Annual report [Section 13 and 15(d), not S-K Item 405]

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

v3.25.0.1
Nonrecourse Debt, at Fair Value - Summary of Nonrecourse Debt at Fair Value (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Debt Instrument [Line Items]    
Nonrecourse debt, at fair value $ 8,954,068 $ 7,904,200
Nonrecourse    
Debt Instrument [Line Items]    
Unpaid Principal Balance 8,989,848 8,087,453
Nonrecourse reverse loan financing liability 361,284 341,682
Nonrecourse commercial loan financing liability 12,787 26,661
Fair value adjustments $ (409,851) (551,596)
Securitization of non-agency reverse loans    
Debt Instrument [Line Items]    
Issue Date May 2018 - December 2024  
Final Maturity Date May 2050 - December 2074  
Original Issue Amount $ 10,124,527  
Securitization of non-agency reverse loans | Nonrecourse    
Debt Instrument [Line Items]    
Unpaid Principal Balance $ 8,304,568 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 October 2024  
Final Maturity Date October 2034  
Original Issue Amount $ 705,400  
Securitization of performing/nonperforming HECM loans | Nonrecourse    
Debt Instrument [Line Items]    
Unpaid Principal Balance $ 677,035 672,911
Securitization of performing/nonperforming HECM loans | Minimum    
Debt Instrument [Line Items]    
Interest Rate 4.00%  
Securitization of performing/nonperforming HECM loans | Maximum    
Debt Instrument [Line Items]    
Interest Rate 6.00%  
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 $ 8,245 $ 83,237
Securitization of commercial loans | Minimum    
Debt Instrument [Line Items]    
Interest Rate 9.49%