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Allowance for Loan and Lease Losses (Allocation of Allowance for Loan and Lease Losses) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Unpaid principal balance | $ 1,788,136 | $ 1,754,882 | $ 1,788,136 | $ 1,754,882 |
Allowance for loan and lease losses | 205,463 |  | 205,463 |  | $ 204,466
Loans and Leases Receivable, Net Amount | 19,650,343 |  | 19,650,343 |  | 18,564,999
PCI Loans |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Acquired loans which have adverse change in expected cash flows | 514,800 |  | 514,800 |  | 285,600
Provision for Loan, Lease, and Other Losses | 2,769 | (197) | (1,370) | (11,999) |
Provision Expense And Accretion Income Reclassification | 3,900 |  |  |  |
Financing Receivable, Allowance for Credit Losses, Write-downs | 680 | 3,334 | 2,702 | 15,721 |
Recoveries | 0 | 0 | 0 | 0 |
PCI Loans | Commercial | Construction and land development |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Provision for Loan, Lease, and Other Losses | 632 | (1,815) | 1,148 | 1,463 |
Financing Receivable, Allowance for Credit Losses, Write-downs | 0 | 1,633 | 97 | 2,428 |
Recoveries | 0 | 0 | 0 | 0 |
PCI Loans | Commercial | Mortgage |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Provision for Loan, Lease, and Other Losses | 2,187 | (2,374) | (803) | (6,946) |
Financing Receivable, Allowance for Credit Losses, Write-downs | 48 | 2,357 | 765 | 10,376 |
Recoveries | 0 | 0 | 0 | 0 |
PCI Loans | Commercial | Other commercial real estate |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Provision for Loan, Lease, and Other Losses | $ 235 | (435) | 229 | (1,382) |
Financing Receivable, Allowance for Credit Losses, Write-downs |  | (106) | 0 | (106) |
Recoveries | $ 0 | 0 | 0 | 0 |
PCI Loans | Commercial | Commercial and industrial |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Provision for Loan, Lease, and Other Losses | 118 | 182 | (514) | (1,883) |
Financing Receivable, Allowance for Credit Losses, Write-downs | 39 | (839) | 324 | 1,996 |
Recoveries | 0 | 0 | 0 | 0 |
PCI Loans | Noncommerical | Construction and land development |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Provision for Loan, Lease, and Other Losses | 0 | 239 | (183) | (443) |
Financing Receivable, Allowance for Credit Losses, Write-downs | 0 | 83 | 0 | 83 |
Recoveries | 0 | 0 | 0 | 0 |
PCI Loans | Noncommerical | Consumer and Other |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Provision for Loan, Lease, and Other Losses | 29 | (80) | 650 | (21) |
Financing Receivable, Allowance for Credit Losses, Write-downs | 1 | 17 | 463 | 41 |
Recoveries | 0 | 0 | 0 | 0 |
PCI Loans | Noncommerical | Mortgage |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Provision for Loan, Lease, and Other Losses | (281) | 187 | 21 | (4,289) |
Financing Receivable, Allowance for Credit Losses, Write-downs | 15 | 188 | 295 | 421 |
Recoveries | 0 | 0 | 0 | 0 |
PCI Loans | Noncommerical | Revolving mortgage |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Provision for Loan, Lease, and Other Losses | (151) | 3,899 | (1,918) | 1,502 |
Financing Receivable, Allowance for Credit Losses, Write-downs | 577 | 1 | 758 | 482 |
Recoveries | 0 | 0 | 0 | 0 |
Non-PCI Loans |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Total impaired noncovered loans and leases | 142,962 |  | 142,962 |  | 119,593
Unpaid principal balance | 159,307 |  | 159,307 |  | 133,466
Impaired Financing Receivable, Related Allowance | 8,491 |  | 8,491 |  | 15,717
ALLL for loans and leases individually evaluated for impairment | 8,491 |  | 8,491 |  | 15,717
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 67,619 |  | 67,619 |  | 87,007
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 75,343 |  | 75,343 |  | 32,586
Financing Receivable, Individually Evaluated for Impairment | 142,962 |  | 142,962 |  | 119,593
