Loans, Allowance for Loan Losses and Credit Quality (Modifications which occurred during the period & change in recorded investment) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) contract	Sep. 30, 2014 USD ($) contract	Sep. 30, 2015 USD ($) contract	Sep. 30, 2014 USD ($) contract
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	7	11	32	44
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 1,110	$ 2,499	$ 5,012	$ 7,204
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1,137	$ 2,501	$ 5,039	$ 7,235
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	1	3	10	12
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 100	$ 193	$ 1,153	$ 744
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 100	$ 193	$ 1,153	$ 744
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	1	5	6	13
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 653	$ 2,095	$ 2,963	$ 4,225
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 653	$ 2,095	$ 2,963	$ 4,225
Small Business [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	2	0	7	1
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 103	$ 0	$ 269	$ 58
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 103	$ 0	$ 269	$ 58
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	2	1	5	8
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 218	$ 156	$ 376	$ 1,388
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 245	$ 158	$ 403	$ 1,419
Consumer - Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	1	2	4	9
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 36	$ 55	$ 251	$ 781
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 36	$ 55	$ 251	$ 781
Consumer - Other [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract		0		1
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 0		$ 8
Financing Receivable, Modifications, Post-Modification Recorded Investment		$ 0		$ 8