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Loans, Allowance for Loan Losses and Credit Quality (Impaired Loans by Portfolio) (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015 | Sep. 30, 2015
--- | --- | --- | ---
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | $ 1,893 | $ 1,930 | $ 2,090
Related Allowance | 1,893 | 1,930 |
Impaired Financing Receivable, Recorded Investment, Total | 44,029 | 51,410 |
Impaired Financing Receivable, Unpaid Principal Balance | 47,643 | 54,822 |
WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 23,470 | 24,403 |
Unpaid Principal Balance | 25,311 | 26,276 |
Related Allowance | 0 | 0 |
WITH AN ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 20,559 | 27,007 |
Unpaid Principal Balance | 22,332 | 28,546 |
Commercial and Industrial [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 134 | 183 | 252
Commercial and Industrial [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 2,382 | 2,613 |
Unpaid Principal Balance | 2,750 | 3,002 |
Related Allowance | 0 | 0 |
Commercial and Industrial [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 2,086 | 2,534 |
Unpaid Principal Balance | 2,252 | 2,648 |
Commercial Real Estate [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 355 | 204 | 225
Commercial Real Estate [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 11,481 | 12,008 |
Unpaid Principal Balance | 12,567 | 13,128 |
Related Allowance | 0 | 0 |
Commercial Real Estate [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 6,596 | 10,978 |
Unpaid Principal Balance | 7,023 | 11,047 |
Construction Loans [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 |  | 0
Construction Loans [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment |  | 304 |
Unpaid Principal Balance |  | 305 |
Related Allowance |  | 0 |
Small Business [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 2 | 4 | 28
Small Business [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 612 | 527 |
Unpaid Principal Balance | 703 | 618 |
Related Allowance | 0 | 0 |
Small Business [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 357 | 494 |
Unpaid Principal Balance | 369 | 523 |
Residential Real Estate [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 1,156 | 1,278 | 1,313
Residential Real Estate [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 4,226 | 3,874 |
Unpaid Principal Balance | 4,399 | 4,033 |
Related Allowance | 0 | 0 |
Residential Real Estate [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 9,967 | 11,531 |
Unpaid Principal Balance | 10,968 | 12,652 |
Consumer - Home Equity [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 223 | 238 | 245
Consumer - Home Equity [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 4,611 | 4,893 |
Unpaid Principal Balance | 4,733 | 5,005 |
Related Allowance | 0 | 0 |
Consumer - Home Equity [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 1,293 | 1,096 |
Unpaid Principal Balance | 1,459 | 1,287 |
Consumer - Other [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 23 | 23 | $ 27
Consumer - Other [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 158 | 184 |
Unpaid Principal Balance | 159 | 185 |
Related Allowance | 0 | 0 |
Consumer - Other [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 260 | 374 |
Unpaid Principal Balance | $ 261 | $ 389 |

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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
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