Receivables Due From Servicers - Summary of Receivables Due From Servicers (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Related Party Transaction [Line Items]
Loan principal payments due from servicers	$ 25,064	$ 43,509
Other loan servicing receivables	15,616	11,448
Loan servicing receivables	40,680	54,957
Corporate and escrow advances receivable	24,964	19,373
Total receivables due from servicers	65,644	74,330
Securitizations
Related Party Transaction [Line Items]
Loan principal payments due from servicers	24,400	42,344
Other loan servicing receivables	13,095	10,718
Loan servicing receivables	37,495	53,062
Corporate and escrow advances receivable	21,995	17,884
Total receivables due from servicers	59,490	70,946
Warehouse and Repurchase Facilities and Other
Related Party Transaction [Line Items]
Loan principal payments due from servicers	664	1,165
Other loan servicing receivables	2,521	730
Loan servicing receivables	3,185	1,895
Corporate and escrow advances receivable	2,969	1,489
Total receivables due from servicers	$ 6,154	$ 3,384