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Allowance For Loan Losses (Schedule Of Credit Quality Indicators) (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Total | $ 3,146,697 | $ 3,127,410
Commercial Industrial Loans And Commercial Real Estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 1,481,867 | 1,486,060
Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 213,815 | 208,484
Commercial real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 1,268,052 | 1,277,576
Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 1,410,991 | 1,407,207
Pass | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 182,275 | 175,951
Pass | Commercial real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 1,228,716 | 1,231,256
Special mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 33,766 | 33,940
Special mention | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 26,345 | 25,872
Special mention | Commercial real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 7,421 | 8,068
Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 37,110 | 44,913
Substandard | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 5,195 | 6,661
Substandard | Commercial real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 31,915 | 38,252
Doubtful |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 0 | 0
Doubtful | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 0 | 0
Doubtful | Commercial real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | $ 0 | $ 0

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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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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