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Loans and Allowance for Loan and Lease Losses (Troubled Debt Restructurings) (Details) | 12 Months Ended
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Dec. 31, 2019 USD ($) Loan contract | Dec. 31, 2018 USD ($) Loan contract | Dec. 31, 2017 USD ($) contract
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 3,282,000 | $ 7,741,000 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | 3,181,000 | 7,990,000 |
Financing Receivable, Modifications, Recorded Investment | $ 2,238,000 | $ 7,020,000 |
Financing Receivable, Modifications, Number of Contracts | Loan | 0 | 0 |
Entity Loan Modification Program [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 43,000 | $ 270,000 | $ 7,322,000
Financing Receivable, Modifications, Post-Modification Recorded Investment | 43,000 | 270,000 | 7,610,000
Financing Receivable, Modifications, Recorded Investment | $ 43,000 | $ 266,000 | $ 7,574,000
Financing Receivable, Modifications, Number of Contracts | contract | 2 | 1 | 10
Home Equity [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment |  | $ 14,000 |
Financing Receivable, Modifications, Post-Modification Recorded Investment |  | 14,000 |
Financing Receivable, Modifications, Recorded Investment |  | 1,000 |
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Entity Loan Modification Program [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 3,000 |  | $ 4,110,000
Financing Receivable, Modifications, Post-Modification Recorded Investment | 3,000 |  | 4,460,000
Financing Receivable, Modifications, Recorded Investment | $ 3,000 |  | $ 4,434,000
Financing Receivable, Modifications, Number of Contracts | contract | 1 |  | 1
Commercial Portfolio [Member] | Commercial and Industrial [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 3,000 | 4,110,000 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | 3,000 | 4,460,000 |
Financing Receivable, Modifications, Recorded Investment | 3,000 | 4,302,000 |
Commercial Portfolio [Member] | Commercial Real Estate [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 2,562,000 | 2,940,000 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | 2,463,000 | 2,841,000 |
Financing Receivable, Modifications, Recorded Investment | 1,705,000 | 2,201,000 |
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Entity Loan Modification Program [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment |  | 270,000 | $ 3,212,000
Financing Receivable, Modifications, Post-Modification Recorded Investment |  | 270,000 | 3,150,000
Financing Receivable, Modifications, Recorded Investment |  | $ 266,000 | $ 3,140,000
Financing Receivable, Modifications, Number of Contracts | contract |  | 1 | 9
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 40,000 |  |
Financing Receivable, Modifications, Post-Modification Recorded Investment | 40,000 |  |
Financing Receivable, Modifications, Recorded Investment | 40,000 |  |
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member] | Entity Loan Modification Program [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 40,000 |  |
Financing Receivable, Modifications, Post-Modification Recorded Investment | 40,000 |  |
Financing Receivable, Modifications, Recorded Investment | $ 40,000 |  |
Financing Receivable, Modifications, Number of Contracts | contract | 1 |  |
Residential Portfolio [Member] | Residential Mortgage [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 677,000 | $ 677,000 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | 675,000 | 675,000 |
Financing Receivable, Modifications, Recorded Investment | $ 490,000 | $ 516,000 |

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