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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, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Post modification balance of Troubled Debt Restructuring |  |  |  |
EXTENDED MATURITY | $ 617 | $ 486 | $ 1,062 | $ 4,565
Financing Receivable Modifications Post Modification Recorded Investment Combination Of Rate And Maturity | 237 | 196 | 237 | 196
COURT ORDERED CONCESSION | 74 | 133 | 695 | 1,475
TOTAL | $ 928 | $ 815 | $ 1,994 | $ 6,236

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