Purchased Receivables - Summary of Components of Net Purchased Receivables (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Purchased Receivables [Abstract]
Purchased receivables	$ 23,769	$ 24,467
Reserve for purchased receivable losses	(99)	(94)
Total	$ 23,670	$ 24,373