Annual report pursuant to Section 13 and 15(d)

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

v3.22.0.1
Nonrecourse Debt, at Fair Value - Summary of Nonrecourse Debt at Fair Value (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Original Issue Amount $ 350,000 $ 350,009
Total nonrecourse debt 5,821,684 5,155,007
Nonrecourse MSR financing liability 142,435 14,088
Fair value adjustments 39,379 102,747
Total nonrecourse debt, at fair value 6,111,242 5,271,842
Nonrecourse Commercial loan financing liability $ 107,744 0
Securitization of nonperforming HECM loans    
Debt Instrument [Line Items]    
Issue Date February 2020 - February 2021  
Final Maturity Date February 2030 - February 2031  
Original Issue Amount $ 1,539,531  
Total nonrecourse debt $ 922,970 775,030
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 $ 6,150,643  
Total nonrecourse debt $ 4,630,203 4,037,184
Securitization of non-agency reverse loans    
Debt Instrument [Line Items]    
Issue Date May 2018 - December 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  
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%