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Loans and Allowance for Loan Losses (Schedule of Current, Accruing Past Due and Nonaccrual Loans) (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | $ 44,353,537 | $ 43,716,353
Non-accrual with an ALL | 217,702 | 113,519
Non-accrual without an ALL | 43,804 | 14,542
Total commercial and industrial |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 22,531,232 | 22,066,656
Non-accrual with an ALL | 125,331 | 57,507
Non-accrual without an ALL | 41,281 | 11,904
Total commercial and industrial | Commercial, financial and agricultural |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 14,166,890 | 13,874,416
Non-accrual with an ALL | 119,134 | 48,008
Non-accrual without an ALL | 25,281 | 11,299
Total commercial and industrial | Owner-occupied |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 8,364,342 | 8,192,240
Non-accrual with an ALL | 6,197 | 9,499
Non-accrual without an ALL | 16,000 | 605
Total consumer |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 8,528,407 | 8,999,384
Non-accrual with an ALL | 58,215 | 50,897
Non-accrual without an ALL | 31 | 0
Total consumer | Consumer mortgages |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 5,379,284 | 5,214,443
Non-accrual with an ALL | 41,877 | 36,847
Non-accrual without an ALL | 0 | 0
Total consumer | Home equity |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,773,987 | 1,757,038
Non-accrual with an ALL | 9,936 | 6,830
Non-accrual without an ALL | 0 | 0
Total consumer | Credit cards |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 187,677 | 203,612
Non-accrual with an ALL | 0 | 0
Non-accrual without an ALL | 0 | 0
Total consumer | Other consumer loans |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,187,459 | 1,824,291
Non-accrual with an ALL | 6,402 | 7,220
Non-accrual without an ALL | 31 | 0
Total commercial real estate |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 13,293,898 | 12,650,313
Non-accrual with an ALL | 34,156 | 5,115
Non-accrual without an ALL | 2,492 | 2,638
Total commercial real estate | Investment properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 12,270,266 | 11,644,047
Non-accrual with an ALL | 29,692 | 1,785
Non-accrual without an ALL | 1,661 | 1,688
Total commercial real estate | 1-4 family properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 615,726 | 616,933
Non-accrual with an ALL | 3,326 | 2,172
Non-accrual without an ALL | 831 | 950
Total commercial real estate | Land and development |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 407,906 | 389,333
Non-accrual with an ALL | 1,138 | 1,158
Non-accrual without an ALL | 0 | 0
Current |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 44,007,085 | 43,522,724
Current | Total commercial and industrial |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 22,316,379 | 21,980,288
Current | Total commercial and industrial | Commercial, financial and agricultural |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 14,001,859 | 13,798,639
Current | Total commercial and industrial | Owner-occupied |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 8,314,520 | 8,181,649
Current | Total consumer |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 8,437,117 | 8,901,675
Current | Total consumer | Consumer mortgages |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 5,332,966 | 5,163,417
Current | Total consumer | Home equity |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,757,068 | 1,742,412
Current | Total consumer | Credit cards |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 184,145 | 200,047
Current | Total consumer | Other consumer loans |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,162,938 | 1,795,799
Current | Total commercial real estate |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 13,253,589 | 12,640,761
Current | Total commercial real estate | Investment properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 12,236,317 | 11,639,614
Current | Total commercial real estate | 1-4 family properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 610,704 | 613,049
Current | Total commercial real estate | Land and development |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 406,568 | 388,098
Accruing 30-89 Days Past Due |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 81,303 | 62,195
Accruing 30-89 Days Past Due | Total commercial and industrial |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 46,759 | 15,520
Accruing 30-89 Days Past Due | Total commercial and industrial | Commercial, financial and agricultural |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 19,134 | 15,033
Accruing 30-89 Days Past Due | Total commercial and industrial | Owner-occupied |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 27,625 | 487
Accruing 30-89 Days Past Due | Total consumer |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 30,883 | 44,876
Accruing 30-89 Days Past Due | Total consumer | Consumer mortgages |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 4,441 | 13,969
Accruing 30-89 Days Past Due | Total consumer | Home equity |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 6,983 | 7,795
Accruing 30-89 Days Past Due | Total consumer | Credit cards |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,481 | 1,843
Accruing 30-89 Days Past Due | Total consumer | Other consumer loans |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 17,978 | 21,269
Accruing 30-89 Days Past Due | Total commercial real estate |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 3,661 | 1,799
Accruing 30-89 Days Past Due | Total commercial real estate | Investment properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 2,596 | 960
Accruing 30-89 Days Past Due | Total commercial real estate | 1-4 family properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 865 | 762
Accruing 30-89 Days Past Due | Total commercial real estate | Land and development |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 200 | 77
Accruing 90 Days or Greater Past Due |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 3,643 | 3,373
Accruing 90 Days or Greater Past Due | Total commercial and industrial |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,482 | 1,437
Accruing 90 Days or Greater Past Due | Total commercial and industrial | Commercial, financial and agricultural |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 1,482 | 1,437
Accruing 90 Days or Greater Past Due | Total commercial and industrial | Owner-occupied |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 0 | 0
Accruing 90 Days or Greater Past Due | Total consumer |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 2,161 | 1,936
Accruing 90 Days or Greater Past Due | Total consumer | Consumer mortgages |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 0 | 210
Accruing 90 Days or Greater Past Due | Total consumer | Home equity |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 0 | 1
Accruing 90 Days or Greater Past Due | Total consumer | Credit cards |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 2,051 | 1,722
Accruing 90 Days or Greater Past Due | Total consumer | Other consumer loans |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 110 | 3
Accruing 90 Days or Greater Past Due | Total commercial real estate |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 0 | 0
Accruing 90 Days or Greater Past Due | Total 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 | Total 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 | Total commercial real estate | Land and development |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 0 | 0
Total Accruing Past Due |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 84,946 | 65,568
Total Accruing Past Due | Total commercial and industrial |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 48,241 | 16,957
Total Accruing Past Due | Total commercial and industrial | Commercial, financial and agricultural |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 20,616 | 16,470
Total Accruing Past Due | Total commercial and industrial | Owner-occupied |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 27,625 | 487
Total Accruing Past Due | Total consumer |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 33,044 | 46,812
Total Accruing Past Due | Total consumer | Consumer mortgages |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 4,441 | 14,179
Total Accruing Past Due | Total consumer | Home equity |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 6,983 | 7,796
Total Accruing Past Due | Total consumer | Credit cards |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 3,532 | 3,565
Total Accruing Past Due | Total consumer | Other consumer loans |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 18,088 | 21,272
Total Accruing Past Due | Total commercial real estate |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 3,661 | 1,799
Total Accruing Past Due | Total commercial real estate | Investment properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 2,596 | 960
Total Accruing Past Due | Total commercial real estate | 1-4 family properties |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | 865 | 762
Total Accruing Past Due | Total commercial real estate | Land and development |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Loans, net of deferred fees and costs | $ 200 | $ 77

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