Loans, Allowance for Loan Losses and Credit Quality (Details 7) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
TROUBLED DEBT RESTRUCTURINGS:
Number of Contracts	12		24
Pre-Modification Outstanding Recorded Investment	$ 1,600		$ 4,176
Post-Modification Outstanding Recorded Investment(1)	1,626	[1]	4,176	[1]
Commercial and Industrial [Member]
TROUBLED DEBT RESTRUCTURINGS:
Number of Contracts			6
Pre-Modification Outstanding Recorded Investment			319
Post-Modification Outstanding Recorded Investment(1)			319	[1]
Commercial Real Estate [Member]
TROUBLED DEBT RESTRUCTURINGS:
Number of Contracts			5
Pre-Modification Outstanding Recorded Investment			3,283
Post-Modification Outstanding Recorded Investment(1)			3,283	[1]
Small Business [Member]
TROUBLED DEBT RESTRUCTURINGS:
Number of Contracts	4		9
Pre-Modification Outstanding Recorded Investment	268		371
Post-Modification Outstanding Recorded Investment(1)	268	[1]	371	[1]
Residential Real Estate [Member]
TROUBLED DEBT RESTRUCTURINGS:
Number of Contracts	4		1
Pre-Modification Outstanding Recorded Investment	1,156		117
Post-Modification Outstanding Recorded Investment(1)	1,182	[1]	117	[1]
Consumer - Home Equity [Member]
TROUBLED DEBT RESTRUCTURINGS:
Number of Contracts	2
Pre-Modification Outstanding Recorded Investment	165
Post-Modification Outstanding Recorded Investment(1)	165	[1]
Consumer - Other [Member]
TROUBLED DEBT RESTRUCTURINGS:
Number of Contracts	2		3
Pre-Modification Outstanding Recorded Investment	11		86
Post-Modification Outstanding Recorded Investment(1)	$ 11	[1]	$ 86	[1]

[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.