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