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Fair Value Impaired financing receivables (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Financing Receivable, Impaired [Line Items] |  |  |
Book Value Of Impaired Loans Carried At Fair Value | $ 2,167 | $ 6,503 |
Partial Charge-Offs On Impaired Loans carried at Fair Value | 313 | 3,630 |
Impaired Financing Receivable, Related Allowance | 5,230 | 2,273 |
Impaired loans carried at fair value | 2,090 | 6,399 |
Impaired Financing Receivable, loans not held at Fair Value, Recorded Investment | 75,324 | 41,641 |
Partial Charge-offs on Impaired Loans carried at Cost | 406 | 7,616 |
impaired Financing Receivable, loans not held at Fair Value, Carrying Amount | 70,171 | 39,472 |
Impaired Financing Receivable, Recorded Investment | 77,491 | 48,144 | $ 56,564
Partial charge-offs on impaired loans | 719 | 11,246 |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 5,230 | 2,273 |
Impaired Financing Receivable, Carrying Value | 72,261 | 45,871 |
Impaired Financing Receivable, carried at fair value, related expense | 200 | 400 | $ 1,600
Commercial Receivables, excluding Commercial, Financial, and Agricultural [Domain] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Related Allowance | 77 | 104 |
Financing Receivable, not collateral dependent [Domain] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Related Allowance | $ 5,153 | $ 2,169 |

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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=118936363&loc=SL6953423-111524 + Details
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