Average balance | 151,108 | 128,431 | 132,864 | 128,357 |
Interest income recognized | 1,218 | 1,139 | 3,528 | 3,782 |
Provision for Loan, Lease, and Other Losses | (2,662) | 1,734 | 14,988 | 4,334 |
Financing Receivable, Allowance for Credit Losses, Write-downs | 5,018 | 5,387 | 17,098 | 14,578 |
Recoveries | 2,737 | 1,843 | 7,179 | 5,475 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 179,415 |  | 179,415 |  | 167,120
Financing Receivable, Collectively Evaluated for Impairment | 18,668,780 |  | 18,668,780 |  | 17,463,374
Loans and Leases Receivable, Net Amount | 18,811,742 |  | 18,811,742 |  | 17,582,967
Non-PCI Loans | Commercial | Construction and land development |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Unpaid principal balance | 4,594 |  | 4,594 |  | 6,945
ALLL for loans and leases individually evaluated for impairment | 417 |  | 417 |  | 92
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 1,799 |  | 1,799 |  | 996
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 1,395 |  | 1,395 |  | 624
Financing Receivable, Individually Evaluated for Impairment | 3,194 |  | 3,194 |  | 1,620
Average balance | 3,257 | 2,296 | 3,148 | 1,701 |
Interest income recognized | 37 | 26 | 107 | 57 |
Provision for Loan, Lease, and Other Losses | 1,189 | 1,469 | 2,380 | 2,219 |
Financing Receivable, Allowance for Credit Losses, Write-downs | 336 | 0 | 575 | 0 |
Recoveries | 129 | 15 | 295 | 46 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 13,644 |  | 13,644 |  | 11,869
Financing Receivable, Collectively Evaluated for Impairment | 560,732 |  | 560,732 |  | 491,513
Loans and Leases Receivable, Net Amount | 563,926 |  | 563,926 |  | 493,133
Non-PCI Loans | Commercial | Mortgage |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Unpaid principal balance | 100,914 |  | 100,914 |  | 87,702
ALLL for loans and leases individually evaluated for impairment | 4,007 |  | 4,007 |  | 8,610
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 42,562 |  | 42,562 |  | 57,324
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 50,183 |  | 50,183 |  | 25,479
Financing Receivable, Individually Evaluated for Impairment | 92,745 |  | 92,745 |  | 82,803
Average balance | 99,613 | 90,318 | 88,614 | 86,131 |
Interest income recognized | 803 | 806 | 2,405 | 2,522 |
Provision for Loan, Lease, and Other Losses | (5,664) | (8,082) | (11,221) | (17,021) |
Financing Receivable, Allowance for Credit Losses, Write-downs | 411 | 277 | 691 | 718 |
Recoveries | 794 | 476 | 1,878 | 1,728 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 71,148 |  | 71,148 |  | 76,579
Financing Receivable, Collectively Evaluated for Impairment | 7,984,201 |  | 7,984,201 |  | 7,470,145
Loans and Leases Receivable, Net Amount | 8,076,946 |  | 8,076,946 |  | 7,552,948
Non-PCI Loans | Commercial | Other commercial real estate |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Unpaid principal balance | 868 |  | 868 |  | 913
ALLL for loans and leases individually evaluated for impairment | 295 |  | 295 |  | 112
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 312 |  | 312 |  | 112
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 124 |  | 124 |  | 472
Financing Receivable, Individually Evaluated for Impairment | 436 |  | 436 |  | 584
Average balance | 539 | 1,980 | 498 | 2,474 |
Interest income recognized | 6 | 7 | 7 | 67 |
Provision for Loan, Lease, and Other Losses | 291 | 61 | 522 | (167) |
Financing Receivable, Allowance for Credit Losses, Write-downs | 0 | 0 | 178 | 0 |
Recoveries | 15 | 8 | 34 | 33 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 815 |  | 815 |  | 620
Financing Receivable, Collectively Evaluated for Impairment | 316,488 |  | 316,488 |  | 244,291
Loans and Leases Receivable, Net Amount | 316,924 |  | 316,924 |  | 244,875
