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Allowance For Loan Losses (Schedule Of Aging Analysis Of Accruing And Non-Accruing Loans) (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | $ 3,536,203 | $ 3,559,926
Non-accrual | 12,113 | 14,551
Gross loans | 3,559,322 | 3,587,608
Residential real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 1,614,413 | 1,621,073
Non-accrual | 3,263 | 4,275
Gross loans | 1,625,647 | 1,635,338
Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 151,489 | 152,083
Non-accrual | 41 | 138
Gross loans | 152,251 | 153,496
Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 287,700 | 284,140
Non-accrual | 1,526 | 1,676
Gross loans | 289,327 | 286,314
Commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 1,427,494 | 1,445,896
Non-accrual | 7,282 | 8,461
Gross loans | 1,436,190 | 1,454,942
Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 52,218 | 50,894
Non-accrual | 1 | 1
Gross loans | 52,483 | 51,190
DDA overdrafts |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 2,889 | 5,840
Non-accrual | 0 | 0
Gross loans | 3,424 | 6,328
30-59 days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 9,936 | 11,451
30-59 days | Residential real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 7,245 | 8,607
30-59 days | Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 551 | 1,240
30-59 days | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 101 | 397
30-59 days | Commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 1,377 | 487
30-59 days | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 129 | 253
30-59 days | DDA overdrafts |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 533 | 467
60-89 days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 964 | 1,423
60-89 days | Residential real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 713 | 1,213
60-89 days | Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 167 | 11
60-89 days | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 0 | 49
60-89 days | Commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 0 | 94
60-89 days | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 82 | 41
60-89 days | DDA overdrafts |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 2 | 15
Over 90 days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 106 | 257
Over 90 days | Residential real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 13 | 170
Over 90 days | Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 3 | 24
Over 90 days | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 0 | 52
Over 90 days | Commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 37 | 4
Over 90 days | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 53 | 1
Over 90 days | DDA overdrafts |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | $ 0 | $ 6

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