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13. Fair Value Measurements (Details - Finance Receivables to Their Contractual Balances) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Finance receivables measured at fair value $ 1,444,038 $ 821,066 $ 0
Fair Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Finance receivables measured at fair value 1,444,038 821,066  
Contractual Balance [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Finance receivables measured at fair value $ 1,492,803 $ 829,039