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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, 2016 | Dec. 31, 2015
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | $ 20,928,709 | $ 19,289,474
Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 13,760,703 | 12,630,489
Commercial | Construction and land development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 649,157 | 620,352
Commercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 9,026,220 | 8,274,548
Commercial | Other commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 351,291 | 321,021
Commercial | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 2,567,501 | 2,368,958
Commercial | Lease financing |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 826,270 | 730,778
Commercial | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 340,264 | 314,832
Noncommercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 7,168,006 | 6,658,985
Noncommercial | Construction and land development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 231,400 | 220,073
Noncommercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 2,889,124 | 2,695,985
Noncommercial | Revolving mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 2,601,344 | 2,523,106
Noncommercial | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-PCI Loans | 1,446,138 | 1,219,821
Non-PCI Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 129,252 | 121,576
Current | 20,799,457 | 19,167,898
Non-PCI Loans | 20,928,709 | 19,289,474
Non-PCI Loans | Commercial | Construction and land development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 2,170 | 1,733
Current | 646,987 | 618,619
Non-PCI Loans | 649,157 | 620,352
Non-PCI Loans | Commercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 24,694 | 30,964
Current | 9,001,526 | 8,243,584
Non-PCI Loans | 9,026,220 | 8,274,548
Non-PCI Loans | Commercial | Other commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 310 | 1,026
Current | 350,981 | 319,995
Non-PCI Loans | 351,291 | 321,021
Non-PCI Loans | Commercial | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 11,071 | 4,992
Current | 2,556,430 | 2,363,966
Non-PCI Loans | 2,567,501 | 2,368,958
Non-PCI Loans | Commercial | Lease financing |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 2,482 | 2,236
Current | 823,788 | 728,542
Non-PCI Loans | 826,270 | 730,778
Non-PCI Loans | Commercial | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 270 | 301
Current | 339,994 | 314,531
Non-PCI Loans | 340,264 | 314,832
Non-PCI Loans | Noncommercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 7,079,751 | 6,578,661
Non-PCI Loans | 7,168,006 | 6,658,985
Non-PCI Loans | Noncommercial | Construction and land development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 2,294 | 5,518
Current | 229,106 | 214,555
Non-PCI Loans | 231,400 | 220,073
Non-PCI Loans | Noncommercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 50,079 | 44,776
Current | 2,839,045 | 2,651,209
Non-PCI Loans | 2,889,124 | 2,695,985
Non-PCI Loans | Noncommercial | Revolving mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 24,402 | 21,041
Current | 2,576,942 | 2,502,065
Non-PCI Loans | 2,601,344 | 2,523,106
Non-PCI Loans | Noncommercial | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 11,480 | 8,989
Current | 1,434,658 | 1,210,832
Non-PCI Loans | 1,446,138 | 1,219,821
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 72,876 | 63,522
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 | 1,845 | 987
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Commercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 11,592 | 13,023
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 | 310 | 884
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 | 7,918 | 2,133
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Commercial | Lease financing |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 1,175 | 2,070
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Commercial | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 72 | 3
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Noncommercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 49,964 | 44,422
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 | 1,139 | 3,211
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 27,760 | 23,960
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Revolving mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 14,290 | 11,706
Financing Receivables, 30 to 59 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 6,775 | 5,545
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 18,472 | 18,705
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 | 39 | 283
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Commercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 2,773 | 3,446
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 | 0
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 | 2,102 | 1,079
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Commercial | Lease financing |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 444 | 2
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Commercial | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 0 | 164
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Noncommercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 13,114 | 13,731
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 | 598 | 669
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 7,039 | 7,536
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Revolving mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 2,698 | 3,704
Financing Receivables, 60 to 89 Days Past Due [Member] | Non-PCI Loans | Noncommercial | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 2,779 | 1,822
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Non-PCI Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 37,904 | 39,349
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 | 286 | 463
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 | 10,329 | 14,495
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 | 0 | 142
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 | 1,051 | 1,780
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 | 863 | 164
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 | 198 | 134
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Non-PCI Loans | Noncommercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total | 25,177 | 22,171
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 | 557 | 1,638
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 | 15,280 | 13,280
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 | 7,414 | 5,631
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 | $ 1,926 | $ 1,622

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