Quarterly report pursuant to Section 13 or 15(d)

Mortgage Loans Held for Investment, Subject to Nonrecourse Debt, at Fair Value - Schedule of Mortgage Loans Held For Investment, Subject to Nonrecourse Debt, at Fair Value (Detail)

v3.21.2
Mortgage Loans Held for Investment, Subject to Nonrecourse Debt, at Fair Value - Schedule of Mortgage Loans Held For Investment, Subject to Nonrecourse Debt, at Fair Value (Detail) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Mortgage Loans Held For Investment Subject To Nonrecourse Debt At Fair Value [Line Items]    
Fair value adjustments $ 579,635 $ 605,018
Total mortgage loans held for investment, subject to nonrecourse debt, at fair value 5,424,621 5,396,167
Reverse mortgage loans    
Mortgage Loans Held For Investment Subject To Nonrecourse Debt At Fair Value [Line Items]    
Mortgage loans held for investment, subject to nonrecourse debt 4,615,128 4,457,805
Commercial mortgage loans    
Mortgage Loans Held For Investment Subject To Nonrecourse Debt At Fair Value [Line Items]    
Mortgage loans held for investment, subject to nonrecourse debt $ 229,858 $ 333,344