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		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Post modification balance of Troubled Debt Restructuring
EXTENDED MATURITY	$ 0	$ 2,872	$ 445	$ 4,079
COURT ORDERED CONCESSION	379	1,252	621	1,342
TOTAL	$ 379	$ 4,124	$ 1,066	$ 5,421