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Allowance For Loan Losses (Schedule Of Non-Commercial Loans By Payment Performance) (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Total | $ 3,146,697 | $ 3,127,410
Residential real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 1,485,823 | 1,468,278
Residential real estate | Performing [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 1,482,771 | 1,465,445
Residential real estate | Non-Performing |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 3,052 | 2,833
Home equity |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 143,540 | 139,499
Home equity | Performing [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 143,531 | 139,239
Home equity | Non-Performing |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 9 | 260
Consumer |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 31,869 | 29,162
Consumer | Performing [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 31,869 | 29,162
Consumer | Non-Performing |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 0 | 0
DDA overdrafts |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 3,598 | 4,411
DDA overdrafts | Performing [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 3,598 | 4,411
DDA overdrafts | Non-Performing |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 0 | 0
Total |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 1,664,830 | 1,641,350
Total | Performing [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 1,661,769 | 1,638,257
Total | Non-Performing |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | $ 3,061 | $ 3,093

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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
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