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Allowance For Loan Losses (Schedule Of Aging Analysis Of Accruing And Non-Accruing Loans) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | $ 3,559,926 | $ 3,106,150
Non-accrual | 14,551 | 10,297
Gross loans | 3,587,608 | 3,127,410
Residential real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 1,642,724 | 1,458,746
Non-accrual | 4,275 | 2,814
Gross loans | 1,656,989 | 1,468,278
Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 152,083 | 138,480
Non-accrual | 138 | 168
Gross loans | 153,496 | 139,499
Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 284,140 | 206,447
Non-accrual | 1,676 | 1,345
Gross loans | 286,314 | 208,484
Commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 1,424,245 | 1,269,520
Non-accrual | 8,461 | 5,970
Gross loans | 1,433,291 | 1,277,576
Consumer Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 50,894 | 29,108
Non-accrual | 1 | 0
Gross loans | 51,190 | 29,162
DDA Overdrafts |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 5,840 | 3,849
Non-accrual | 0 | 0
Gross loans | 6,328 | 4,411
Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 11,451 | 9,631
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 | 8,607 | 5,990
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 | 1,240 | 671
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 | 397 | 549
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 | 487 | 1,841
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 | 253 | 39
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 | 467 | 541
Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 1,423 | 1,070
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 | 1,213 | 709
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 | 11 | 88
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 | 49 | 1
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 | 94 | 245
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 | 41 | 13
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 | 15 | 14
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 | 257 | 262
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 | 170 | 19
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 | 24 | 92
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 | 52 | 142
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 | 4 | 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 | 1 | 2
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 | $ 6 | $ 7

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