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Loans And Related Allowances For Loan Losses (Modification of Troubled Debt Restructuring by Class) (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 USD ($) contract | Jun. 30, 2020 USD ($) contract | Jun. 30, 2019 USD ($) contract
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | contract |  | 10,811 | 2
Recorded Investment | $ | $ 1,042,514 | $ 1,042,514 | $ 470
Acquisition and development- All other A&D [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | contract |  |  | 1
Recorded Investment | $ |  |  | $ 227
Residential mortgage- term [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | contract |  |  | 1
Recorded Investment | $ |  |  | $ 243
Temporary Rate Modification [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | contract | 1 | 1 |
Recorded Investment | $ | $ 46 | $ 46 |
Temporary Rate Modification [Member] | Residential mortgage- term [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | contract | 1 | 1 |
Recorded Investment | $ | $ 46 | $ 46 |
Extension Of Maturity [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | contract | 2 | 2 |
Recorded Investment | $ | $ 447 | $ 447 |
Extension Of Maturity [Member] | Acquisition and development- All other A&D [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | contract | 1 | 1 |
Recorded Investment | $ | $ 217 | $ 217 |
Extension Of Maturity [Member] | Residential mortgage- term [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | contract | 1 | 1 |
Recorded Investment | $ | $ 230 | $ 230 |
Modification Of Payment And Other Terms [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | contract | 3 | 3 |
Recorded Investment | $ | $ 2,471 | $ 2,471 |
Modification Of Payment And Other Terms [Member] | Commercial real estate- all other CRE [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | contract | 1 | 1 |
Recorded Investment | $ | $ 2,226 | $ 2,226 |
Modification Of Payment And Other Terms [Member] | Residential mortgage- term [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | contract | 2 | 2 |
Recorded Investment | $ | $ 245 | $ 245 |

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