Quarterly report pursuant to Section 13 or 15(d)

Loans Held for Investment, at Fair Value - Schedule of Mortgage Loans Held For Investment At Fair Value (Detail)

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Loans Held for Investment, at Fair Value - Schedule of Mortgage Loans Held For Investment At Fair Value (Detail) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Loans held for investment—UPB:    
Fair value adjustments $ 115,578 $ 126,635
Total loans held for investment, at fair value 1,218,990 1,031,328
Reverse Mortgage Loans [Member]    
Loans held for investment—UPB:    
Mortgage loans held for investment 988,321 815,426
Commercial Mortgage Loans [Member]    
Loans held for investment—UPB:    
Mortgage loans held for investment $ 115,091 $ 89,267