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Loans and Leases (Composition of the Loans and Leases Outstanding By Credit Quality Indicator) (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | $ 187,774 | $ 245,485
Current loans | 32,501,878 | 32,546,490
Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-PCI loans | 22,490,907 | 22,558,060
Commercial | Commercial and industrial and leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-PCI loans | 5,067,163 | 5,013,644
Commercial | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-PCI loans | 1,183,929 | 985,424
Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-PCI loans | 9,802,239 | 9,771,033
Consumer | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-PCI loans | 376,492 | 348,123
Non-PCI Loans | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans |  | 67,117
Current loans |  | 22,490,943
Non-PCI Loans | Commercial | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 26,088 | 25,071
Current loans | 11,499,982 | 11,139,941
Non-PCI Loans | Commercial | Non-owner occupied commercial mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 12,368 | 18,343
Current loans | 3,002,961 | 2,969,346
Non-PCI Loans | Commercial | Commercial and industrial and leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 22,398 | 20,617
Current loans | 5,044,765 | 4,993,027
Non-PCI Loans | Commercial | Total commercial loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 65,245 | 0
Current loans | 22,425,662 | 2,406,291
Non-PCI Loans | Commercial | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 4,391 | 3,086
Current loans | 1,179,538 | 982,338
Non-PCI Loans | Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 76,026 | 122,944
Current loans | 9,726,213 | 9,648,089
Non-PCI Loans | Consumer | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 880 | 1,339
Current loans | 375,612 | 346,784
Non-PCI Loans | Consumer | Consumer other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 5,251 | 6,579
Current loans | 595,864 | 546,389
PCD Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 46,503 | 55,424
Current loans | 350,003 | 407,458
30 to 59 Days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 74,991 | 121,499
30 to 59 Days past due | Non-PCI Loans | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans |  | 36,615
30 to 59 Days past due | Non-PCI Loans | Commercial | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 11,258 | 8,757
30 to 59 Days past due | Non-PCI Loans | Commercial | Non-owner occupied commercial mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 5,356 | 12,370
30 to 59 Days past due | Non-PCI Loans | Commercial | Commercial and industrial and leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 11,809 | 14,532
30 to 59 Days past due | Non-PCI Loans | Commercial | Total commercial loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 30,472 | 0
30 to 59 Days past due | Non-PCI Loans | Commercial | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 2,049 | 956
30 to 59 Days past due | Non-PCI Loans | Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 31,847 | 66,562
30 to 59 Days past due | Non-PCI Loans | Consumer | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 684 | 932
30 to 59 Days past due | Non-PCI Loans | Consumer | Consumer other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 3,089 | 3,610
30 to 59 Days past due | PCD Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 12,672 | 18,322
60 to 89 Days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 25,767 | 26,043
60 to 89 Days past due | Non-PCI Loans | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans |  | 5,601
60 to 89 Days past due | Non-PCI Loans | Commercial | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 4,071 | 2,232
60 to 89 Days past due | Non-PCI Loans | Commercial | Non-owner occupied commercial mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 3,659 | 0
60 to 89 Days past due | Non-PCI Loans | Commercial | Commercial and industrial and leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 3,370 | 2,842
60 to 89 Days past due | Non-PCI Loans | Commercial | Total commercial loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 11,100 | 0
60 to 89 Days past due | Non-PCI Loans | Commercial | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 0 | 527
60 to 89 Days past due | Non-PCI Loans | Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 9,949 | 14,366
60 to 89 Days past due | Non-PCI Loans | Consumer | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 69 | 77
60 to 89 Days past due | Non-PCI Loans | Consumer | Consumer other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 1,020 | 1,464
60 to 89 Days past due | PCD Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 4,718 | 6,076
90 Days or greater |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 87,016 | 97,943
90 Days or greater | Non-PCI Loans | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans |  | 24,901
90 Days or greater | Non-PCI Loans | Commercial | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 10,759 | 14,082
90 Days or greater | Non-PCI Loans | Commercial | Non-owner occupied commercial mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 3,353 | 5,973
90 Days or greater | Non-PCI Loans | Commercial | Commercial and industrial and leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 7,219 | 3,243
90 Days or greater | Non-PCI Loans | Commercial | Total commercial loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 23,673 | 0
90 Days or greater | Non-PCI Loans | Commercial | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 2,342 | 1,603
90 Days or greater | Non-PCI Loans | Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 34,230 | 42,016
90 Days or greater | Non-PCI Loans | Consumer | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 127 | 330
90 Days or greater | Non-PCI Loans | Consumer | Consumer other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 1,142 | 1,505
90 Days or greater | PCD Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | $ 29,113 | $ 31,026

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