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Loans and Leases (Aging Of The Outstanding Loans and Leases By Class Excluding Loans Impaired At Acquisition Date) (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | $ 19,289,474 | $ 17,582,967
Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 12,630,489 | 11,205,639
Commercial | Construction and land development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 620,352 | 493,133
Commercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 8,274,548 | 7,552,948
Commercial | Other commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 321,021 | 244,875
Commercial | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 2,368,958 | 1,988,934
Commercial | Lease financing |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 730,778 | 571,916
Commercial | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 314,832 | 353,833
Noncommercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 6,658,985 | 6,377,328
Noncommercial | Construction and land development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 220,073 | 205,016
Noncommercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 2,695,985 | 2,493,058
Noncommercial | Revolving mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 2,523,106 | 2,561,800
Noncommercial | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 1,219,821 | 1,117,454
Non-PCI Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 121,576 | 101,467
Current | 19,167,898 | 17,481,500
Non-PCI Loans | 19,289,474 | 17,582,967
Non-PCI Loans | Commercial | Construction and land development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 1,733 | 1,133
Current | 618,619 | 492,000
Non-PCI Loans | 620,352 | 493,133
Non-PCI Loans | Commercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 30,964 | 24,210
Current | 8,243,584 | 7,528,738
Non-PCI Loans | 8,274,548 | 7,552,948
Non-PCI Loans | Commercial | Other commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 1,026 | 378
Current | 319,995 | 244,497
Non-PCI Loans | 321,021 | 244,875
Non-PCI Loans | Commercial | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 4,992 | 4,766
Current | 2,363,966 | 1,984,168
Non-PCI Loans | 2,368,958 | 1,988,934
Non-PCI Loans | Commercial | Lease financing |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 2,236 | 1,641
Current | 728,542 | 570,275
Non-PCI Loans | 730,778 | 571,916
Non-PCI Loans | Commercial | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 301 | 2,112
Current | 314,531 | 351,721
Non-PCI Loans | 314,832 | 353,833
Non-PCI Loans | Noncommercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 6,578,661 | 6,310,101
Non-PCI Loans | 6,658,985 | 6,377,328
Non-PCI Loans | Noncommercial | Construction and land development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 5,518 | 2,672
Current | 214,555 | 202,344
Non-PCI Loans | 220,073 | 205,016
Non-PCI Loans | Noncommercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 44,776 | 38,261
Current | 2,651,209 | 2,454,797
Non-PCI Loans | 2,695,985 | 2,493,058
Non-PCI Loans | Noncommercial | Revolving mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 21,041 | 18,993
Current | 2,502,065 | 2,542,807
Non-PCI Loans | 2,523,106 | 2,561,800
Non-PCI Loans | Noncommercial | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 8,989 | 7,301
Current | 1,210,832 | 1,110,153
Non-PCI Loans | 1,219,821 | 1,117,454
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 63,522 | 57,321
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Commercial | Construction and land development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 987 | 520
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Commercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 13,023 | 11,367
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Commercial | Other commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 884 | 206
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Commercial | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 2,133 | 2,843
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Commercial | Lease financing |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 2,070 | 1,631
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Commercial | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 3 | 146
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Noncommercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 44,422 | 40,608
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Construction and land development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 3,211 | 1,646
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 23,960 | 23,288
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Revolving mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 11,706 | 11,097
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 5,545 | 4,577
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 18,705 | 19,548
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Commercial | Construction and land development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 283 | 283
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Commercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 3,446 | 4,782
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Commercial | Other commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 0 | 70
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Commercial | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 1,079 | 1,545
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Commercial | Lease financing |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 2 | 8
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Commercial | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 164 | 1,966
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Noncommercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 13,731 | 10,894
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Construction and land development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 669 | 824
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 7,536 | 6,018
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Revolving mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 3,704 | 2,433
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 1,822 | 1,619
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Non-PCI Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 39,349 | 24,598
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Non-PCI Loans | Commercial | Construction and land development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 463 | 330
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Non-PCI Loans | Commercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 14,495 | 8,061
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Non-PCI Loans | Commercial | Other commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 142 | 102
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Non-PCI Loans | Commercial | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 1,780 | 378
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Non-PCI Loans | Commercial | Lease financing |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 164 | 2
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Non-PCI Loans | Commercial | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 134 | 0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Non-PCI Loans | Noncommercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 22,171 | 15,725
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Construction and land development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 1,638 | 202
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 13,280 | 8,955
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Revolving mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 5,631 | 5,463
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | $ 1,622 | $ 1,105

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