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
	Mar. 31, 2019	Mar. 31, 2018
Post modification balance of Troubled Debt Restructuring
Financing Receivable Modifications Post Modification Recorded Investment Adjusted Interest Rate	$ 150	$ 0
COURT ORDERED CONCESSION	75	242
EXTENDED MATURITY	0	445
TOTAL	$ 225	$ 687