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Loans and Leases (Composition of the Loans and Leases Outstanding by Credit Quality Indicator) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | $ 32,371,522 | $ 32,791,975
Current |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 32,232,138 | 32,546,490
30-59 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 71,053 | 121,499
60-89 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 16,462 | 26,043
90 days or greater |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 51,869 | 97,943
Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 22,280,288 | 22,558,060
Consumer Portfolio Segment |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 9,753,610 | 9,771,033
Construction and land development | Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 1,111,797 | 985,424
Construction and land development | Commercial | Pass |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 1,104,778 | 970,865
Construction and land development | Commercial | Special mention |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 498 | 12,162
Construction and land development | Commercial | Substandard |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 6,521 | 2,397
Construction and land development | Consumer Portfolio Segment |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 399,570 | 348,123
Construction and land development | Consumer Portfolio Segment | 30-59 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 388 | 932
Construction and land development | Consumer Portfolio Segment | 60-89 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 0 | 77
Construction and land development | Consumer Portfolio Segment | 90 days or greater |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 41 | 330
Commercial and industrial | Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 5,710,652 | 5,013,644
Commercial and industrial | Commercial | Pass |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 5,541,997 | 4,846,634
Commercial and industrial | Commercial | Special mention |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 46,069 | 50,429
Commercial and industrial | Commercial | Substandard |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 50,538 | 60,249
Commercial and industrial | Commercial | Doubtful |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 1 |
Commercial and industrial | Commercial | Ungraded |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 72,047 | 56,332
Non-PCI Loans | Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 22,558,060
Non-PCI Loans | Commercial | Current |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 22,490,943
Non-PCI Loans | Commercial | 30-59 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 36,615
Non-PCI Loans | Commercial | 60-89 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 5,601
Non-PCI Loans | Commercial | 90 days or greater |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 24,901
Non-PCI Loans | Consumer Portfolio Segment |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 9,753,610 | 9,771,033
Non-PCI Loans | Consumer Portfolio Segment | Current |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 9,690,703 | 9,648,089
Non-PCI Loans | Consumer Portfolio Segment | 30-59 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 32,382 | 66,562
Non-PCI Loans | Consumer Portfolio Segment | 60-89 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 9,299 | 14,366
Non-PCI Loans | Consumer Portfolio Segment | 90 days or greater |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 21,226 | 42,016
Non-PCI Loans | Construction and land development | Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 1,111,797 | 985,424
Non-PCI Loans | Construction and land development | Commercial | Current |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 1,109,242 | 982,338
Non-PCI Loans | Construction and land development | Commercial | 30-59 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 456 | 956
Non-PCI Loans | Construction and land development | Commercial | 60-89 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 0 | 527
Non-PCI Loans | Construction and land development | Commercial | 90 days or greater |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 2,099 | 1,603
Non-PCI Loans | Construction and land development | Consumer Portfolio Segment |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 399,570 | 348,123
Non-PCI Loans | Construction and land development | Consumer Portfolio Segment | Current |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 399,141 | 346,784
Non-PCI Loans | Construction and land development | Consumer Portfolio Segment | 30-59 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 388 | 932
Non-PCI Loans | Construction and land development | Consumer Portfolio Segment | 60-89 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 0 | 77
Non-PCI Loans | Construction and land development | Consumer Portfolio Segment | 90 days or greater |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 41 | 330
Non-PCI Loans | Mortgage | Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 11,165,012
Non-PCI Loans | Mortgage | Commercial | Current |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 11,139,941
Non-PCI Loans | Mortgage | Commercial | 30-59 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 8,757
Non-PCI Loans | Mortgage | Commercial | 60-89 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 2,232
Non-PCI Loans | Mortgage | Commercial | 90 days or greater |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 14,082
Non-PCI Loans | Other commercial real estate | Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 2,987,689
Non-PCI Loans | Other commercial real estate | Commercial | Current |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 2,969,346
Non-PCI Loans | Other commercial real estate | Commercial | 30-59 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 12,370
Non-PCI Loans | Other commercial real estate | Commercial | 60-89 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 0
Non-PCI Loans | Other commercial real estate | Commercial | 90 days or greater |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 5,973
Non-PCI Loans | Commercial and industrial | Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 5,710,652 | 5,013,644
Non-PCI Loans | Commercial and industrial | Commercial | Current |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 5,692,791 | 4,993,027
Non-PCI Loans | Commercial and industrial | Commercial | 30-59 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 7,909 | 14,532
Non-PCI Loans | Commercial and industrial | Commercial | 60-89 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 3,714 | 2,842
Non-PCI Loans | Commercial and industrial | Commercial | 90 days or greater |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 6,238 | 3,243
Non-PCI Loans | Other | Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 22,280,288 | 2,406,291
Non-PCI Loans | Other | Commercial | Current |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 22,230,768 | 2,406,291
Non-PCI Loans | Other | Commercial | 30-59 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 27,773 | 0
Non-PCI Loans | Other | Commercial | 60-89 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 4,264 | 0
Non-PCI Loans | Other | Commercial | 90 days or greater |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 17,483 | 0
Non-PCI Loans | Consumer | Consumer Portfolio Segment |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 552,968
Non-PCI Loans | Consumer | Consumer Portfolio Segment | Current |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 546,389
Non-PCI Loans | Consumer | Consumer Portfolio Segment | 30-59 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 3,610
Non-PCI Loans | Consumer | Consumer Portfolio Segment | 60-89 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 1,464
Non-PCI Loans | Consumer | Consumer Portfolio Segment | 90 days or greater |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases |  | 1,505
PCD Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 337,624 | 462,882
PCD Loans | Current |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 310,667 | 407,458
PCD Loans | 30-59 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 10,898 | 18,322
PCD Loans | 60-89 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | 2,899 | 6,076
PCD Loans | 90 days or greater |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans and leases | $ 13,160 | $ 31,026

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