Loans, Allowance for Loan Losses and Credit Quality (Details 4) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Summary of Nonaccrual Loans
TOTAL NONACCRUAL LOANS (1)	$ 31,006	[1]	$ 28,912	[1]
Commercial and Industrial [Member]
Summary of Nonaccrual Loans
TOTAL NONACCRUAL LOANS (1)	2,981		1,883
Commercial Real Estate [Member]
Summary of Nonaccrual Loans
TOTAL NONACCRUAL LOANS (1)	9,249		12,829
Commercial Construction [Member]
Summary of Nonaccrual Loans
TOTAL NONACCRUAL LOANS (1)			280
Small Business [Member]
Summary of Nonaccrual Loans
TOTAL NONACCRUAL LOANS (1)	604		542
Residential Real Estate [Member]
Summary of Nonaccrual Loans
TOTAL NONACCRUAL LOANS (1)	10,383		9,867
Consumer Home Equity [Member]
Summary of Nonaccrual Loans
TOTAL NONACCRUAL LOANS (1)	7,608		3,130
Consumer - Other [Member]
Summary of Nonaccrual Loans
TOTAL NONACCRUAL LOANS (1)	$ 181		$ 381

[1] Included in these amounts were $6.0 million and $9.2 million of nonaccruing TDRs at September 30, 2012 and December 31, 2011, respectively.