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Loans, Allowance for Loan Losses and Credit Quality (Textual) (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 0 | $ 205,000 | $ 0 | $ 205,000 |
Unamortized Loan Commitment and Origination fees | 6,900,000 |  | $ 6,900,000 |  | $ 6,100,000
Document Period End Date |  |  | Sep. 30, 2018 |  |
Significant Advanced Considered For Risk Rating Change |  |  | $ 50,000 |  |
Days to be termed as non accrual loans |  |  | 90 days |  |
Tdrs Recorded Investment On Nonaccrual Status | 3,370,000 |  | $ 3,370,000 |  | 6,067,000
Unamortized Discounts or Premiums | $ 8,600,000 |  | $ 8,600,000 |  | $ 9,400,000

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- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. + References No definition available. + Details
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- Definition Days to be termed as non accrual loans. + References No definition available. + Details
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- Definition Troubled Debt Restructurings recorded investment that are on nonaccrual status as of the balance sheet date. + References No definition available. + Details
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- Definition Premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. + References No definition available. + Details
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- Definition Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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