Purchased Receivables - Allowance on Net Purchase Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Purchased Receivable Allowance for Loan Loss Reserve [Roll Forward]
Balance, beginning of period			$ 94
Balance, end of period	$ 87		87
Purchased Receivable
Purchased Receivable Allowance for Loan Loss Reserve [Roll Forward]
Balance, beginning of period	93	$ 98	94	$ 190
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Charge-offs net of recoveries	0	0	0	0
Benefit for purchased receivables	(6)	(11)	(7)	(103)
Balance, end of period	$ 87	$ 87	$ 87	$ 87