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Allowance For Loan Losses (Schedule Of Aging Analysis Of Accruing And Non-Accruing Loans) (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | $ 3,087,670 | $ 3,024,215
Purchased-Credit Impaired | 147 | 0
Non-accrual | 10,673 | 13,701
Gross loans | 3,105,912 | 3,046,226
Residential real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 1,458,091 | 1,441,086
Purchased-Credit Impaired | 0 | 0
Non-accrual | 2,556 | 4,302
Gross loans | 1,465,942 | 1,451,462
Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 138,737 | 141,192
Purchased-Credit Impaired | 0 | 0
Non-accrual | 92 | 100
Gross loans | 139,702 | 141,965
Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 203,093 | 183,615
Purchased-Credit Impaired | 0 | 0
Non-accrual | 1,325 | 1,958
Gross loans | 204,722 | 185,667
Commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 1,253,686 | 1,221,344
Purchased-Credit Impaired | 147 | 0
Non-accrual | 6,700 | 7,341
Gross loans | 1,260,906 | 1,229,516
Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 30,298 | 32,506
Purchased-Credit Impaired | 0 | 0
Non-accrual | 0 | 0
Gross loans | 30,323 | 32,545
DDA overdrafts |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 3,765 | 4,472
Purchased-Credit Impaired | 0 | 0
Non-accrual | 0 | 0
Gross loans | 4,317 | 5,071
Commercial Industrial Loans And Commercial Real Estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Gross loans | 1,465,628 | 1,415,183
30-59 days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 6,590 | 7,067
30-59 days | Residential real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 4,684 | 5,364
30-59 days | Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 797 | 423
30-59 days | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 304 | 94
30-59 days | Commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 240 | 553
30-59 days | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 23 | 38
30-59 days | DDA overdrafts |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 542 | 595
60-89 days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 810 | 861
60-89 days | Residential real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 611 | 637
60-89 days | Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 57 | 219
60-89 days | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 0 | 0
60-89 days | Commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 133 | 0
60-89 days | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 2 | 1
60-89 days | DDA overdrafts |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 7 | 4
Over 90 days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 22 | 382
Over 90 days | Residential real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 0 | 73
Over 90 days | Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 19 | 31
Over 90 days | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 0 | 0
Over 90 days | Commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 0 | 278
Over 90 days | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 0 | 0
Over 90 days | DDA overdrafts |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | $ 3 | $ 0

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