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Allowance For Loan Losses (Schedule Of Credit Quality Indicators) (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
SharedNationalCreditMinimumBalanceforRegulatoryReview | $ 20,000 |
Total | 3,105,912 | $ 3,046,226
Commercial Industrial Loans And Commercial Real Estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 1,465,628 | 1,415,183
Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 204,722 | 185,667
Commercial real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 1,260,906 | 1,229,516
Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 1,380,934 | 1,355,111
Pass | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 166,408 | 176,823
Pass | Commercial real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 1,214,526 | 1,178,288
Special mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 38,908 | 18,458
Special mention | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
SharedNationalCreditBalance | 25,800 |
Total | 26,228 | 2,427
Special mention | Commercial real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 12,680 | 16,031
Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 45,786 | 41,614
Substandard | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 12,086 | 6,417
Substandard | Commercial real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 33,700 | 35,197
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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65884687&loc=d3e4428-111522 + Details
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