Receivables Due From Servicers - Summary of Receivables Due From Servicers (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Related Party Transaction [Line Items]
Loan principal payments due from servicers	$ 43,202	$ 43,509
Other loan servicing receivables	14,438	11,448
Loan Servicing Receivables Current, Total	57,640	54,957
Corporate and escrow advances receivable	18,048	19,373
Total receivables due from servicers	75,688	74,330
Securitizations
Related Party Transaction [Line Items]
Loan principal payments due from servicers	41,347	42,344
Other loan servicing receivables	13,024	10,718
Loan Servicing Receivables Current, Total	54,371	53,062
Corporate and escrow advances receivable	17,985	17,884
Total receivables due from servicers	72,356	70,946
Warehouse and Repurchase Facilities and Other
Related Party Transaction [Line Items]
Loan principal payments due from servicers	1,855	1,165
Other loan servicing receivables	1,414	730
Loan Servicing Receivables Current, Total	3,269	1,895
Corporate and escrow advances receivable	63	1,489
Total receivables due from servicers	$ 3,332	$ 3,384