Non-PCI Loans | Commercial | Commercial and industrial |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Unpaid principal balance | 19,608 |  | 19,608 |  | 12,197
ALLL for loans and leases individually evaluated for impairment | 1,154 |  | 1,154 |  | 1,743
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 5,352 |  | 5,352 |  | 10,319
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 11,043 |  | 11,043 |  | 721
Financing Receivable, Individually Evaluated for Impairment | 16,395 |  | 16,395 |  | 11,040
Average balance | 17,005 | 11,699 | 13,815 | 14,227 |
Interest income recognized | 130 | 108 | 379 | 461 |
Provision for Loan, Lease, and Other Losses | (799) | 4,361 | 11,294 | 9,369 |
Financing Receivable, Allowance for Credit Losses, Write-downs | 784 | 1,414 | 4,815 | 2,440 |
Recoveries | 296 | 227 | 899 | 792 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 36,951 |  | 36,951 |  | 28,984
Financing Receivable, Collectively Evaluated for Impairment | 2,195,578 |  | 2,195,578 |  | 1,977,894
Loans and Leases Receivable, Net Amount | 2,211,973 |  | 2,211,973 |  | 1,988,934
Non-PCI Loans | Commercial | Lease financing |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Unpaid principal balance | 1,908 |  | 1,908 |  | 623
ALLL for loans and leases individually evaluated for impairment | 291 |  | 291 |  | 150
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 1,610 |  | 1,610 |  | 319
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 298 |  | 298 |  | 304
Financing Receivable, Individually Evaluated for Impairment | 1,908 |  | 1,908 |  | 623
Average balance | 1,939 | 312 | 1,664 | 589 |
Interest income recognized | 21 | 5 | 55 | 26 |
Provision for Loan, Lease, and Other Losses | 424 | (71) | 843 | (420) |
Financing Receivable, Allowance for Credit Losses, Write-downs | 7 | 28 | 28 | 100 |
Recoveries | 16 | 34 | 38 | 71 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 4,848 |  | 4,848 |  | 4,136
Financing Receivable, Collectively Evaluated for Impairment | 690,007 |  | 690,007 |  | 571,293
Loans and Leases Receivable, Net Amount | 691,915 |  | 691,915 |  | 571,916
Non-PCI Loans | Commercial | Other |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Unpaid principal balance | 1,540 |  | 1,540 |  | 2,000
ALLL for loans and leases individually evaluated for impairment | 67 |  | 67 |  | 1,972
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 1,464 |  | 1,464 |  | 2,000
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 0 |  | 0 |  | 0
Financing Receivable, Individually Evaluated for Impairment | 1,464 |  | 1,464 |  | 2,000
Average balance | 1,543 | 42 | 1,789 | 29 |
Interest income recognized | 20 | 1 | 20 | 2 |
Provision for Loan, Lease, and Other Losses | (58) | 127 | (2,100) | 562 |
Financing Receivable, Allowance for Credit Losses, Write-downs | 0 | 0 | 0 | 13 |
Recoveries | 45 | 0 | 91 | 0 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 1,108 |  | 1,108 |  | 1,212
Financing Receivable, Collectively Evaluated for Impairment | 356,296 |  | 356,296 |  | 351,833
Loans and Leases Receivable, Net Amount | 357,760 |  | 357,760 |  | 353,833
Non-PCI Loans | Noncommerical | Construction and land development |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Unpaid principal balance | 1,045 |  | 1,045 |  | 1,340
ALLL for loans and leases individually evaluated for impairment | 78 |  | 78 |  | 71
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 1,045 |  | 1,045 |  | 1,077
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 0 |  | 0 |  | 263
Financing Receivable, Individually Evaluated for Impairment | 1,045 |  | 1,045 |  | 1,340
Average balance | 1,027 | 1,942 | 821 | 1,902 |
Interest income recognized | 12 | 27 | 28 | 77 |
Provision for Loan, Lease, and Other Losses | 114 | 21 | 306 | 274 |
Financing Receivable, Allowance for Credit Losses, Write-downs | 0 | 45 | 22 | 138 |
