2. Finance Receivables (Details-Allowance for finance credit losses) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Finance Receivables
Balance at beginning of period	$ 99,255	$ 79,867	$ 95,578	$ 75,603
Provision for credit losses on finance receivables	48,550	44,423	95,717	88,619
Charge-offs	(48,474)	(41,901)	(98,773)	(87,834)
Recoveries	7,984	7,779	14,793	13,780
Balance at end of period	$ 107,315	$ 90,168	$ 107,315	$ 90,168