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Loans, Allowance for Loan Losses and Credit Quality (Modifications which occurred during the period & change in recorded investment) (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 USD ($) contract | Mar. 31, 2016 USD ($) contract
Financing Receivable, Modifications [Line Items] |  |
Financing Receivable, Modifications, Number of Contracts | contract | 12 | 12
TROUBLED DEBT RESTRUCTURINGS: |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 1,297 | $ 1,391
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 1,297 | $ 1,433
Commercial and Industrial [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Financing Receivable, Modifications, Number of Contracts | contract | 2 | 3
TROUBLED DEBT RESTRUCTURINGS: |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 80 | $ 277
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 80 | $ 277
Commercial Real Estate [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Financing Receivable, Modifications, Number of Contracts | contract | 4 | 2
TROUBLED DEBT RESTRUCTURINGS: |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 934 | $ 424
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 934 | $ 424
Small Business [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Financing Receivable, Modifications, Number of Contracts | contract | 4 |
TROUBLED DEBT RESTRUCTURINGS: |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 143 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 143 |
Residential Real Estate [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Financing Receivable, Modifications, Number of Contracts | contract |  | 2
TROUBLED DEBT RESTRUCTURINGS: |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment |  | $ 423
Financing Receivable, Modifications, Post-Modification Recorded Investment |  | $ 465
Consumer - Home Equity [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Financing Receivable, Modifications, Number of Contracts | contract | 2 | 1
TROUBLED DEBT RESTRUCTURINGS: |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 140 | $ 182
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 140 | $ 182
Consumer - Other [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Financing Receivable, Modifications, Number of Contracts | contract |  | 4
TROUBLED DEBT RESTRUCTURINGS: |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment |  | $ 85
Financing Receivable, Modifications, Post-Modification Recorded Investment |  | $ 85

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