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Loans and Allowance for Loan Losses - Schedule Of Current, Accruing Past Due And Nonaccrual Loans (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | $ 43,404,490 | $ 43,716,353
Non-accrual with an ALL | 216,667 | 113,519
Non-accrual without an ALL | 71,510 | 14,542
Accrued interest receivable | $ 256,300 | $ 203,100
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] | Other assets | Other assets
Commercial & Industrial |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | $ 22,598,493 | $ 22,066,656
Non-accrual with an ALL | 137,184 | 57,507
Non-accrual without an ALL | 44,056 | 11,904
Commercial & Industrial | Commercial, financial, and agricultural |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 14,459,345 | 13,874,416
Non-accrual with an ALL | 66,400 | 48,008
Non-accrual without an ALL | 23,470 | 11,299
Commercial & Industrial | Owner-occupied |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 8,139,148 | 8,192,240
Non-accrual with an ALL | 70,784 | 9,499
Non-accrual without an ALL | 20,586 | 605
Commercial Real Estate |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 12,316,758 | 12,650,313
Non-accrual with an ALL | 16,205 | 5,115
Non-accrual without an ALL | 27,425 | 2,638
Commercial Real Estate | Investment properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 11,363,304 | 11,644,047
Non-accrual with an ALL | 12,796 | 1,785
Non-accrual without an ALL | 26,974 | 1,688
Commercial Real Estate | 1-4 family properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 598,502 | 616,933
Non-accrual with an ALL | 2,605 | 2,172
Non-accrual without an ALL | 451 | 950
Commercial Real Estate | Land and development |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 354,952 | 389,333
Non-accrual with an ALL | 804 | 1,158
Non-accrual without an ALL | 0 | 0
Consumer |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 8,489,239 | 8,999,384
Non-accrual with an ALL | 63,278 | 50,897
Non-accrual without an ALL | 29 | 0
Consumer | Consumer mortgages |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 5,411,723 | 5,214,443
Non-accrual with an ALL | 46,108 | 36,847
Non-accrual without an ALL | 0 | 0
Consumer | Home equity |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,807,399 | 1,757,038
Non-accrual with an ALL | 10,473 | 6,830
Non-accrual without an ALL | 0 | 0
Consumer | Credit cards |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 194,141 | 203,612
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 | 1,075,976 | 1,824,291
Non-accrual with an ALL | 6,697 | 7,220
Non-accrual without an ALL | 29 | 0
Current |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 43,057,214 | 43,522,724
Current | Commercial & Industrial |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 22,396,987 | 21,980,288
Current | Commercial & Industrial | Commercial, financial, and agricultural |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 14,355,414 | 13,798,639
Current | Commercial & Industrial | Owner-occupied |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 8,041,573 | 8,181,649
Current | Commercial Real Estate |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 12,271,352 | 12,640,761
Current | Commercial Real Estate | Investment properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 11,322,516 | 11,639,614
Current | Commercial Real Estate | 1-4 family properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 595,359 | 613,049
Current | Commercial Real Estate | Land and development |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 353,477 | 388,098
Current | Consumer |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 8,388,875 | 8,901,675
Current | Consumer | Consumer mortgages |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 5,359,153 | 5,163,417
Current | Consumer | Home equity |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,785,836 | 1,742,412
Current | Consumer | Credit cards |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 190,299 | 200,047
Current | Consumer | Other consumer loans |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,053,587 | 1,795,799
Accruing 30-89 Days Past Due |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 54,046 | 62,195
Accruing 30-89 Days Past Due | Commercial & Industrial |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 18,320 | 15,520
Accruing 30-89 Days Past Due | Commercial & Industrial | Commercial, financial, and agricultural |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 12,264 | 15,033
Accruing 30-89 Days Past Due | Commercial & Industrial | Owner-occupied |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 6,056 | 487
Accruing 30-89 Days Past Due | Commercial Real Estate |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,498 | 1,799
Accruing 30-89 Days Past Due | Commercial Real Estate | Investment properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 740 | 960
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 | 87 | 762
Accruing 30-89 Days Past Due | Commercial Real Estate | Land and development |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 671 | 77
Accruing 30-89 Days Past Due | Consumer |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 34,228 | 44,876
Accruing 30-89 Days Past Due | Consumer | Consumer mortgages |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 6,462 | 13,969
Accruing 30-89 Days Past Due | Consumer | Home equity |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 10,374 | 7,795
Accruing 30-89 Days Past Due | Consumer | Credit cards |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,818 | 1,843
Accruing 30-89 Days Past Due | Consumer | Other consumer loans |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 15,574 | 21,269
Accruing 90 Days or Greater Past Due |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 5,053 | 3,373
Accruing 90 Days or Greater Past Due | Commercial & Industrial |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,946 | 1,437
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 | 1,797 | 1,437
Accruing 90 Days or Greater Past Due | Commercial & Industrial | Owner-occupied |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 149 | 0
Accruing 90 Days or Greater Past Due | Commercial Real Estate |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 278 | 0
Accruing 90 Days or Greater Past Due | Commercial Real Estate | Investment properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 278 | 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 | 0 | 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 | 0
Accruing 90 Days or Greater Past Due | Consumer |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 2,829 | 1,936
Accruing 90 Days or Greater Past Due | Consumer | Consumer mortgages |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 0 | 210
Accruing 90 Days or Greater Past Due | Consumer | Home equity |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 716 | 1
Accruing 90 Days or Greater Past Due | Consumer | Credit cards |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 2,024 | 1,722
Accruing 90 Days or Greater Past Due | Consumer | Other consumer loans |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 89 | 3
Total Accruing Past Due |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 59,099 | 65,568
Total Accruing Past Due | Commercial & Industrial |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 20,266 | 16,957
Total Accruing Past Due | Commercial & Industrial | Commercial, financial, and agricultural |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 14,061 | 16,470
Total Accruing Past Due | Commercial & Industrial | Owner-occupied |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 6,205 | 487
Total Accruing Past Due | Commercial Real Estate |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,776 | 1,799
Total Accruing Past Due | Commercial Real Estate | Investment properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,018 | 960
Total Accruing Past Due | Commercial Real Estate | 1-4 family properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 87 | 762
Total Accruing Past Due | Commercial Real Estate | Land and development |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 671 | 77
Total Accruing Past Due | Consumer |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 37,057 | 46,812
Total Accruing Past Due | Consumer | Consumer mortgages |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 6,462 | 14,179
Total Accruing Past Due | Consumer | Home equity |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 11,090 | 7,796
Total Accruing Past Due | Consumer | Credit cards |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 3,842 | 3,565
Total Accruing Past Due | Consumer | Other consumer loans |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | $ 15,663 | $ 21,272

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