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Loans and Leases (Composition of the Loans and Leases Outstanding By Credit Quality Indicator) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | $ 1,270,818 | $ 1,029,426
Total Originated Loans and Leases | 12,200,226 | 12,104,298
Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 601,902 | 492,831
Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 169,325 | 155,750
Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 305,724 | 300,048
Doubtful |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 53,945 | 61,121
Ungraded |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 139,922 | 19,676
Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 923,076 | 781,307
Total Originated Loans and Leases | 8,592,732 | 8,499,348
Commercial | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 106,670 | 78,915
Total Originated Loans and Leases | 335,271 | 319,847
Commercial | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 728,872 | 642,891
Total Originated Loans and Leases | 6,330,843 | 6,362,490
Commercial | Other commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 47,826 | 41,381
Total Originated Loans and Leases | 177,082 | 178,754
Commercial | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 38,838 | 17,254
Total Originated Loans and Leases | 1,175,543 | 1,081,158
Commercial | Lease financing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Originated Loans and Leases | 394,268 | 381,763
Commercial | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 870 | 866
Total Originated Loans and Leases | 179,725 | 175,336
Commercial | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Originated Loans and Leases | 8,201,972 | 8,092,174
Commercial | Pass | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 14,789 | 2,619
Total Originated Loans and Leases | 323,876 | 308,231
Commercial | Pass | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 375,245 | 296,824
Total Originated Loans and Leases | 6,064,405 | 6,094,505
Commercial | Pass | Other commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 28,526 | 22,225
Total Originated Loans and Leases | 173,517 | 174,913
Commercial | Pass | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 29,918 | 8,021
Total Originated Loans and Leases | 1,074,210 | 964,840
Commercial | Pass | Lease financing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Originated Loans and Leases | 386,324 | 375,371
Commercial | Pass | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Originated Loans and Leases | 179,640 | 174,314
Commercial | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Originated Loans and Leases | 148,200 | 147,325
Commercial | Special Mention | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 24,065 | 15,530
Total Originated Loans and Leases | 8,442 | 8,620
Commercial | Special Mention | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 134,414 | 125,295
Total Originated Loans and Leases | 117,436 | 119,515
Commercial | Special Mention | Other commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 114 | 3,431
Total Originated Loans and Leases | 1,302 | 1,362
Commercial | Special Mention | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 3,260 | 2,585
Total Originated Loans and Leases | 16,777 | 14,686
Commercial | Special Mention | Lease financing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Originated Loans and Leases | 4,233 | 2,160
Commercial | Special Mention | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Originated Loans and Leases | 10 | 982
Commercial | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Originated Loans and Leases | 158,071 | 156,956
Commercial | Substandard | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 58,374 | 52,228
Total Originated Loans and Leases | 2,953 | 2,944
Commercial | Substandard | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 182,540 | 179,657
Total Originated Loans and Leases | 143,723 | 141,913
Commercial | Substandard | Other commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 10,473 | 7,012
Total Originated Loans and Leases | 2,119 | 2,216
Commercial | Substandard | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 4,686 | 5,225
Total Originated Loans and Leases | 6,051 | 6,352
Commercial | Substandard | Lease financing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Originated Loans and Leases | 3,155 | 3,491
Commercial | Substandard | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Originated Loans and Leases | 70 | 40
Commercial | Doubtful |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Originated Loans and Leases | 4,927 | 6,022
Commercial | Doubtful | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 5,101 | 7,436
Total Originated Loans and Leases | 0 | 52
Commercial | Doubtful | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 36,040 | 40,471
Total Originated Loans and Leases | 4,227 | 5,159
Commercial | Doubtful | Other commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 8,713 | 8,713
Total Originated Loans and Leases | 0 | 75
Commercial | Doubtful | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 954 | 1,257
Total Originated Loans and Leases | 152 | 144
Commercial | Doubtful | Lease financing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Originated Loans and Leases | 543 | 592
Commercial | Doubtful | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Originated Loans and Leases | 5 | 0
Commercial | Ungraded |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Originated Loans and Leases | 79,562 | 96,871
Commercial | Ungraded | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 4,341 | 1,102
Total Originated Loans and Leases | 0 | 0
Commercial | Ungraded | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 633 | 644
Total Originated Loans and Leases | 1,052 | 1,398
Commercial | Ungraded | Other commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 0 | 0
Total Originated Loans and Leases | 144 | 188
Commercial | Ungraded | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 20 | 166
Total Originated Loans and Leases | 78,353 | 95,136
Commercial | Ungraded | Lease financing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Originated Loans and Leases | 13 | 149
