Quarterly report pursuant to Section 13 or 15(d)

Nonrecourse Debt, at Fair Value - Summary of Nonrecourse Debt at Fair Value (Detail)

v3.24.3
Nonrecourse Debt, at Fair Value - Summary of Nonrecourse Debt at Fair Value (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2024
Dec. 31, 2023
Debt Instrument [Line Items]    
Nonrecourse debt, at fair value $ 8,537,119 $ 7,904,200
Nonrecourse    
Debt Instrument [Line Items]    
Unpaid Principal Balance 8,490,640 8,087,453
Nonrecourse reverse loan financing liability 356,368 341,682
Nonrecourse commercial loan financing liability 14,075 26,661
Fair value adjustments $ (323,964) (551,596)
Securitization of non-agency reverse loans    
Debt Instrument [Line Items]    
Issue Date May 2018 - July 2024  
Final Maturity Date May 2050 - July 2074  
Original Issue Amount $ 9,808,631  
Securitization of non-agency reverse loans | Nonrecourse    
Debt Instrument [Line Items]    
Unpaid Principal Balance $ 7,923,846 7,331,305
Securitization of non-agency reverse loans | Minimum    
Debt Instrument [Line Items]    
Interest Rate 1.25%  
Securitization of non-agency reverse loans | Maximum    
Debt Instrument [Line Items]    
Interest Rate 4.50%  
Securitization of performing/nonperforming HECM loans    
Debt Instrument [Line Items]    
Issue Date February 2022 - August 2022  
Final Maturity Date February 2032 - August 2032  
Original Issue Amount $ 1,084,935  
Securitization of performing/nonperforming HECM loans | Nonrecourse    
Debt Instrument [Line Items]    
Unpaid Principal Balance $ 545,604 672,911
Securitization of performing/nonperforming HECM loans | Minimum    
Debt Instrument [Line Items]    
Interest Rate 2.69%  
Securitization of performing/nonperforming HECM loans | Maximum    
Debt Instrument [Line Items]    
Interest Rate 9.32%  
Securitization of commercial loans    
Debt Instrument [Line Items]    
Issue Date May 2024  
Final Maturity Date May 2026  
Original Issue Amount $ 39,016  
Securitization of commercial loans | Nonrecourse    
Debt Instrument [Line Items]    
Unpaid Principal Balance $ 21,190 $ 83,237
Securitization of commercial loans | Minimum    
Debt Instrument [Line Items]    
Interest Rate 9.49%