Annual report pursuant to Section 13 and 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
Dec. 31, 2022
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fair value adjustments $ (191,457) $ 663,927
Total loans held for investment, subject to nonrecourse debt, at fair value 7,454,638 6,218,194
Reverse mortgage loans    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans held for investment, subject to nonrecourse debt - UPB 7,240,125 5,165,479
Commercial mortgage loans    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans held for investment, subject to nonrecourse debt - UPB $ 405,970 $ 388,788