade 3 [Member] | Consumer and Other [Member]    
Financing Receivable Impaired [Line Items]    
2025 32,418  
2024 20,183  
2023 19,593  
2022 27,975  
2021 16,556  
Prior 11,206  
Revolving Loans 39,251  
Revolving Loans Converted to Term Loans 2  
Total loans 167,184  
Grade 4 [Member]    
Financing Receivable Impaired [Line Items]    
2025 178,588  
2024 253,168  
2023 357,812  
2022 771,680  
2021 357,291  
Prior 810,511  
Revolving Loans 175,815  
Revolving Loans Converted to Term Loans 1,894  
Total loans 2,906,759  
Grade 4 [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Financing Receivable Impaired [Line Items]    
2025 30,416  
2024 122,532  
2023 199,392  
2022 291,566  
2021 79,910  
Prior 18,311  
Revolving Loans 45,440  
Total loans 787,567  
Grade 4 [Member] | Real Estate [Member] | Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
2025 34,478  
2024 31,885  
2023 13,690  
2022 17,798  
2021 26,794  
Prior 12,667  
Revolving Loans 28,211  
Total loans 165,523  
Grade 4 [Member] | Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Impaired [Line Items]    
2025 6,715  
2024 11,689  
2023 18,532  
2022 18,607  
2021 27,701  
Prior 66,708  
Revolving Loans 2,804  
Total loans 152,756  
Grade 4 [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Financing Receivable Impaired [Line Items]    
2025 98,326  
2024 51,622  
2023 97,967  
2022 417,711  
2021 216,346  
Prior 672,776  
Revolving Loans 9,210  
Revolving Loans Converted to Term Loans 300  
Total loans 1,564,258  
Grade 4 [Member] | Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
2025 8,642  
2024 34,903  
2023 26,999  
2022 25,956  
2021 5,665  
Prior 23,723  
Revolving Loans 81,067  
Revolving Loans Converted to Term Loans 1,494  
Total loans 208,449  
Grade 4 [Member] | Consumer and Other [Member]    
Financing Receivable Impaired [Line Items]    
2025 11  
2024 537  
2023 1,232  
2022 42  
2021 875  
Prior 16,326  
Revolving Loans 9,083  
Revolving Loans Converted to Term Loans 100  
Total loans 28,206  
Grade 5 [Member]    
Financing Receivable Impaired [Line Items]    
2025 7,880  
2024 33,763  
2023 1,909  
2022 40,248  
2021 16,238  
Prior 192,633  
Revolving Loans 9,828  
Total loans 302,499  
Grade 5 [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Financing Receivable Impaired [Line Items]    
2025 2,723  
2024 250  
2023 13  
2021 352  
Prior 5,346  
Revolving Loans 912  
Total loans 9,596  
Grade 5 [Member] | Real Estate [Member] | Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
2025 1,369  
2024 1,525  
2023 45  
2022 241  
2021 623  
Prior 1,358  
Total loans 5,161  
Grade 5 [Member] | Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Impaired [Line Items]    
2025 132  
2024 488  
2023 679  
2022 2,356  
2021 2,442  
Prior 2,665  
Revolving Loans 76  
Total loans 8,838  
Grade 5 [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Financing Receivable Impaired [Line Items]    
2025 3,511  
2024 27,256  
2023 1,023  
2022 19,537  
2021 12,271  
Prior 180,937  
Total loans 244,535  
Grade 5 [Member] | Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
2025 145  
2024 4,244  
2023 149  
2022 18,114  
2021 550  
Prior 2,327  
Revolving Loans 8,752  
Total loans 34,281  
Grade 5 [Member] | Consumer and Other [Member]    
Financing Receivable Impaired [Line Items]    
Revolving Loans 88  
Total loans 88  
Grade 6 [Member]    
Financing Receivable Impaired [Line Items]    
2025 12,069  
2024 30,068  
2023 13,807  
2022 8,311  
2021 2,767  
Prior 83,919  
Revolving Loans 39,131  
Revolving Loans Converted to Term Loans 3,624  
Total loans 193,696  
Grade 6 [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Financing Receivable Impaired [Line Items]    
2025 7,262  
2024 525  
2021 146  
Prior 460  
Total loans 8,393  
Grade 6 [Member] | Real Estate [Member] | Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
Prior 656  
Total loans 656  
Grade 6 [Member] | Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Impaired [Line Items]    
2024 132  
2023 370  
2022 400  
2021 201  
Prior 2,734  
Total loans 3,837  
Grade 6 [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Financing Receivable Impaired [Line Items]    
2025 4,732  
2024 28,076  
2023 4,942  
2022 4,858  
2021 1,969  
Prior 79,856  
Total loans 124,433  
Grade 6 [Member] | Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
2025 75  
2024 1,335  
2023 8,495  
2022 3,053  
2021 451  
Prior 213  
Revolving Loans 39,131  
Revolving Loans Converted to Term Loans 3,624  
Total loans 56,377  
Grade 7 [Member]    
Financing Receivable Impaired [Line Items]    
2025 0  
2024 3,814  
2023 9,430  
2022 17,639  
2021 11,245  
Prior 19,280  
Revolving Loans 20,941  
Total loans 82,349  
Grade 7 [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Financing Receivable Impaired [Line Items]    
2022 82  
Prior 186  
Total loans 268  
Grade 7 [Member] | Real Estate [Member] | Agriculture [Member]    
Financing Receivable Impaired [Line Items]    
2024 1,796  
2022 1,514  
Prior 385  
Revolving Loans 250  
Total loans 3,945  
Grade 7 [Member] | Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Impaired [Line Items]    
2024 212  
2023 5,292  
2022 14,237  
2021 7,307  
Prior 17,521  
Revolving Loans 95  
Total loans 44,664  
Grade 7 [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Financing Receivable Impaired [Line Items]    
2024 1,069  
2022 1,576  
2021 3,855  
Prior 1,021  
Total loans 7,521  
Grade 7 [Member] | Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
2024 737  
2023 4,117  
2022 227  
2021 83  
Prior 167  
Revolving Loans 20,596  
Total loans 25,927  
Grade 7 [Member] | Consumer and Other [Member]    
Financing Receivable Impaired [Line Items]    
2023 21  
2022 3  
Total loans $ 24  
[1] Includes $6.0 million and $10.7 million of residential mortgage loans held for sale at June 30, 2025 and December 31, 2024, respectively.