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Loans And Related Allowances For Loan Losses (Modification of Troubled Debt Restructuring by Class) (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) contract | Sep. 30, 2019 USD ($) contract | Sep. 30, 2020 USD ($) contract | Sep. 30, 2019 USD ($) contract
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts |  |  | 10,468 |
Temporary Rate Modification [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts |  | 1 | 1 | 1
Recorded Investment | $ |  | $ 149 | $ 46 | $ 149
Temporary Rate Modification [Member] | Residential mortgage- term [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts |  | 1 | 1 | 1
Recorded Investment | $ |  | $ 149 | $ 46 | $ 149
Extension Of Maturity [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts | 2 |  | 4 |
Recorded Investment | $ | $ 440 |  | $ 887 |
Extension Of Maturity [Member] | Acquisition and development- All other A&D [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts | 1 |  | 2 |
Recorded Investment | $ | $ 213 |  | $ 430 |
Extension Of Maturity [Member] | Residential mortgage- term [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts | 1 |  | 2 |
Recorded Investment | $ | $ 227 |  | $ 457 |
Modification Of Payment And Other Terms [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts | 1 |  | 4 | 2
Recorded Investment | $ | $ 111 |  | $ 2,582 | $ 470
Modification Of Payment And Other Terms [Member] | Commercial real estate- all other CRE [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts |  |  | 1 |
Recorded Investment | $ |  |  | $ 2,226 |
Modification Of Payment And Other Terms [Member] | Acquisition and development- All other A&D [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts |  |  |  | 1
Recorded Investment | $ |  |  |  | $ 227
Modification Of Payment And Other Terms [Member] | Residential mortgage- term [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Contracts | 1 |  | 3 | 1
Recorded Investment | $ | $ 111 |  | $ 356 | $ 243

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
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