Quarterly report pursuant to Section 13 or 15(d)

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

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HMBS Related Obligations, at Fair Value - Summary of HMBS Related Obligations, At Fair Value (Detail) - Home Equity Conversion Mortgage Backed Security - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Home Equity Conversion Mortgage Backed Security Related Obligations At Fair Value [Line Items]    
Ginnie Mae loan pools - UPB $ 10,445,730 $ 9,849,835
Fair value adjustments 300,149 572,523
Total HMBS related obligations, at fair value $ 10,745,879 $ 10,422,358
Weighted average remaining life (years) 4 years 1 month 6 days 4 years 7 months 6 days
Weighted average interest rate 3.30% 2.50%