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Loans and Leases (Aging Of The Outstanding Loans and Leases By Class) (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
PCI loans | $ 868,200 | $ 950,516 | $ 1,044,064 | $ 1,186,498
Commercial |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
PCI loans | 543,705 | 593,614 |  |
Non-PCI loans | 13,404,436 | 12,630,489 |  |
Commercial | Construction and land development |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
PCI loans | 23,138 | 33,880 |  |
Non-PCI loans | 642,158 | 620,352 |  |
Commercial | Mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
PCI loans | 491,180 | 525,468 |  |
Non-PCI loans | 8,779,132 | 8,274,548 |  |
Commercial | Other commercial real estate |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
PCI loans | 14,783 | 17,076 |  |
Non-PCI loans | 346,030 | 321,021 |  |
Commercial | Commercial and industrial |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
PCI loans | 11,437 | 15,182 |  |
Non-PCI loans | 2,507,167 | 2,368,958 |  |
Commercial | Lease financing |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Non-PCI loans | 803,601 | 730,778 |  |
Commercial | Other |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
PCI loans | 3,167 | 2,008 |  |
Non-PCI loans | 326,348 | 314,832 |  |
Noncommercial |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
PCI loans | 324,495 | 356,902 |  |
Noncommercial | Construction and land development |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
PCI loans | 83 | 0 |  |
Noncommercial | Mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
PCI loans | 278,872 | 302,158 |  |
Noncommercial | Revolving mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
PCI loans | 43,509 | 52,471 |  |
Noncommercial | Consumer |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
PCI loans | 2,031 | 2,273 |  |
PCI Loans |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
PCI loans | 868,200 | 950,516 |  |
PCI Loans | Noncommercial |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Current loans | 282,338 | 307,089 |  |
PCI Loans | Noncommercial | Construction and land development |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Current loans | 83 | 0 |  |
PCI Loans | Noncommercial | Mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Current loans | 241,341 | 257,207 |  |
PCI Loans | Noncommercial | Revolving mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Current loans | 39,006 | 47,901 |  |
PCI Loans | Noncommercial | Consumer |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Current loans | 1,908 | 1,981 |  |
Non-PCI Loans |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 108,972 | 121,576 |  |
Current loans | 20,319,808 | 19,167,898 |  |
Non-PCI loans | 20,428,780 | 19,289,474 |  |
Non-PCI Loans | Commercial | Construction and land development |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 1,681 | 1,733 |  |
Current loans | 640,477 | 618,619 |  |
Non-PCI loans | 642,158 | 620,352 |  |
Non-PCI Loans | Commercial | Mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 26,745 | 30,964 |  |
Current loans | 8,752,387 | 8,243,584 |  |
Non-PCI loans | 8,779,132 | 8,274,548 |  |
Non-PCI Loans | Commercial | Other commercial real estate |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 989 | 1,026 |  |
Current loans | 345,041 | 319,995 |  |
Non-PCI loans | 346,030 | 321,021 |  |
Non-PCI Loans | Commercial | Commercial and industrial |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 6,370 | 4,992 |  |
Current loans | 2,500,797 | 2,363,966 |  |
Non-PCI loans | 2,507,167 | 2,368,958 |  |
Non-PCI Loans | Commercial | Lease financing |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 2,081 | 2,236 |  |
Current loans | 801,520 | 728,542 |  |
Non-PCI loans | 803,601 | 730,778 |  |
Non-PCI Loans | Commercial | Other |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 642 | 301 |  |
Current loans | 325,706 | 314,531 |  |
Non-PCI loans | 326,348 | 314,832 |  |
Non-PCI Loans | Noncommercial |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Current loans | 6,953,880 | 6,578,661 |  |
Non-PCI loans | 7,024,344 | 6,658,985 |  |
Non-PCI Loans | Noncommercial | Construction and land development |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 3,219 | 5,518 |  |
Current loans | 231,164 | 214,555 |  |
Non-PCI loans | 234,383 | 220,073 |  |
Non-PCI Loans | Noncommercial | Mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 40,483 | 44,776 |  |
Current loans | 2,773,431 | 2,651,209 |  |
Non-PCI loans | 2,813,914 | 2,695,985 |  |
Non-PCI Loans | Noncommercial | Revolving mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 17,412 | 21,041 |  |
Current loans | 2,555,674 | 2,502,065 |  |
Non-PCI loans | 2,573,086 | 2,523,106 |  |
Non-PCI Loans | Noncommercial | Consumer |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 9,350 | 8,989 |  |
Current loans | 1,393,611 | 1,210,832 |  |
Non-PCI loans | 1,402,961 | 1,219,821 |  |
90 Days or greater | PCI Loans | Noncommercial |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 26,458 | 31,208 |  |
90 Days or greater | PCI Loans | Noncommercial | Construction and land development |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 0 | 0 |  |
90 Days or greater | PCI Loans | Noncommercial | Mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 22,975 | 28,192 |  |
90 Days or greater | PCI Loans | Noncommercial | Revolving mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 3,460 | 2,942 |  |
90 Days or greater | PCI Loans | Noncommercial | Consumer |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 23 | 74 |  |
90 Days or greater | Non-PCI Loans |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 40,230 | 39,349 |  |
90 Days or greater | Non-PCI Loans | Commercial | Construction and land development |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 320 | 463 |  |
90 Days or greater | Non-PCI Loans | Commercial | Mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 12,854 | 14,495 |  |
