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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, 2021 | Dec. 31, 2020 | Sep. 30, 2020
Schedule of Impaired Financing Receivables Additional Information [Line Items] |  |  |
Book Value Of Impaired Loans Carried At Fair Value | $ 1,028 | $ 8,256 |
Partial Charge-Offs On Impaired Loans carried at Fair Value | 240 | 269 |
Impaired Financing Receivable, Related Allowance |  | 5,434 |
impaired Financing Receivable, loans not held at Fair Value, Carrying Amount | 74,950 | 96,097 |
Impaired Financing Receivable, Recorded Investment | 79,264 | 108,455 | $ 116,180
Impaired Loan Fair Value | 848 | 6,924 |
Impaired Financing Receivable, loans not held at Fair Value, Recorded Investment | 78,236 | 100,199 |
Partial Charge-offs on Impaired Loans carried at Cost | 448 | 386 |
Impaired Financing Receivable, Carrying Value | 75,798 | 103,021 |
Partial Charge-Offs On Impaired Loans | 688 | 655 |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 3,466 | 5,434 |
Financing Receivable, not collateral dependent [Domain] |  |  |
Schedule of Impaired Financing Receivables Additional Information [Line Items] |  |  |
Impaired Financing Receivable, Related Allowance | 3,286 | 4,102 |
Commercial Receivables, excluding Commercial, Financial, and Agricultural [Domain] |  |  |
Schedule of Impaired Financing Receivables Additional Information [Line Items] |  |  |
Impaired Financing Receivable, Related Allowance | $ 180 | $ 1,332 |

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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
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