Revenue - Schedule of Collection Agency and Borrower Fees (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue from fees, net	$ 130,532	$ 143,689	$ 268,600	$ 260,830
Net loss on servicing rights and fair value adjustments	(602)	(747)	(1,488)	(1,737)
Servicing fees
Disaggregation of Revenue [Line Items]
Revenue from fees, net	21,951	27,970	45,193	56,498
Borrower fees
Disaggregation of Revenue [Line Items]
Revenue from fees, net	6,356	6,904	13,515	14,641
Collection agency fees
Disaggregation of Revenue [Line Items]
Revenue from fees, net	4,117	3,752	8,713	7,668
Other fees
Disaggregation of Revenue [Line Items]
Revenue from fees, net	115	45	213	338
Servicing and other fees, net
Disaggregation of Revenue [Line Items]
Revenue from fees, net	$ 31,937	$ 37,924	$ 66,146	$ 77,408