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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 |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing Receivable, Modifications, Recorded Investment | $ 153,517 |  | $ 156,130
Unpaid principal balance | 810,683 | $ 1,108,379 |
Loans and Leases Receivable, Net Amount | 25,235,010 |  | 25,299,564
Non-PCI impaired loans less than $500,000 collectively evaluated | 44,800 |  | 47,100
Commercial |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing Receivable, Modifications, Recorded Investment | 71,021 |  | 74,560
Commercial | Construction and land development |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing Receivable, Modifications, Recorded Investment | 2,243 |  | 2,298
Commercial | Mortgage |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing Receivable, Modifications, Recorded Investment | 57,855 |  | 61,065
Commercial | Other commercial real estate |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing Receivable, Modifications, Recorded Investment | 541 |  | 860
Commercial | Commercial and industrial |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing Receivable, Modifications, Recorded Investment | 10,045 |  | 10,046
Commercial | Other |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing Receivable, Modifications, Recorded Investment | 337 |  | 291
Noncommercial |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing Receivable, Modifications, Recorded Investment | 82,496 |  | 81,570
Noncommercial | Construction and land development |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing Receivable, Modifications, Recorded Investment | 2,330 |  | 2,337
Noncommercial | Consumer and Other |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing Receivable, Modifications, Recorded Investment | 2,953 |  | 3,021
Noncommercial | Mortgage |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing Receivable, Modifications, Recorded Investment | 47,693 |  | 47,524
Noncommercial | Revolving mortgage |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing Receivable, Modifications, Recorded Investment | 29,520 |  | 28,688
PCI Loans |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing Receivable, Modifications, Recorded Investment | 17,921 |  | 18,220
Acquired loans which have adverse change in expected cash flows | 160,400 |  | 186,600
Provision for Loan, Lease, and Other Losses | (164) | 2,354 |
Financing Receivable, Allowance for Credit Losses, Write-downs | 0 | (84) |
Recoveries | 0 | 0 |
Non-PCI Loans |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 167,080 |  | 163,902
ALLL for loans and leases individually evaluated for impairment | 11,965 |  | 9,827
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 122,376 |  | 115,073
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 27,625 |  | 31,357
Financing Receivable, Individually Evaluated for Impairment | 150,001 |  | 146,430
Average balance | 147,891 | 155,025 |
Interest income recognized | 1,339 | 1,372 |
Provision for Loan, Lease, and Other Losses | 11,914 | 5,251 |
Financing Receivable, Allowance for Credit Losses, Write-downs | (10,154) | (9,613) |
Recoveries | 3,467 | 3,315 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 207,830 |  | 204,741
Financing Receivable, Collectively Evaluated for Impairment | 24,756,428 |  | 24,770,270
Loans and Leases Receivable, Net Amount | 24,906,429 |  | 24,916,700
Non-PCI Loans | Commercial | Construction and land development |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 2,538 |  | 2,606
ALLL for loans and leases individually evaluated for impairment | 533 |  | 490
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 1,932 |  | 1,897
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 191 |  | 278
Financing Receivable, Individually Evaluated for Impairment | 2,123 |  | 2,175
Average balance | 2,147 | 1,155 |
Interest income recognized | 28 | 11 |
Provision for Loan, Lease, and Other Losses | 2,119 | 2,225 |
Financing Receivable, Allowance for Credit Losses, Write-downs | (44) | 0 |
Recoveries | 131 | 23 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 36,943 |  | 34,780
Financing Receivable, Collectively Evaluated for Impairment | 802,340 |  | 755,679
Loans and Leases Receivable, Net Amount | 804,463 |  | 757,854
Non-PCI Loans | Commercial | Mortgage |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 61,845 |  | 61,317
ALLL for loans and leases individually evaluated for impairment | 2,949 |  | 2,671
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 37,575 |  | 34,177
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 18,582 |  | 21,270
Financing Receivable, Individually Evaluated for Impairment | 56,157 |  | 55,447
Average balance | 56,629 | 72,267 |
Interest income recognized | 564 | 711 |
Provision for Loan, Lease, and Other Losses | 2,371 | (1,365) |
Financing Receivable, Allowance for Credit Losses, Write-downs | (761) | (46) |
Recoveries | 220 | 239 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 42,332 |  | 40,780
Financing Receivable, Collectively Evaluated for Impairment | 10,691,558 |  | 10,661,787
Loans and Leases Receivable, Net Amount | 10,747,715 |  | 10,717,234
Non-PCI Loans | Commercial | Other commercial real estate |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 629 |  | 946
ALLL for loans and leases individually evaluated for impairment | 16 |  | 42
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 222 |  | 243
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 319 |  | 617
Financing Receivable, Individually Evaluated for Impairment | 541 |  | 860
Average balance | 685 | 1,713 |
Interest income recognized | 8 | 11 |
