Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Nonrecourse Debt, at Fair Value - Summary of Nonrecourse Debt at Fair Value (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Original Issue Amount $ 350,000 $ 350,009
Total nonrecourse debt 5,654,826 5,155,007
Nonrecourse MSR financing liability, at fair value 96,073 14,088
Fair value adjustments 80,184 102,747
Total nonrecourse debt, at fair value $ 5,831,083 5,271,842
Securitization of nonperforming HECM loans    
Debt Instrument [Line Items]    
Issue Date February 2020 - February 2021  
Class of Note A, M1, M2, M3, M4, M5  
Final Maturity Date February 2030 - February 2031  
Original Issue Amount $ 1,539,531  
Total nonrecourse debt $ 951,251 775,030
Securitization of nonperforming HECM loans | Minimum [Member]    
Debt Instrument [Line Items]    
Interest Rate 0.88%  
Securitization of nonperforming HECM loans | Maximum [Member]    
Debt Instrument [Line Items]    
Interest Rate 9.00%  
Securitization of performing HECM loans    
Debt Instrument [Line Items]    
Original Issue Amount $ 5,744,467  
Total nonrecourse debt $ 4,435,064 4,037,184
Securitization of non-agency reverse loans    
Debt Instrument [Line Items]    
Issue Date May 2018 - September 2021  
Final Maturity Date April 2023 - November 2069  
Original Issue Amount $ 1,002,424  
Total nonrecourse debt $ 268,511 $ 342,793
Securitization of non-agency reverse loans | Minimum [Member]    
Debt Instrument [Line Items]    
Interest Rate 1.25%  
Securitization of non-agency reverse loans | Maximum [Member]    
Debt Instrument [Line Items]    
Interest Rate 4.50%  
Securitization of fix & flip loans    
Debt Instrument [Line Items]    
Issue Date September 2018 - April 2021  
Class of Note A1, A2, A-VFN, M  
Final Maturity Date May 2022 - May 2025  
Securitization of fix & flip loans | Minimum [Member]    
Debt Instrument [Line Items]    
Interest Rate 2.10%  
Securitization of fix & flip loans | Maximum [Member]    
Debt Instrument [Line Items]    
Interest Rate 8.00%