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Allowance For Loan Losses (Schedule Of Aging Analysis Of Accruing And Non-Accruing Loans) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | $ 3,024,215 | $ 2,836,419
Impaired Financing Receivable, Recorded Investment, Past Due | 0 | 506
Non-accrual | 13,701 | 16,948
Gross loans | 3,046,226 | 2,862,534
Residential real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 1,441,086 | 1,373,604
Impaired Financing Receivable, Recorded Investment, Past Due | 0 | 0
Non-accrual | 4,302 | 2,918
Gross loans | 1,451,462 | 1,383,133
Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 141,192 | 146,493
Impaired Financing Receivable, Recorded Investment, Past Due | 0 | 0
Non-accrual | 100 | 136
Gross loans | 141,965 | 147,036
Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 183,615 | 162,435
Impaired Financing Receivable, Recorded Investment, Past Due | 0 | 0
Non-accrual | 1,958 | 2,745
Gross loans | 185,667 | 165,340
Commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 1,221,344 | 1,114,953
Impaired Financing Receivable, Recorded Investment, Past Due | 0 | 506
Non-accrual | 7,341 | 11,149
Gross loans | 1,229,516 | 1,127,581
Consumer Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 32,506 | 35,886
Impaired Financing Receivable, Recorded Investment, Past Due | 0 | 0
Non-accrual | 0 | 0
Gross loans | 32,545 | 36,083
DDA Overdrafts |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 4,472 | 3,048
Impaired Financing Receivable, Recorded Investment, Past Due | 0 | 0
Non-accrual | 0 | 0
Gross loans | 5,071 | 3,361
Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 7,067 | 6,946
Financing Receivables, 30 to 59 Days Past Due [Member] | Residential real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 5,364 | 5,261
Financing Receivables, 30 to 59 Days Past Due [Member] | Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 423 | 318
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 94 | 141
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 553 | 762
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 38 | 154
Financing Receivables, 30 to 59 Days Past Due [Member] | DDA Overdrafts |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 595 | 310
Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 861 | 1,220
Financing Receivables, 60 to 89 Days Past Due [Member] | Residential real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 637 | 932
Financing Receivables, 60 to 89 Days Past Due [Member] | Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 219 | 65
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 0 | 0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 0 | 211
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 1 | 9
Financing Receivables, 60 to 89 Days Past Due [Member] | DDA Overdrafts |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 4 | 3
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 382 | 495
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Residential real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 73 | 418
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 31 | 24
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 0 | 19
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 278 | 0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 0 | 34
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | DDA Overdrafts |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | $ 0 | $ 0

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