Annual report pursuant to Section 13 and 15(d)

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

v3.22.4
Nonrecourse Debt, at Fair Value - Summary of Nonrecourse Debt at Fair Value (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Nonrecourse MSR financing liability, at fair value $ 60,562 $ 142,435
Nonrecourse commercial loan financing liability 105,291 107,744
Fair value adjustments (642,668) 39,379
Total nonrecourse debt, at fair value 7,343,177 6,111,242
Nonrecourse    
Debt Instrument [Line Items]    
Unpaid Principal Balance $ 7,819,992 5,821,684
Securitization of performing / nonperforming HECM loans    
Debt Instrument [Line Items]    
Issue Date July 2020 - August 2022  
Final Maturity Date July 2030 - August 2032  
Original Issue Amount $ 2,250,554  
Securitization of performing / nonperforming HECM loans | Nonrecourse    
Debt Instrument [Line Items]    
Unpaid Principal Balance $ 953,336 922,970
Securitization of performing / nonperforming HECM loans | Minimum    
Debt Instrument [Line Items]    
Interest Rate 0.88%  
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 - December 2022  
Final Maturity Date March 2050 - November 2069  
Original Issue Amount $ 8,363,562  
Securitization of non-agency reverse loans | Nonrecourse    
Debt Instrument [Line Items]    
Unpaid Principal Balance $ 6,598,145 4,630,203
Securitization of non-agency reverse loans | Minimum    
Debt Instrument [Line Items]    
Interest Rate 1.75%  
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 $ 268,511 $ 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%