90 Days or greater | Non-PCI Loans | Commercial | Other commercial real estate |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 0 | 142 |  |
90 Days or greater | Non-PCI Loans | Commercial | Commercial and industrial |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 907 | 1,780 |  |
90 Days or greater | Non-PCI Loans | Commercial | Lease financing |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 341 | 164 |  |
90 Days or greater | Non-PCI Loans | Commercial | Other |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 165 | 134 |  |
90 Days or greater | Non-PCI Loans | Noncommercial |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 25,643 | 22,171 |  |
90 Days or greater | Non-PCI Loans | Noncommercial | Construction and land development |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 761 | 1,638 |  |
90 Days or greater | Non-PCI Loans | Noncommercial | Mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 15,669 | 13,280 |  |
90 Days or greater | Non-PCI Loans | Noncommercial | Revolving mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 7,014 | 5,631 |  |
90 Days or greater | Non-PCI Loans | Noncommercial | Consumer |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 2,199 | 1,622 |  |
60 to 89 Days past due | PCI Loans | Noncommercial |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 5,193 | 5,074 |  |
60 to 89 Days past due | PCI Loans | Noncommercial | Construction and land development |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 0 | 0 |  |
60 to 89 Days past due | PCI Loans | Noncommercial | Mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 4,837 | 4,441 |  |
60 to 89 Days past due | PCI Loans | Noncommercial | Revolving mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 338 | 501 |  |
60 to 89 Days past due | PCI Loans | Noncommercial | Consumer |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 18 | 132 |  |
60 to 89 Days past due | Non-PCI Loans |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 15,876 | 18,705 |  |
60 to 89 Days past due | Non-PCI Loans | Commercial | Construction and land development |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 4 | 283 |  |
60 to 89 Days past due | Non-PCI Loans | Commercial | Mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 3,014 | 3,446 |  |
60 to 89 Days past due | Non-PCI Loans | Commercial | Other commercial real estate |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 0 | 0 |  |
60 to 89 Days past due | Non-PCI Loans | Commercial | Commercial and industrial |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 1,402 | 1,079 |  |
60 to 89 Days past due | Non-PCI Loans | Commercial | Lease financing |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 588 | 2 |  |
60 to 89 Days past due | Non-PCI Loans | Commercial | Other |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 158 | 164 |  |
60 to 89 Days past due | Non-PCI Loans | Noncommercial |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 10,710 | 13,731 |  |
60 to 89 Days past due | Non-PCI Loans | Noncommercial | Construction and land development |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 53 | 669 |  |
60 to 89 Days past due | Non-PCI Loans | Noncommercial | Mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 5,822 | 7,536 |  |
60 to 89 Days past due | Non-PCI Loans | Noncommercial | Revolving mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 2,359 | 3,704 |  |
60 to 89 Days past due | Non-PCI Loans | Noncommercial | Consumer |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 2,476 | 1,822 |  |
30 to 59 Days past due | PCI Loans | Noncommercial |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 10,506 | 13,531 |  |
30 to 59 Days past due | PCI Loans | Noncommercial | Construction and land development |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 0 | 0 |  |
30 to 59 Days past due | PCI Loans | Noncommercial | Mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 9,719 | 12,318 |  |
30 to 59 Days past due | PCI Loans | Noncommercial | Revolving mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 705 | 1,127 |  |
30 to 59 Days past due | PCI Loans | Noncommercial | Consumer |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 82 | 86 |  |
30 to 59 Days past due | Non-PCI Loans |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 52,866 | 63,522 |  |
30 to 59 Days past due | Non-PCI Loans | Commercial | Construction and land development |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 1,357 | 987 |  |
30 to 59 Days past due | Non-PCI Loans | Commercial | Mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 10,877 | 13,023 |  |
30 to 59 Days past due | Non-PCI Loans | Commercial | Other commercial real estate |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 989 | 884 |  |
30 to 59 Days past due | Non-PCI Loans | Commercial | Commercial and industrial |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 4,061 | 2,133 |  |
30 to 59 Days past due | Non-PCI Loans | Commercial | Lease financing |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 1,152 | 2,070 |  |
30 to 59 Days past due | Non-PCI Loans | Commercial | Other |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 319 | 3 |  |
30 to 59 Days past due | Non-PCI Loans | Noncommercial |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 34,111 | 44,422 |  |
30 to 59 Days past due | Non-PCI Loans | Noncommercial | Construction and land development |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 2,405 | 3,211 |  |
30 to 59 Days past due | Non-PCI Loans | Noncommercial | Mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 18,992 | 23,960 |  |
30 to 59 Days past due | Non-PCI Loans | Noncommercial | Revolving mortgage |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | 8,039 | 11,706 |  |
30 to 59 Days past due | Non-PCI Loans | Noncommercial | Consumer |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past due loans | $ 4,675 | $ 5,545 |  |

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