Loans, Allowance for Loan Losses and Credit Quality (Details 9) (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, Subsequent Default, Number of Contracts		2	2	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		$ 392	$ 1,845	$ 392
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts			1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment			1,614
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts		1		1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		202		202
Small Business [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts			1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment			231
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts		1	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		$ 190	$ 0	$ 190