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Loans and Allowance for Loan and Lease Losses (Average Recorded Investment Of Impaired Loans And Related Interest Income By Loan Portfolio Class) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Home Equity [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | $ 90 | $ 66 | $ 101 | $ 53
Impaired Loans with No Allowance: Interest Income Recognized |  |  | 2 |
Impaired Loans with Allowance: Average Recorded Investment |  | 17 |  | 19
Impaired Financing Receivable, Average Recorded Investment, Total | 90 | 83 | 101 | 72
Impaired Financing Receivable, Interest Income Recognized, Total |  |  | 2 |
Commercial Portfolio [Member] | Commercial and Industrial [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 36 | 11 | 18 | 14
Impaired Loans with Allowance: Average Recorded Investment |  | 59 |  | 61
Impaired Financing Receivable, Average Recorded Investment, Total | 36 | 70 | 18 | 75
Commercial Portfolio [Member] | Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 644 | 960 | 524 | 1,001
Impaired Loans with No Allowance: Interest Income Recognized |  |  | 279 |
Impaired Loans with Allowance: Average Recorded Investment | 2,792 | 2,201 | 2,660 | 1,851
Impaired Financing Receivable, Average Recorded Investment, Total | 4,080 | 4,104 | 3,922 | 3,786
Impaired Financing Receivable, Interest Income Recognized, Total | 110 |  | 389 |
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 644 | 943 | 738 | 934
Impaired Loans with No Allowance: Interest Income Recognized | 110 |  | 110 |
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 473 |  | 313 |
Impaired Loans with Allowance: Average Recorded Investment | 240 |  | 144 |
Impaired Financing Receivable, Average Recorded Investment, Total | 713 |  | 457 |
Residential Portfolio [Member] | Residential Mortgage [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 860 | 831 | 843 | 777
Impaired Loans with No Allowance: Interest Income Recognized | 7 | 7 | 18 | 9
Impaired Loans with Allowance: Average Recorded Investment | 66 |  | 40 |
Impaired Financing Receivable, Average Recorded Investment, Total | 1,252 | 1,208 | 1,233 | 1,152
Impaired Financing Receivable, Interest Income Recognized, Total | 9 | 7 | 18 | 13
Residential Portfolio [Member] | Residential Mortgage [Member] | Receivables Acquired with Deteriorated Credit Quality [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 326 | $ 377 | $ 350 | 375
Impaired Loans with No Allowance: Interest Income Recognized | $ 2 |  |  | $ 4

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