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Loans, Allowance for Loan Losses and Credit Quality (Post-Modification balance of TDRs Listed by Type of Modifications) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Post modification balance of Troubled Debt Restructuring |  |  |  |
Financing Receivable Modifications Post Modification Recorded Investment Adjusted Interest Rate | $ 0 | $ 0 | $ 150 | $ 0
Financing Receivable Modifications Post Modification Recorded Investment Combination Of Rate And Maturity | 0 | 237 | 0 | 237
COURT ORDERED CONCESSION | 0 | 74 | 75 | 695
EXTENDED MATURITY | 453 | 617 | 606 | 1,062
TOTAL | $ 453 | $ 928 | $ 831 | $ 1,994

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