Loans, Allowance for Loan Losses and Credit Quality (Details 9) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012 contract	Sep. 30, 2011 contract	Sep. 30, 2012 contract	Sep. 30, 2011 contract
TROUBLED DEBT RESTRUCTURINGS THAT SUBSEQUENTLY DEFAULTED:
Number of Contracts	2	5	2	5
Recorded Investment	$ 392	$ 455	$ 392	$ 455
Commercial and Industrial [Member]
TROUBLED DEBT RESTRUCTURINGS THAT SUBSEQUENTLY DEFAULTED:
Number of Contracts
Recorded Investment
Commercial Real Estate [Member]
TROUBLED DEBT RESTRUCTURINGS THAT SUBSEQUENTLY DEFAULTED:
Number of Contracts	1		1
Recorded Investment	202		202
Small Business [Member]
TROUBLED DEBT RESTRUCTURINGS THAT SUBSEQUENTLY DEFAULTED:
Number of Contracts		2		2
Recorded Investment		66		66
Residential Real Estate [Member]
TROUBLED DEBT RESTRUCTURINGS THAT SUBSEQUENTLY DEFAULTED:
Number of Contracts	1	1	1	1
Recorded Investment	190	378	190	378
Consumer - Home Equity [Member]
TROUBLED DEBT RESTRUCTURINGS THAT SUBSEQUENTLY DEFAULTED:
Number of Contracts
Recorded Investment
Consumer - Other [Member]
TROUBLED DEBT RESTRUCTURINGS THAT SUBSEQUENTLY DEFAULTED:
Number of Contracts		2		2
Recorded Investment		$ 11		$ 11