Provision for Loan, Lease, and Other Losses | (83) | (1,293) |
Financing Receivable, Allowance for Credit Losses, Write-downs | 0 | 0 |
Recoveries | 1 | 145 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 2,383 |  | 2,439
Financing Receivable, Collectively Evaluated for Impairment | 426,878 |  | 426,125
Loans and Leases Receivable, Net Amount | 427,419 |  | 426,985
Non-PCI Loans | Commercial | Commercial and industrial |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 14,002 |  | 14,695
ALLL for loans and leases individually evaluated for impairment | 1,420 |  | 1,137
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 7,613 |  | 7,153
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 2,374 |  | 2,715
Financing Receivable, Individually Evaluated for Impairment | 9,987 |  | 9,868
Average balance | 10,000 | 9,762 |
Interest income recognized | 100 | 87 |
Provision for Loan, Lease, and Other Losses | 2,725 | 562 |
Financing Receivable, Allowance for Credit Losses, Write-downs | (1,858) | (2,329) |
Recoveries | 538 | 1,260 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 55,605 |  | 54,483
Financing Receivable, Collectively Evaluated for Impairment | 3,869,588 |  | 3,928,862
Loans and Leases Receivable, Net Amount | 3,879,575 |  | 3,938,730
Non-PCI Loans | Commercial | Other |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 353 |  | 301
ALLL for loans and leases individually evaluated for impairment | 151 |  | 105
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 262 |  | 216
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 75 |  | 75
Financing Receivable, Individually Evaluated for Impairment | 337 |  | 291
Average balance | 315 | 0 |
Interest income recognized | 2 | 0 |
Provision for Loan, Lease, and Other Losses | (498) | 114 |
Financing Receivable, Allowance for Credit Losses, Write-downs | 0 | (3) |
Recoveries | 444 | 42 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 2,016 |  | 2,116
Financing Receivable, Collectively Evaluated for Impairment | 280,511 |  | 296,133
Loans and Leases Receivable, Net Amount | 280,848 |  | 296,424
Non-PCI Loans | Noncommercial | Construction and land development |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 4,045 |  | 4,035
ALLL for loans and leases individually evaluated for impairment | 99 |  | 81
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 2,330 |  | 2,337
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 1,412 |  | 1,412
Financing Receivable, Individually Evaluated for Impairment | 3,742 |  | 3,749
Average balance | 3,747 | 4,104 |
Interest income recognized | 36 | 48 |
Provision for Loan, Lease, and Other Losses | 123 | 107 |
Financing Receivable, Allowance for Credit Losses, Write-downs | 0 | (182) |
Recoveries | 0 | 26 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 2,374 |  | 2,269
Financing Receivable, Collectively Evaluated for Impairment | 255,217 |  | 253,281
Loans and Leases Receivable, Net Amount | 258,959 |  | 257,030
Non-PCI Loans | Noncommercial | Mortgage |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 48,216 |  | 45,226
ALLL for loans and leases individually evaluated for impairment | 3,149 |  | 1,901
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 43,553 |  | 40,359
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 1,391 |  | 1,809
Financing Receivable, Individually Evaluated for Impairment | 44,944 |  | 42,168
Average balance | 42,626 | 38,724 |
Interest income recognized | 325 | 275 |
Provision for Loan, Lease, and Other Losses | 1,508 | 1,512 |
Financing Receivable, Allowance for Credit Losses, Write-downs | (166) | (806) |
Recoveries | 173 | 77 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 13,838 |  | 13,571
Financing Receivable, Collectively Evaluated for Impairment | 4,258,193 |  | 4,223,519
Loans and Leases Receivable, Net Amount | 4,303,137 |  | 4,265,687
Non-PCI Loans | Noncommercial | Revolving mortgage |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 32,074 |  | 31,371
ALLL for loans and leases individually evaluated for impairment | 2,742 |  | 2,515
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 26,017 |  | 25,751
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 3,199 |  | 3,101
Financing Receivable, Individually Evaluated for Impairment | 29,216 |  | 28,852
Average balance | 28,742 | 24,792 |
Interest income recognized | 247 | 201 |
Provision for Loan, Lease, and Other Losses | 209 | 466 |
Financing Receivable, Allowance for Credit Losses, Write-downs | (963) | (992) |
Recoveries | 387 | 194 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 18,753 |  | 19,347
Financing Receivable, Collectively Evaluated for Impairment | 2,440,682 |  | 2,514,123
Loans and Leases Receivable, Net Amount | 2,469,898 |  | 2,542,975
Non-PCI Loans | Noncommercial | Consumer |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Unpaid principal balance | 3,378 |  | 3,405
ALLL for loans and leases individually evaluated for impairment | 906 |  | 885
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 2,872 |  | 2,940
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 82 |  | 80
Financing Receivable, Individually Evaluated for Impairment | 2,954 |  | 3,020
Average balance | 3,000 | 2,508 |
Interest income recognized | 29 | 28 |
Provision for Loan, Lease, and Other Losses | 3,440 | 2,923 |
Financing Receivable, Allowance for Credit Losses, Write-downs | (6,362) | (5,255) |
Recoveries | 1,573 | $ 1,309 |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 33,586 |  | 34,956
Financing Receivable, Collectively Evaluated for Impairment | 1,731,461 |  | 1,710,761
Loans and Leases Receivable, Net Amount | $ 1,734,415 |  | $ 1,713,781

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