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(12) Fair Value Measurements (Details - Level 3 Fair Value Measurements) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Finance receivables measured at fair value | $ 1,523,726 | $ 1,444,038 | $ 821,066
Portion at Fair Value Measurement [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Finance receivables measured at fair value | 1,523,726 | 1,444,038 |
Portion at Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Finance receivables measured at fair value | $ 1,523,726 | $ 1,444,038 |
Portion at Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Discount Rate [Member] | Minimum [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Warrants | 10.40% | 8.90% |
Portion at Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Discount Rate [Member] | Maximum [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Warrants | 11.10% | 11.10% |
Portion at Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input Cumulative Net Lossese [Member] | Minimum [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Warrants | 15.30% | 15.00% |
Portion at Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input Cumulative Net Lossese [Member] | Maximum [Member] |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Warrants | 18.40% | 16.10% |

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