Purchased Receivables - Summary of Components of Net Purchased Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Purchased Receivables [Abstract]
Purchased receivables	$ 11,642	$ 24,467
Reserve for purchased receivable losses	(93)	(94)
Total	$ 11,549	$ 24,373