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, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Post modification balance of Troubled Debt Restructuring
EXTENDED MATURITY	$ 486	$ 256	$ 4,565	$ 2,638
Financing Receivable Modifications Post Modification Recorded Investment Adjusted Interest Rate	0	0	0	92
COMBINATION RATE & MATURITY	196	730	196	990
COURT ORDERED CONCESSION	133	387	1,475	1,253
TOTAL	$ 815	$ 1,373	$ 6,236	$ 4,973