Revenue - Fees Collected (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Revenue from fees, net	$ 143,689	$ 258,345	$ 260,830	$ 572,327
Collection agency fees
Disaggregation of Revenue [Line Items]
Revenue from fees, net	3,752	2,565	7,668	4,555
Borrower fees
Disaggregation of Revenue [Line Items]
Revenue from fees, net	$ 6,904	$ 5,890	$ 14,641	$ 11,120