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Allowance For Loan Losses (Schedule Of Aging Analysis Of Accruing And Non-Accruing Loans) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Current | $ 3,593,213 | $ 3,559,926
Non-accrual | 11,490 | 14,551
Gross loans | 3,616,099 | 3,587,608
Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 1,629,519 | 1,621,073
Non-accrual | 3,393 | 4,275
Gross loans | 1,640,396 | 1,635,338
Home equity |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 147,441 | 152,083
Non-accrual | 531 | 138
Gross loans | 148,928 | 153,496
Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 306,375 | 284,140
Non-accrual | 1,182 | 1,676
Gross loans | 308,015 | 286,314
Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 1,451,773 | 1,445,896
Non-accrual | 6,384 | 8,461
Gross loans | 1,459,737 | 1,454,942
Consumer Loan |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 54,075 | 50,894
Non-accrual | 0 | 1
Gross loans | 54,263 | 51,190
DDA Overdrafts |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 4,030 | 5,840
Non-accrual | 0 | 0
Gross loans | 4,760 | 6,328
Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 9,155 | 11,451
Financial Asset, 30 to 59 Days Past Due [Member] | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 5,758 | 8,607
Financial Asset, 30 to 59 Days Past Due [Member] | Home equity |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 840 | 1,240
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 243 | 397
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 1,514 | 487
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Loan |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 156 | 253
Financial Asset, 30 to 59 Days Past Due [Member] | DDA Overdrafts |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 644 | 467
Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 1,974 | 1,423
Financial Asset, 60 to 89 Days Past Due [Member] | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 1,643 | 1,213
Financial Asset, 60 to 89 Days Past Due [Member] | Home equity |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 116 | 11
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 31 | 49
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 66 | 94
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Loan |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 32 | 41
Financial Asset, 60 to 89 Days Past Due [Member] | DDA Overdrafts |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 86 | 15
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 267 | 257
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 83 | 170
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Home equity |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 0 | 24
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 184 | 52
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 0 | 4
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Loan |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 0 | 1
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | DDA Overdrafts |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | $ 0 | $ 6

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