Recoveries | 3 | 14 | 74 | 78 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 1,172 |  | 1,172 |  | 821
Financing Receivable, Collectively Evaluated for Impairment | 219,448 |  | 219,448 |  | 203,676
Loans and Leases Receivable, Net Amount | 220,493 |  | 220,493 |  | 205,016
Non-PCI Loans | Noncommerical | Mortgage |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Unpaid principal balance | 21,559 |  | 21,559 |  | 15,746
ALLL for loans and leases individually evaluated for impairment | 1,158 |  | 1,158 |  | 1,360
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 9,746 |  | 9,746 |  | 10,198
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 9,945 |  | 9,945 |  | 4,715
Financing Receivable, Individually Evaluated for Impairment | 19,691 |  | 19,691 |  | 14,913
Average balance | 19,945 | 15,071 | 17,376 | 15,525 |
Interest income recognized | 141 | 111 | 401 | 395 |
Provision for Loan, Lease, and Other Losses | 520 | 15 | 2,495 | (933) |
Financing Receivable, Allowance for Credit Losses, Write-downs | 394 | 231 | 768 | 649 |
Recoveries | 314 | 28 | 757 | 184 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 11,987 |  | 11,987 |  | 9,301
Financing Receivable, Collectively Evaluated for Impairment | 2,640,130 |  | 2,640,130 |  | 2,478,145
Loans and Leases Receivable, Net Amount | 2,659,821 |  | 2,659,821 |  | 2,493,058
Non-PCI Loans | Noncommerical | Revolving mortgage |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Unpaid principal balance | 6,137 |  | 6,137 |  | 4,933
ALLL for loans and leases individually evaluated for impairment | 526 |  | 526 |  | 1,052
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 2,852 |  | 2,852 |  | 3,675
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 2,134 |  | 2,134 |  | 0
Financing Receivable, Individually Evaluated for Impairment | 4,986 |  | 4,986 |  | 3,675
Average balance | 5,064 | 3,708 | 4,022 | 4,069 |
Interest income recognized | 29 | 29 | 68 | 105 |
Provision for Loan, Lease, and Other Losses | 871 | 2,075 | 440 | 4,681 |
Financing Receivable, Allowance for Credit Losses, Write-downs | 677 | 925 | 2,086 | 3,249 |
Recoveries | 363 | 174 | 843 | 450 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 17,321 |  | 17,321 |  | 17,598
Financing Receivable, Collectively Evaluated for Impairment | 2,514,986 |  | 2,514,986 |  | 2,558,125
Loans and Leases Receivable, Net Amount | 2,519,972 |  | 2,519,972 |  | 2,561,800
Non-PCI Loans | Noncommerical | Consumer |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Unpaid principal balance | 1,134 |  | 1,134 |  | 1,067
ALLL for loans and leases individually evaluated for impairment | 498 |  | 498 |  | 555
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 877 |  | 877 |  | 987
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 221 |  | 221 |  | 8
Financing Receivable, Individually Evaluated for Impairment | 1,098 |  | 1,098 |  | 995
Average balance | 1,176 | 1,063 | 1,117 | 1,710 |
Interest income recognized | 19 | 19 | 58 | 70 |
Provision for Loan, Lease, and Other Losses | 450 | 1,758 | 10,029 | 5,770 |
Financing Receivable, Allowance for Credit Losses, Write-downs | 2,409 | 2,467 | 7,935 | 7,271 |
Recoveries | 762 | $ 867 | 2,270 | $ 2,093 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 20,421 |  | 20,421 |  | 16,000
Financing Receivable, Collectively Evaluated for Impairment | 1,190,914 |  | 1,190,914 |  | 1,116,459
Loans and Leases Receivable, Net Amount | $ 1,192,012 |  | $ 1,192,012 |  | $ 1,117,454

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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 + Details
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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5258-111524 + Details
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- Definition Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5212-111524 + Details
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