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Fair Value Fair Value (Impaired Financing Receivables Additional Information) (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019 | Sep. 30, 2019
Schedule of Impaired Financing Receivables Additional Information [Line Items] |  |  |
Book Value Of Impaired Loans Carried At Fair Value | $ 19,395 | $ 2,167 |
Partial Charge-Offs On Impaired Loans carried at Fair Value | 247 | 313 |
Impaired Financing Receivable, Related Allowance | 8,666 | 5,230 |
impaired Financing Receivable, loans not held at Fair Value, Carrying Amount | 91,288 | 70,171 |
Impaired Financing Receivable, Recorded Investment | 116,180 | 77,491 | $ 74,478
Impaired Loan Fair Value | 16,226 | 2,090 |
Impaired Financing Receivable, loans not held at Fair Value, Recorded Investment | 96,785 | 75,324 |
Partial Charge-offs on Impaired Loans carried at Cost | 316 | 406 |
Impaired Financing Receivable, Carrying Value | 107,514 | 72,261 |
Partial Charge-Offs On Impaired Loans | 563 | 719 |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 8,666 | 5,230 |
Financing Receivable, not collateral dependent [Domain] |  |  |
Schedule of Impaired Financing Receivables Additional Information [Line Items] |  |  |
Impaired Financing Receivable, Related Allowance | 5,497 | 5,153 |
Commercial Receivables, excluding Commercial, Financial, and Agricultural [Domain] |  |  |
Schedule of Impaired Financing Receivables Additional Information [Line Items] |  |  |
Impaired Financing Receivable, Related Allowance | $ 3,169 | $ 77 |

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