Loans, Allowance for Loan Losses and Credit Quality (Impaired Loans by Portfolio) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Impaired loans by loan portfolio
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 2,699		$ 5,281
Related Allowance	2,699	3,774
Impaired Financing Receivable, Recorded Investment, Total	64,881	72,055
Impaired Financing Receivable, Unpaid Principal Balance	69,187	75,817
WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	28,800	29,685
Unpaid Principal Balance	30,884	32,186
Related Allowance
WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	36,081	42,370
Unpaid Principal Balance	38,303	43,631
Related Allowance	2,699	3,774
Commercial and Industrial [Member]
Impaired loans by loan portfolio
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	541		1,174
Commercial and Industrial [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	3,827	7,147
Unpaid Principal Balance	4,085	7,288
Related Allowance
Commercial and Industrial [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	3,765	2,001
Unpaid Principal Balance	4,341	2,045
Related Allowance		1,150
Commercial Real Estate [Member]
Impaired loans by loan portfolio
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	315		2,150
Commercial Real Estate [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	16,297	14,283
Unpaid Principal Balance	17,979	15,891
Related Allowance
Commercial Real Estate [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	17,468	25,233
Unpaid Principal Balance	17,781	25,377
Related Allowance		765
Commercial Construction [Member]
Impaired loans by loan portfolio
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Commercial Construction [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	311	100
Unpaid Principal Balance	311	408
Related Allowance
Small Business [Member]
Impaired loans by loan portfolio
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	10		111
Small Business [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	824	1,474
Unpaid Principal Balance	860	1,805
Related Allowance
Small Business [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	420	429
Unpaid Principal Balance	455	462
Related Allowance		109
Residential Real Estate [Member]
Impaired loans by loan portfolio
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1,521		1,651
Residential Real Estate [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	2,794	1,972
Unpaid Principal Balance	2,852	2,026
Related Allowance
Residential Real Estate [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	12,709	13,228
Unpaid Principal Balance	13,909	14,197
Related Allowance		1,564
Consumer - Home Equity [Member]
Impaired loans by loan portfolio
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	269		112
Consumer - Home Equity [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	4,387	4,263
Unpaid Principal Balance	4,434	4,322
Related Allowance
Consumer - Home Equity [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	1,105	627
Unpaid Principal Balance	1,201	694
Related Allowance		116
Consumer - Other [Member]
Impaired loans by loan portfolio
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	43		83
Consumer - Other [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	360	446
Unpaid Principal Balance	363	446
Related Allowance
Consumer - Other [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	614	852
Unpaid Principal Balance	616	856
Related Allowance		$ 70