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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 | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2016 USD ($) contract | Jun. 30, 2015 USD ($) contract | Jun. 30, 2016 USD ($) contract | Dec. 31, 2015 USD ($) contract
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 17 | 15 | 29 | 26
TROUBLED DEBT RESTRUCTURINGS: |  |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 2,169 | $ 3,415 | $ 3,558 | $ 4,201
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 2,169 | $ 3,415 | $ 3,600 | $ 4,201
Commercial and Industrial [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 4 | 7 | 7 | 10
TROUBLED DEBT RESTRUCTURINGS: |  |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 253 | $ 1,197 | $ 528 | $ 1,353
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 253 | $ 1,197 | $ 528 | $ 1,353
Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 4 | 4 | 6 | 5
TROUBLED DEBT RESTRUCTURINGS: |  |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 918 | $ 2,071 | $ 1,343 | $ 2,310
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 918 | $ 2,071 | $ 1,343 | $ 2,310
Small Business [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 2 | 3 | 2 | 5
TROUBLED DEBT RESTRUCTURINGS: |  |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 109 | $ 116 | $ 109 | $ 166
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 109 | $ 116 | $ 109 | $ 166
Residential Real Estate [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 3 | 0 | 5 | 3
TROUBLED DEBT RESTRUCTURINGS: |  |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 744 | $ 0 | $ 1,167 | $ 157
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 744 | $ 0 | $ 1,209 | $ 157
Consumer - Home Equity [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 3 | 1 | 4 | 3
TROUBLED DEBT RESTRUCTURINGS: |  |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 123 | $ 31 | $ 304 | $ 215
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 123 | $ 31 | $ 304 | $ 215
Consumer - Other [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 1 |  | 5 |
TROUBLED DEBT RESTRUCTURINGS: |  |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 22 |  | $ 107 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 22 |  | $ 107 |

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