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Allowance For Loan Losses (Schedule Of Information Related To Average Recorded Investment And Interest Income Recognized On Impaired Loans) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Financing Receivable, Impaired [Line Items] |  |
With no related allowance recorded, Average recorded investment | $ 5,620 | $ 6,138
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method | 69 | 14
With an allowance recorded, Average recorded investment | 4,307 | 1,419
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method | 149 | 24
Commercial and industrial |  |
Financing Receivable, Impaired [Line Items] |  |
With no related allowance recorded, Average recorded investment | 1,086 | 2,099
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method | 0 | 0
With an allowance recorded, Average recorded investment | 0 | 0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method | 0 | 0
Commercial real estate |  |
Financing Receivable, Impaired [Line Items] |  |
With no related allowance recorded, Average recorded investment | 4,534 | 4,039
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method | 69 | 14
With an allowance recorded, Average recorded investment | 4,307 | 1,419
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method | $ 149 | $ 24

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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 of average investment of impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 + Details
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- Definition Amount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 + Details
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- Definition Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524 + Details
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