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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
--- | --- | ---
Jun. 30, 2017 USD ($) contract | Jun. 30, 2016 USD ($) contract | Jun. 30, 2017 USD ($) contract | Jun. 30, 2016 USD ($) contract
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 25 | 17 | 37 | 29
TROUBLED DEBT RESTRUCTURINGS: |  |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 4,110 | $ 2,169 | $ 5,407 | $ 3,558
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 4,124 | $ 2,169 | $ 5,421 | $ 3,600
Commercial and Industrial [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 6 | 4 | 8 | 7
TROUBLED DEBT RESTRUCTURINGS: |  |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 1,299 | $ 253 | $ 1,379 | $ 528
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 1,299 | $ 253 | $ 1,379 | $ 528
Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 2 | 4 | 6 | 6
TROUBLED DEBT RESTRUCTURINGS: |  |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 950 | $ 918 | $ 1,884 | $ 1,343
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 950 | $ 918 | $ 1,884 | $ 1,343
Small Business [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 4 | 2 | 8 | 2
TROUBLED DEBT RESTRUCTURINGS: |  |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 121 | $ 109 | $ 264 | $ 109
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 121 | $ 109 | $ 264 | $ 109
Residential Real Estate [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 5 | 3 | 5 | 5
TROUBLED DEBT RESTRUCTURINGS: |  |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 889 | $ 744 | $ 889 | $ 1,167
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 900 | $ 744 | $ 900 | $ 1,209
Consumer - Home Equity [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 8 | 3 | 10 | 4
TROUBLED DEBT RESTRUCTURINGS: |  |  |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 851 | $ 123 | $ 991 | $ 304
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 854 | $ 123 | $ 994 | $ 304
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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