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Allowance for Loan and Lease Losses (Note Restructurings During Period) (Details) - Non-PCI Loans $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($) loans | Dec. 31, 2018 USD ($) loans | Dec. 31, 2017 USD ($) loans
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 190 | 164 | 204
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 19,709 | $ 13,318 | $ 11,990
Financing Receivable, Modifications, Number of Contracts | loans | 505 | 491 | 632
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ | $ 52,169 | $ 43,554 | $ 49,000
Principal Forgiveness [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 3 | 0 | 1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 2,955 | $ 0 | $ 634
Financing Receivable, Modifications, Number of Contracts | loans | 18 | 3 | 6
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ | $ 5,613 | $ 1,003 | $ 1,206
Principal Forgiveness [Member] | Commercial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 1 | 0 | 1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 238 | $ 0 | $ 634
Financing Receivable, Modifications, Number of Contracts | loans | 11 | 3 | 5
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ | $ 1,595 | $ 1,003 | $ 1,124
Principal Forgiveness [Member] | Noncommercial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 2 | 0 | 0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 2,717 | $ 0 | $ 0
Financing Receivable, Modifications, Number of Contracts | loans | 7 | 0 | 1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ | $ 4,018 | $ 0 | $ 82
Extended Maturity [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 6 | 8 | 2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 839 | $ 865 | $ 273
Financing Receivable, Modifications, Number of Contracts | loans | 18 | 42 | 47
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ | $ 4,246 | $ 5,487 | $ 6,517
Extended Maturity [Member] | Commercial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 5 | 4 | 0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 533 | $ 675 | $ 0
Financing Receivable, Modifications, Number of Contracts | loans | 16 | 21 | 13
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ | $ 3,904 | $ 3,933 | $ 3,007
Extended Maturity [Member] | Noncommercial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 1 | 4 | 2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 306 | $ 190 | $ 273
Financing Receivable, Modifications, Number of Contracts | loans | 2 | 21 | 34
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ | $ 342 | $ 1,554 | $ 3,510
Interest Rate Below Market Reduction [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 90 | 92 | 110
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 6,648 | $ 8,459 | $ 7,983
Financing Receivable, Modifications, Number of Contracts | loans | 266 | 269 | 363
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ | $ 26,390 | $ 28,404 | $ 30,412
Interest Rate Below Market Reduction [Member] | Commercial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 24 | 24 | 32
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 2,634 | $ 2,998 | $ 3,392
Financing Receivable, Modifications, Number of Contracts | loans | 90 | 85 | 92
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ | $ 13,932 | $ 12,859 | $ 14,811
Interest Rate Below Market Reduction [Member] | Noncommercial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 66 | 68 | 78
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 4,014 | $ 5,461 | $ 4,591
Financing Receivable, Modifications, Number of Contracts | loans | 176 | 184 | 271
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ | $ 12,458 | $ 15,545 | $ 15,601
Discharge of Debt [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 91 | 64 | 91
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 9,267 | $ 3,994 | $ 3,100
Financing Receivable, Modifications, Number of Contracts | loans | 203 | 177 | 216
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ | $ 15,920 | $ 8,660 | $ 10,865
Discharge of Debt [Member] | Commercial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 20 | 8 | 26
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 5,028 | $ 825 | $ 708
Financing Receivable, Modifications, Number of Contracts | loans | 25 | 26 | 39
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ | $ 5,571 | $ 2,043 | $ 3,012
Discharge of Debt [Member] | Noncommercial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 71 | 56 | 65
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 4,239 | $ 3,169 | $ 2,392
Financing Receivable, Modifications, Number of Contracts | loans | 178 | 151 | 177
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ | $ 10,349 | $ 6,617 | $ 7,853

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