(12) Fair Value Measurements (Details - Delinquency status) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Finance receivables measured at fair value current	$ 1,505,486	$ 1,344,883
Finance receivables measured at fair value	1,668,076	1,492,803
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Finance receivables measured at fair value	96,296	81,262
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Finance receivables measured at fair value	36,436	34,280
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Finance receivables measured at fair value	9,607	15,167
Repossessed Vehicles [Member]
Financing Receivable, Past Due [Line Items]
Finance receivables measured at fair value	$ 20,251	$ 17,211