Loans, Allowance for Loan Losses and Credit Quality (Details 7) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013 contract		Sep. 30, 2012 contract		Sep. 30, 2013 contract	Sep. 30, 2012 contract
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	9		33		29	95
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 1,173		$ 3,337		$ 4,905	$ 11,365
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,173	[1]	3,343	[1]	4,931	11,371
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	1		4		3	15
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	37		329		319	1,602
Financing Receivable, Modifications, Post-Modification Recorded Investment	37	[1]	329	[1]	319	1,602
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	2		5		4	13
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	463		1,624		1,526	6,274
Financing Receivable, Modifications, Post-Modification Recorded Investment	463	[1]	1,624	[1]	1,526	6,274
Small Business [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	4		8		9	16
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	261		327		543	724
Financing Receivable, Modifications, Post-Modification Recorded Investment	261	[1]	327	[1]	543	724
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	1		5		7	9
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	228		889		2,128	1,539
Financing Receivable, Modifications, Post-Modification Recorded Investment	228	[1]	893	[1]	2,154	1,543
Consumer - Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	1		3		4	12
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	184		111		378	767
Financing Receivable, Modifications, Post-Modification Recorded Investment	184	[1]	113	[1]	378	769
Consumer - Other [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	0		8		2	30
TROUBLED DEBT RESTRUCTURINGS:
Financing Receivable, Modifications, Pre-Modification Recorded Investment	0		57		11	459
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	[1]	$ 57	[1]	$ 11	$ 459

[1] The post-modification balances represent the balance of the loan on the date of modifications. These amounts may show an increase when modifications include a capitalization of interest.