Loans, Allowance for Loan Losses and Credit Quality (Details 9) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 contract	Mar. 31, 2012 contract
TROUBLED DEBT RESTRUCTURINGS THAT SUBSEQUENTLY DEFAULTED:
Number of Contracts	4	3
Recorded Investment	$ 695	$ 259
Commercial and Industrial [Member]
TROUBLED DEBT RESTRUCTURINGS THAT SUBSEQUENTLY DEFAULTED:
Number of Contracts	2	1
Recorded Investment	201	250
Commercial Real Estate [Member]
TROUBLED DEBT RESTRUCTURINGS THAT SUBSEQUENTLY DEFAULTED:
Number of Contracts	2
Recorded Investment	494
Small Business [Member]
TROUBLED DEBT RESTRUCTURINGS THAT SUBSEQUENTLY DEFAULTED:
Number of Contracts		1
Recorded Investment		4
Consumer - Other [Member]
TROUBLED DEBT RESTRUCTURINGS THAT SUBSEQUENTLY DEFAULTED:
Number of Contracts		1
Recorded Investment		$ 5