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Loans and Allowance for Loan Losses - Schedule of Current, Accruing Past Due, and Non-Accrual Loans by Portfolio Class (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | $ 44,625,627 | $ 42,609,028
Non-accrual with an ALL | 248,506 | 271,174
Non-accrual without an ALL | 7,751 | 37,990
Accrued interest receivable | $ 214,700 | $ 217,100
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] | Other assets | Other assets
Deferred loan costs (fees) | $ (46,700) | $ (34,100)
Commercial & Industrial |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 24,288,664 | 22,331,129
Non-accrual with an ALL | 146,543 | 119,264
Non-accrual without an ALL | 4,949 | 37,990
Commercial & Industrial | Commercial, financial, and agricultural |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 16,174,745 | 14,498,992
Non-accrual with an ALL | 120,713 | 98,145
Non-accrual without an ALL | 4,582 | 24,729
Commercial & Industrial | Owner-occupied |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 8,113,919 | 7,832,137
Non-accrual with an ALL | 25,830 | 21,119
Non-accrual without an ALL | 367 | 13,261
Commercial Real Estate |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 12,097,395 | 12,014,619
Non-accrual with an ALL | 37,589 | 77,804
Non-accrual without an ALL | 1,021 | 0
Commercial Real Estate | Investment properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 11,279,922 | 11,181,204
Non-accrual with an ALL | 34,679 | 74,030
Non-accrual without an ALL | 989 | 0
Commercial Real Estate | 1-4 family properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 542,178 | 545,918
Non-accrual with an ALL | 2,728 | 2,385
Non-accrual without an ALL | 32 | 0
Commercial Real Estate | Land and development |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 275,295 | 287,497
Non-accrual with an ALL | 182 | 1,389
Non-accrual without an ALL | 0 | 0
Consumer |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 8,239,568 | 8,263,280
Non-accrual with an ALL | 64,374 | 74,106
Non-accrual without an ALL | 1,781 | 0
Consumer | Consumer mortgages |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 5,212,860 | 5,288,776
Non-accrual with an ALL | 45,354 | 50,834
Non-accrual without an ALL | 1,618 | 0
Consumer | Home equity |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,844,991 | 1,831,287
Non-accrual with an ALL | 13,024 | 17,365
Non-accrual without an ALL | 163 | 0
Consumer | Credit cards |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 185,828 | 185,871
Non-accrual with an ALL | 0 | 0
Non-accrual without an ALL | 0 | 0
Consumer | Other consumer loans |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 995,889 | 957,346
Non-accrual with an ALL | 5,996 | 5,907
Non-accrual without an ALL | 0 | 0
Current |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 44,306,666 | 42,190,986
Current | Commercial & Industrial |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 24,111,935 | 22,106,891
Current | Commercial & Industrial | Commercial, financial, and agricultural |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 16,029,058 | 14,352,839
Current | Commercial & Industrial | Owner-occupied |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 8,082,877 | 7,754,052
Current | Commercial Real Estate |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 12,055,904 | 11,931,858
Current | Commercial Real Estate | Investment properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 11,243,037 | 11,105,168
Current | Commercial Real Estate | 1-4 family properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 538,285 | 541,897
Current | Commercial Real Estate | Land and development |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 274,582 | 284,793
Current | Consumer |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 8,138,827 | 8,152,237
Current | Consumer | Consumer mortgages |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 5,160,701 | 5,228,580
Current | Consumer | Home equity |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,816,272 | 1,800,614
Current | Consumer | Credit cards |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 182,283 | 182,435
Current | Consumer | Other consumer loans |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 979,571 | 940,608
Accruing 30-89 Days Past Due |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 58,423 | 60,286
Accruing 30-89 Days Past Due | Commercial & Industrial |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 22,746 | 20,647
Accruing 30-89 Days Past Due | Commercial & Industrial | Commercial, financial, and agricultural |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 17,901 | 12,947
Accruing 30-89 Days Past Due | Commercial & Industrial | Owner-occupied |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 4,845 | 7,700
Accruing 30-89 Days Past Due | Commercial Real Estate |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 2,863 | 4,755
Accruing 30-89 Days Past Due | Commercial Real Estate | Investment properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,217 | 2,006
Accruing 30-89 Days Past Due | Commercial Real Estate | 1-4 family properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,115 | 1,636
Accruing 30-89 Days Past Due | Commercial Real Estate | Land and development |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 531 | 1,113
Accruing 30-89 Days Past Due | Consumer |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 32,814 | 34,884
Accruing 30-89 Days Past Due | Consumer | Consumer mortgages |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 5,187 | 9,362
Accruing 30-89 Days Past Due | Consumer | Home equity |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 15,532 | 13,131
Accruing 30-89 Days Past Due | Consumer | Credit cards |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,773 | 1,573
Accruing 30-89 Days Past Due | Consumer | Other consumer loans |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 10,322 | 10,818
Accruing 90 Days or Greater Past Due |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 4,281 | 48,592
Accruing 90 Days or Greater Past Due | Commercial & Industrial |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 2,491 | 46,337
Accruing 90 Days or Greater Past Due | Commercial & Industrial | Commercial, financial, and agricultural |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 2,491 | 10,332
Accruing 90 Days or Greater Past Due | Commercial & Industrial | Owner-occupied |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 0 | 36,005
Accruing 90 Days or Greater Past Due | Commercial Real Estate |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 18 | 202
Accruing 90 Days or Greater Past Due | Commercial Real Estate | Investment properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 0 | 0
Accruing 90 Days or Greater Past Due | Commercial Real Estate | 1-4 family properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 18 | 0
Accruing 90 Days or Greater Past Due | Commercial Real Estate | Land and development |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 0 | 202
Accruing 90 Days or Greater Past Due | Consumer |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,772 | 2,053
Accruing 90 Days or Greater Past Due | Consumer | Consumer mortgages |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 0 | 0
Accruing 90 Days or Greater Past Due | Consumer | Home equity |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 0 | 177
Accruing 90 Days or Greater Past Due | Consumer | Credit cards |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,772 | 1,863
Accruing 90 Days or Greater Past Due | Consumer | Other consumer loans |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 0 | 13
Total Accruing Past Due |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 62,704 | 108,878
Total Accruing Past Due | Commercial & Industrial |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 25,237 | 66,984
Total Accruing Past Due | Commercial & Industrial | Commercial, financial, and agricultural |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 20,392 | 23,279
Total Accruing Past Due | Commercial & Industrial | Owner-occupied |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 4,845 | 43,705
Total Accruing Past Due | Commercial Real Estate |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 2,881 | 4,957
Total Accruing Past Due | Commercial Real Estate | Investment properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,217 | 2,006
Total Accruing Past Due | Commercial Real Estate | 1-4 family properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,133 | 1,636
Total Accruing Past Due | Commercial Real Estate | Land and development |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 531 | 1,315
Total Accruing Past Due | Consumer |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 34,586 | 36,937
Total Accruing Past Due | Consumer | Consumer mortgages |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 5,187 | 9,362
Total Accruing Past Due | Consumer | Home equity |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 15,532 | 13,308
Total Accruing Past Due | Consumer | Credit cards |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 3,545 | 3,436
Total Accruing Past Due | Consumer | Other consumer loans |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | $ 10,322 | $ 10,831

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