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Loans, Allowance for Loan Losses and Credit Quality (TDRs that have subsequently defaulted) (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 USD ($) contract | Sep. 30, 2015 USD ($) contract | Sep. 30, 2016 USD ($) contract | Sep. 30, 2015 USD ($) contract
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | contract | 1 | 0 | 1 | 5
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 141,000 | $ 0 | $ 141,000 | $ 1,219,000
Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | contract | 0 | 0 | 0 | 2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 0 | $ 0 | $ 0 | $ 880,000
Commercial and Industrial [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | contract | 0 | 0 | 0 | 3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 0 | $ 0 | $ 0 | $ 339,000
Residential Real Estate [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | contract | 0 | 0 |  |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 0 | $ 0 |  |
Consumer - Home Equity [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | contract | 1 | 0 | 1 | 0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 141,000 | $ 0 | $ 141,000 | $ 0

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- Definition Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953682-111524 + Details
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- Definition Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953682-111524 + Details
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