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Loans, Allowance for Loan Losses and Credit Quality (Int Inc. Recognized on Impaired Loans by Portfolio) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | $ 45,858 | $ 59,053 | $ 46,216 | $ 59,834
Interest Income Recognized | 392 | 764 | 785 | 1,582
WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |  |
Interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 24,221 | 27,252 | 24,473 | 27,843
Interest Income Recognized | 223 | 373 | 447 | 764
WITH AN ALLOWANCE RECORDED: [Member] |  |  |  |
Interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 21,637 | 31,801 | 21,743 | 31,991
Interest Income Recognized | 169 | 391 | 338 | 818
Commercial and Industrial [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |  |
Interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 2,349 | 2,842 | 2,415 | 2,927
Interest Income Recognized | 15 | 40 | 30 | 81
Commercial and Industrial [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |  |
Interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 2,458 | 2,712 | 2,487 | 2,749
Interest Income Recognized | 6 | 31 | 12 | 62
Commercial Real Estate [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |  |
Interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 12,205 | 14,467 | 12,327 | 15,044
Interest Income Recognized | 103 | 227 | 207 | 471
Commercial Real Estate [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |  |
Interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 6,716 | 15,231 | 6,744 | 15,292
Interest Income Recognized | 51 | 204 | 102 | 406
Construction Loans [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |  |
Interest income recognized on impaired loans |  |  |  |
Average Recorded Investment |  | 310 |  | 311
Interest Income Recognized |  | 3 |  | 7
Small Business [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |  |
Interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 677 | 459 | 691 | 471
Interest Income Recognized | 5 | 6 | 11 | 13
Small Business [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |  |
Interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 401 | 442 | 410 | 453
Interest Income Recognized | 6 | 7 | 13 | 15
Residential Real Estate [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |  |
Interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 4,315 | 3,385 | 4,331 | 3,403
Interest Income Recognized | 51 | 40 | 101 | 79
Residential Real Estate [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |  |
Interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 10,394 | 11,608 | 10,424 | 11,662
Interest Income Recognized | 91 | 128 | 184 | 295
Consumer - Home Equity [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |  |
Interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 4,537 | 4,585 | 4,567 | 4,613
Interest Income Recognized | 46 | 51 | 93 | 102
Consumer - Home Equity [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |  |
Interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 1,311 | 1,336 | 1,316 | 1,345
Interest Income Recognized | 13 | 16 | 23 | 31
Consumer - Other [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |  |
Interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 138 | 1,204 | 142 | 1,074
Interest Income Recognized | 3 | 6 | 5 | 11
Consumer - Other [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |  |
Interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 357 | 472 | 362 | 490
Interest Income Recognized | $ 2 | $ 5 | $ 4 | $ 9

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