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Allowance For Loan Losses (Schedule Of Aging Analysis Of Accruing And Non-Accruing Loans) (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Current | $ 3,557,167 | $ 3,559,926
Non-accrual | 15,197 | 14,551
Gross loans | 3,582,571 | 3,587,608
Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 1,633,987 | 1,621,073
Non-accrual | 2,570 | 4,275
Gross loans | 1,643,416 | 1,635,338
Home equity |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 149,544 | 152,083
Non-accrual | 469 | 138
Gross loans | 150,808 | 153,496
Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 294,341 | 284,140
Non-accrual | 2,059 | 1,676
Gross loans | 296,927 | 286,314
Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 1,420,608 | 1,445,896
Non-accrual | 10,099 | 8,461
Gross loans | 1,431,983 | 1,454,942
Consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 54,675 | 50,894
Non-accrual | 0 | 1
Gross loans | 54,799 | 51,190
DDA overdrafts |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 4,012 | 5,840
Non-accrual | 0 | 0
Gross loans | 4,638 | 6,328
30-59 days |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 8,994 | 11,451
30-59 days | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 5,817 | 8,607
30-59 days | Home equity |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 749 | 1,240
30-59 days | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 415 | 397
30-59 days | Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 1,276 | 487
30-59 days | Consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 124 | 253
30-59 days | DDA overdrafts |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 613 | 467
60-89 days |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 761 | 1,423
60-89 days | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 692 | 1,213
60-89 days | Home equity |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 6 | 11
60-89 days | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 50 | 49
60-89 days | Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 0 | 94
60-89 days | Consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 0 | 41
60-89 days | DDA overdrafts |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 13 | 15
Over 90 days |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 452 | 257
Over 90 days | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 350 | 170
Over 90 days | Home equity |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 40 | 24
Over 90 days | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 62 | 52
Over 90 days | Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 0 | 4
Over 90 days | Consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | 0 | 1
Over 90 days | DDA overdrafts |  |
Financing Receivable, Past Due [Line Items] |  |
Financing receivable, recorded investment, past due | $ 0 | $ 6

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