2. Finance Receivables (Details - Finance credit losses) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Receivables [Abstract]
Allowance for credit losses, beginning balance	$ 48,196	$ 100,844	$ 67,376	$ 109,187
Provision for credit losses	20,489	35,531	44,445	76,038
Charge-offs	(50,409)	(53,493)	(102,919)	(109,595)
Recoveries	14,388	11,494	23,762	18,746
Allowance for credit losses, ending balance	$ 32,664	$ 94,376	$ 32,664	$ 94,376