Quarterly report pursuant to Section 13 or 15(d)

HMBS Related Obligations, at Fair Value - Summary of HMBS Related Obligations, At Fair Value (Detail)

v3.23.1
HMBS Related Obligations, at Fair Value - Summary of HMBS Related Obligations, At Fair Value (Detail) - Home Equity Conversion Mortgage Backed Security - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Home Equity Conversion Mortgage Backed Security Related to Obligations At Fair Value [Line Items]      
Ginnie Mae loan pools - UPB $ 15,850,053   $ 10,719,000
Fair value adjustments 557,576   277,755
Total HMBS related obligations, at fair value $ 16,407,629   $ 10,996,755
Weighted average remaining life (in years) 4 years 4 months 24 days 4 years  
Weighted average interest rate 5.70%   5.00%