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Allowance for Loan and Lease Losses (Troubled Debt Restructuring) (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 USD ($) loans | Jun. 30, 2017 USD ($) loans | Jun. 30, 2018 USD ($) loans | Jun. 30, 2017 USD ($) loans | Dec. 31, 2017 USD ($)
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 101 | 129 | 249 | 280 |
Financing Receivable, Modifications, Recorded Investment | $ 161,824 |  | $ 161,824 |  | $ 164,561
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 13,087 | $ 7,850 | $ 23,947 | $ 18,228 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 66 | 58 | 129 | 93 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 4,354 | $ 3,779 | $ 9,182 | $ 6,686 |
Non-PCI Loans |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 143,025 |  | 143,025 |  | 146,126
PCI Loans |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 18,799 |  | 18,799 |  | 18,435
Commercial |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 81,474 |  | 81,474 |  | 95,392
Commercial | Construction and land development |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 2,278 |  | 2,278 |  | 4,572
Commercial | Mortgage |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 69,181 |  | 69,181 |  | 78,221
Commercial | Other commercial real estate |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 1,078 |  | 1,078 |  | 1,800
Commercial | Commercial and industrial |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 7,661 |  | 7,661 |  | 8,508
Commercial | Lease financing |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 1,106 |  | 1,106 |  | 1,770
Commercial | Other |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 170 |  | 170 |  | 521
Noncommercial |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 80,350 |  | 80,350 |  | 69,169
Noncommercial | Construction and land development |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 2,911 |  | 2,911 |  | 0
Noncommercial | Mortgage |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 48,224 |  | 48,224 |  | 43,542
Noncommercial | Revolving mortgage |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 26,530 |  | 26,530 |  | 22,853
Noncommercial | Consumer and Other |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 2,685 |  | 2,685 |  | 2,774
Accruing |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 132,310 |  | 132,310 |  | 130,391
Accruing | Non-PCI Loans |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 113,764 |  | 113,764 |  | 112,228
Accruing | PCI Loans |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 18,546 |  | 18,546 |  | 18,163
Accruing | Commercial |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 69,360 |  | 69,360 |  | 76,300
Accruing | Commercial | Construction and land development |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 2,050 |  | 2,050 |  | 4,089
Accruing | Commercial | Mortgage |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 58,877 |  | 58,877 |  | 62,358
Accruing | Commercial | Other commercial real estate |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 1,039 |  | 1,039 |  | 1,012
Accruing | Commercial | Commercial and industrial |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 6,673 |  | 6,673 |  | 7,598
Accruing | Commercial | Lease financing |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 677 |  | 677 |  | 722
Accruing | Commercial | Other |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 44 |  | 44 |  | 521
Accruing | Noncommercial |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 62,950 |  | 62,950 |  | 54,091
Accruing | Noncommercial | Construction and land development |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 2,821 |  | 2,821 |  | 0
Accruing | Noncommercial | Mortgage |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 38,266 |  | 38,266 |  | 34,067
Accruing | Noncommercial | Revolving mortgage |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 19,752 |  | 19,752 |  | 17,673
Accruing | Noncommercial | Consumer and Other |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 2,111 |  | 2,111 |  | 2,351
Nonaccruing |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 29,514 |  | 29,514 |  | 34,170
Nonaccruing | Non-PCI Loans |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 29,261 |  | 29,261 |  | 33,898
Nonaccruing | PCI Loans |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 253 |  | 253 |  | 272
Nonaccruing | Commercial |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 12,114 |  | 12,114 |  | 19,092
Nonaccruing | Commercial | Construction and land development |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 228 |  | 228 |  | 483
Nonaccruing | Commercial | Mortgage |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 10,304 |  | 10,304 |  | 15,863
Nonaccruing | Commercial | Other commercial real estate |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 39 |  | 39 |  | 788
Nonaccruing | Commercial | Commercial and industrial |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 988 |  | 988 |  | 910
Nonaccruing | Commercial | Lease financing |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 429 |  | 429 |  | 1,048
Nonaccruing | Commercial | Other |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 126 |  | 126 |  | 0
Nonaccruing | Noncommercial |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 17,400 |  | 17,400 |  | 15,078
Nonaccruing | Noncommercial | Construction and land development |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 90 |  | 90 |  | 0
Nonaccruing | Noncommercial | Mortgage |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 9,958 |  | 9,958 |  | 9,475
Nonaccruing | Noncommercial | Revolving mortgage |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 6,778 |  | 6,778 |  | 5,180
Nonaccruing | Noncommercial | Consumer and Other |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | $ 574 |  | $ 574 |  | $ 423
Interest only period provided |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 1 | 3 | 2 | 3 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 154 | $ 571 | $ 821 | $ 571 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 2 | 1 | 2 | 1 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 821 | $ 332 | $ 821 | $ 332 |
Loan term extension |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 10 | 13 | 17 | 21 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 936 | $ 1,397 | $ 1,658 | $ 2,070 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 7 | 1 | 8 | 1 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 341 | $ 32 | $ 638 | $ 32 |
Below market interest rate |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 53 | 73 | 139 | 159 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 9,525 | $ 4,440 | $ 15,873 | $ 12,582 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 33 | 32 | 64 | 49 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 1,702 | $ 2,800 | $ 3,385 | $ 4,231 |
Discharged from bankruptcy |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 37 | 40 | 91 | 97 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 2,472 | $ 1,442 | $ 5,595 | $ 3,005 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 24 | 24 | 55 | 42 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 1,490 | $ 615 | $ 4,338 | $ 2,091 |

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