Loans, Allowance for Loan Losses and Credit Quality (Impaired Loans by Portfolio) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Impaired loans by loan portfolio
Related Allowance	$ 2,942	$ 3,774
Impaired Financing Receivable, Recorded Investment, Total	70,503	72,055
Impaired Financing Receivable, Unpaid Principal Balance	75,810	75,817
WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	35,638	29,685
Unpaid Principal Balance	38,617	32,186
Related Allowance
WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	34,865	42,370
Unpaid Principal Balance	37,193	43,631
Related Allowance	2,942	3,774
Commercial and Industrial [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	5,064	7,147
Unpaid Principal Balance	5,615	7,288
Related Allowance
Commercial and Industrial [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	3,490	2,001
Unpaid Principal Balance	3,545	2,045
Related Allowance	647	1,150
Commercial Real Estate [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	21,227	14,283
Unpaid Principal Balance	22,908	15,891
Related Allowance
Commercial Real Estate [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	15,849	25,233
Unpaid Principal Balance	16,889	25,377
Related Allowance	369	765
Commercial Construction [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	100	100
Unpaid Principal Balance	408	408
Related Allowance
Small Business [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	1,401	1,474
Unpaid Principal Balance	1,603	1,805
Related Allowance
Small Business [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	451	429
Unpaid Principal Balance	566	462
Related Allowance	109	109
Residential Real Estate [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	2,930	1,972
Unpaid Principal Balance	3,095	2,026
Related Allowance
Residential Real Estate [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	13,672	13,228
Unpaid Principal Balance	14,717	14,197
Related Allowance	1,641	1,564
Consumer - Home Equity [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	4,514	4,263
Unpaid Principal Balance	4,580	4,322
Related Allowance
Consumer - Home Equity [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	619	627
Unpaid Principal Balance	690	694
Related Allowance	114	116
Consumer - Other [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	402	446
Unpaid Principal Balance	408	446
Related Allowance
Consumer - Other [Member] | WITH AN ALLOWANCE RECORDED: [Member]
Impaired loans by loan portfolio
Recorded Investment	784	852
Unpaid Principal Balance	786	856
Related Allowance	$ 62	$ 70