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Loans, Allowance for Loan Losses and Credit Quality (Impaired Loans by Portfolio) (Details) - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015 | Jun. 30, 2015
--- | --- | --- | ---
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | $ 2,492 | $ 1,930 | $ 2,132
Related Allowance | 2,492 | 1,930 |
Impaired Financing Receivable, Recorded Investment, Total | 45,373 | 51,410 |
Impaired Financing Receivable, Unpaid Principal Balance | 48,917 | 54,822 |
WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 23,900 | 24,403 |
Unpaid Principal Balance | 25,983 | 26,276 |
Related Allowance | 0 | 0 |
WITH AN ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 21,473 | 27,007 |
Unpaid Principal Balance | 22,934 | 28,546 |
Commercial and Industrial [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 255 | 183 | 310
Commercial and Industrial [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 2,201 | 2,613 |
Unpaid Principal Balance | 2,572 | 3,002 |
Related Allowance | 0 | 0 |
Commercial and Industrial [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 2,430 | 2,534 |
Unpaid Principal Balance | 2,579 | 2,648 |
Commercial Real Estate [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 791 | 204 | 201
Commercial Real Estate [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 12,093 | 12,008 |
Unpaid Principal Balance | 13,272 | 13,128 |
Related Allowance | 0 | 0 |
Commercial Real Estate [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 6,682 | 10,978 |
Unpaid Principal Balance | 6,766 | 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 | 3 | 4 | 4
Small Business [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 684 | 527 |
Unpaid Principal Balance | 777 | 618 |
Related Allowance | 0 | 0 |
Small Business [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 393 | 494 |
Unpaid Principal Balance | 415 | 523 |
Residential Real Estate [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 1,188 | 1,278 | 1,337
Residential Real Estate [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 4,283 | 3,874 |
Unpaid Principal Balance | 4,601 | 4,033 |
Related Allowance | 0 | 0 |
Residential Real Estate [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 10,359 | 11,531 |
Unpaid Principal Balance | 11,338 | 12,652 |
Consumer - Home Equity [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 228 | 238 | 250
Consumer - Home Equity [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 4,504 | 4,893 |
Unpaid Principal Balance | 4,626 | 5,005 |
Related Allowance | 0 | 0 |
Consumer - Home Equity [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 1,260 | 1,096 |
Unpaid Principal Balance | 1,468 | 1,287 |
Consumer - Other [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 27 | 23 | $ 30
Consumer - Other [Member] | WITH NO RELATED ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 135 | 184 |
Unpaid Principal Balance | 135 | 185 |
Related Allowance | 0 | 0 |
Consumer - Other [Member] | WITH AN ALLOWANCE RECORDED: [Member] |  |  |
Impaired loans by loan portfolio |  |  |
Recorded Investment | 349 | 374 |
Unpaid Principal Balance | $ 368 | $ 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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