Revenue - Schedule of Collection Agency and Borrower Fees (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue from fees, net	$ 950,011	$ 635,466	$ 560,431
Net gain (loss) on servicing rights and fair value adjustments	10,299	206	(6,444)
Servicing fees
Disaggregation of Revenue [Line Items]
Revenue from fees, net	100,164	89,323	107,008
Borrower fees
Disaggregation of Revenue [Line Items]
Revenue from fees, net	29,375	26,444	29,139
Collection agency fees
Disaggregation of Revenue [Line Items]
Revenue from fees, net	14,434	16,405	15,865
Other fees
Disaggregation of Revenue [Line Items]
Revenue from fees, net	2,760	677	743
Servicing and other fees, net
Disaggregation of Revenue [Line Items]
Revenue from fees, net	$ 157,032	$ 133,055	$ 146,311