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	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Dec. 31, 2015
Post modification balance of Troubled Debt Restructuring
EXTENDED MATURITY	$ 256	$ 855	$ 2,638	$ 2,204
Financing Receivable Modifications Post Modification Recorded Investment Adjusted Interest Rate	0	0	92	0
COMBINATION RATE & MATURITY	730	246	990	2,769
COURT ORDERED CONCESSION	387	36	1,253	66
TOTAL	$ 1,373	$ 1,137	$ 4,973	$ 5,039