Commercial | Ungraded | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Originated Loans and Leases | 0 | 0
Noncommerical |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 347,742 | 248,119
Total Originated Loans and Leases | 3,607,494 | 3,604,950
Noncommerical | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 291,254 | 213,851
Total Originated Loans and Leases | 1,030,032 | 982,421
Noncommerical | Revolving mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 25,776 | 30,834
Total Originated Loans and Leases | 2,091,000 | 2,113,285
Noncommerical | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 28,151 | 2,583
Total Originated Loans and Leases | 119,049 | 122,792
Noncommerical | Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 2,561 | 851
Total Originated Loans and Leases | 367,413 | 386,452
Noncommerical | Consumer and Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 3,431 | 1,717
Noncommerical | Pass | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 131,765 | 135,326
Noncommerical | Pass | Revolving mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 20,240 | 26,322
Noncommerical | Pass | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 32 | 149
Noncommerical | Pass | Consumer and Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 1,387 | 1,345
Noncommerical | Special Mention | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 4,823 | 6,301
Noncommerical | Special Mention | Revolving mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 2,649 | 2,608
Noncommerical | Special Mention | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 0 | 0
Noncommerical | Special Mention | Consumer and Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 0 | 0
Noncommerical | Substandard | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 46,044 | 52,774
Noncommerical | Substandard | Revolving mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 1,891 | 1,013
Noncommerical | Substandard | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 1,716 | 2,139
Noncommerical | Substandard | Consumer and Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 0 | 0
Noncommerical | Doubtful | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 1,931 | 2,058
Noncommerical | Doubtful | Revolving mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 911 | 891
Noncommerical | Doubtful | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 295 | 295
Noncommerical | Doubtful | Consumer and Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 0 | 0
Noncommerical | Ungraded | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 106,691 | 17,392
Noncommerical | Ungraded | Revolving mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 85 | 0
Noncommerical | Ungraded | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 26,108 | 0
Noncommerical | Ungraded | Consumer and Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 2,044 | 372
Originated Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current | 12,101,606 | 12,015,067
Total Originated Loans and Leases | 12,200,226 | 12,104,298
30-59 Days Past Due | 60,308 | 44,167
60-89 Days Past Due | 11,246 | 14,236
90 Days or Greater | 27,066 | 30,828
Originated Loans | Commercial | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current | 333,895 | 317,778
Total Originated Loans and Leases | 335,271 | 319,847
30-59 Days Past Due | 537 | 1,603
60-89 Days Past Due | 184 | 9
90 Days or Greater | 655 | 457
Originated Loans | Commercial | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current | 6,291,210 | 6,333,351
Total Originated Loans and Leases | 6,330,843 | 6,362,490
30-59 Days Past Due | 24,451 | 11,131
60-89 Days Past Due | 3,934 | 3,601
90 Days or Greater | 11,248 | 14,407
Originated Loans | Commercial | Other commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current | 176,812 | 177,935
Total Originated Loans and Leases | 177,082 | 178,754
30-59 Days Past Due | 155 | 139
60-89 Days Past Due | 11 | 210
90 Days or Greater | 104 | 470
Originated Loans | Commercial | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current | 1,170,625 | 1,076,704
Total Originated Loans and Leases | 1,175,543 | 1,081,158
30-59 Days Past Due | 3,921 | 3,336
60-89 Days Past Due | 488 | 682
90 Days or Greater | 509 | 436
Originated Loans | Commercial | Lease financing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current | 393,096 | 379,532
Total Originated Loans and Leases | 394,268 | 381,763
30-59 Days Past Due | 757 | 789
60-89 Days Past Due | 323 | 1,341
90 Days or Greater | 92 | 101
Originated Loans | Commercial | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current | 179,700 | 175,251
Total Originated Loans and Leases | 179,725 | 175,336
30-59 Days Past Due | 20 | 0
60-89 Days Past Due | 5 | 85
90 Days or Greater | 0 | 0
Originated Loans | Noncommerical |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current | 3,556,268 | 3,554,516
Total Originated Loans and Leases | 3,607,494 | 3,604,950
30-59 Days Past Due | 30,467 | 27,169
60-89 Days Past Due | 6,301 | 8,308
90 Days or Greater | 14,458 | 14,957
Originated Loans | Noncommerical | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current | 1,003,016 | 955,300
Total Originated Loans and Leases | 1,030,032 | 982,421
30-59 Days Past Due | 16,845 | 12,885
60-89 Days Past Due | 1,063 | 4,658
90 Days or Greater | 9,108 | 9,578
Originated Loans | Noncommerical | Revolving mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current | 2,072,832 | 2,095,480
Total Originated Loans and Leases | 2,091,000 | 2,113,285
30-59 Days Past Due | 10,578 | 10,977
60-89 Days Past Due | 3,249 | 2,378
90 Days or Greater | 4,341 | 4,450
Originated Loans | Noncommerical | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current | 117,161 | 121,026
Total Originated Loans and Leases | 119,049 | 122,792
30-59 Days Past Due | 888 | 1,193
60-89 Days Past Due | 794 | 317
90 Days or Greater | 206 | 256
Originated Loans | Noncommerical | Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current | 363,259 | 382,710
Total Originated Loans and Leases | 367,413 | 386,452
30-59 Days Past Due | 2,156 | 2,114
60-89 Days Past Due | 1,195 | 955
90 Days or Greater | $ 803 | $ 673

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