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Loans and Leases (Composition of the Loans and Leases Outstanding By Credit Quality Indicator) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | $ 215,919 | $ 245,485
Current loans | 32,964,932 | 32,546,490
Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-PCI loans | 23,097,302 | 22,558,060
Commercial | Commercial and industrial and leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-PCI loans | 4,946,445 | 5,013,644
Commercial | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-PCI loans | 1,022,087 | 985,424
Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-PCI loans | 9,650,776 | 9,771,033
Consumer | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-PCI loans | 336,065 | 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 | 27,177 | 25,071
Current loans | 11,313,789 | 11,139,941
Non-PCI Loans | Commercial | Non-owner occupied commercial mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 14,266 | 18,343
Current loans | 3,003,632 | 2,969,346
Non-PCI Loans | Commercial | Commercial and industrial and leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 21,304 | 20,617
Current loans | 4,925,141 | 4,993,027
Non-PCI Loans | Commercial | Total commercial loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 64,619 | 0
Current loans | 23,032,683 | 2,406,291
Non-PCI Loans | Commercial | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 1,872 | 3,086
Current loans | 1,020,215 | 982,338
Non-PCI Loans | Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 102,034 | 122,944
Current loans | 9,548,742 | 9,648,089
Non-PCI Loans | Consumer | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 1,862 | 1,339
Current loans | 334,203 | 346,784
Non-PCI Loans | Consumer | Consumer other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 4,975 | 6,579
Current loans | 533,702 | 546,389
PCD Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 49,266 | 55,424
Current loans | 383,507 | 407,458
30 to 59 Days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 90,526 | 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 | 13,153 | 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 | 5,046 | 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 | 13,284 | 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 | 31,760 | 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 | 277 | 956
30 to 59 Days past due | Non-PCI Loans | Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 47,516 | 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 | 266 | 932
30 to 59 Days past due | Non-PCI Loans | Consumer | Consumer other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 2,246 | 3,610
30 to 59 Days past due | PCD Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 11,250 | 18,322
60 to 89 Days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 24,562 | 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 | 2,996 | 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 | 303 | 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 | 4,771 | 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 | 8,070 | 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 | 12,170 | 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 | 944 | 77
60 to 89 Days past due | Non-PCI Loans | Consumer | Consumer other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 1,213 | 1,464
60 to 89 Days past due | PCD Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 4,322 | 6,076
90 Days or greater |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 100,831 | 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 | 11,028 | 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 | 8,917 | 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 | 3,249 | 3,243
90 Days or greater | Non-PCI Loans | Commercial | Total commercial loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 24,789 | 0
90 Days or greater | Non-PCI Loans | Commercial | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 1,595 | 1,603
90 Days or greater | Non-PCI Loans | Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 42,348 | 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 | 652 | 330
90 Days or greater | Non-PCI Loans | Consumer | Consumer other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 1,516 | 1,505
90 Days or greater | PCD Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | $ 33,694 | $ 31,026

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