Quarterly report pursuant to Section 13 or 15(d)

Loans Held for Investment, Subject to Nonrecourse Debt, at Fair Value (Details)

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Loans Held for Investment, Subject to Nonrecourse Debt, at Fair Value (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value adjustments $ (217,336) $ 663,927
Total loans held for investment, subject to nonrecourse debt, at fair value 6,741,391 6,218,194
Reverse mortgage loans    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans held for investment, subject to nonrecourse debt - UPB 6,501,202 5,165,479
Commercial mortgage loans    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans held for investment, subject to nonrecourse debt - UPB $ 457,525 $ 388,788