Quarterly report pursuant to Section 13 or 15(d)

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

v3.23.2
Nonrecourse Debt, at Fair Value - Summary of Nonrecourse Debt at Fair Value (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2023
Dec. 31, 2022
Debt Instrument [Line Items]    
Nonrecourse MSR financing liability, at fair value $ 0 $ 60,562
Nonrecourse reverse loan financing liability 328,769 0
Nonrecourse commercial loan financing liability 57,543 105,291
Fair value adjustments (682,297) (642,668)
Total nonrecourse debt, at fair value 7,796,545 7,343,177
Nonrecourse    
Debt Instrument [Line Items]    
Unpaid Principal Balance $ 8,092,530 7,819,992
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 $ 868,971 953,336
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 non-agency reverse loans    
Debt Instrument [Line Items]    
Issue Date May 2018 -April 2023  
Final Maturity Date May 2050 - April 2073  
Original Issue Amount $ 8,793,599  
Securitization of non-agency reverse loans | Nonrecourse    
Debt Instrument [Line Items]    
Unpaid Principal Balance $ 7,007,955 6,598,145
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 Fix & Flip loans    
Debt Instrument [Line Items]    
Issue Date April 2021  
Final Maturity Date May 2025  
Original Issue Amount $ 268,511  
Securitization of Fix & Flip loans | Nonrecourse    
Debt Instrument [Line Items]    
Unpaid Principal Balance $ 215,604 $ 268,511
Securitization of Fix & Flip loans | Minimum    
Debt Instrument [Line Items]    
Interest Rate 2.10%  
Securitization of Fix & Flip loans | Maximum    
Debt Instrument [Line Items]    
Interest Rate 5.40%