v3.26.1
Fair Value - Weighted Average Unobservable Assumptions Used in the Fair Value Measurements (Details)
Mar. 31, 2026
yr
Dec. 31, 2025
yr
Minimum | Discount rate    
Unobservable Assumptions    
Retained bonds, measurement input (0.018) (0.017)
Minimum | Loans held for investment, subject to HMBS related obligations | Loss severity    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.056 0.058
Minimum | Non-agency reverse mortgage loans - securitized | HPA    
Unobservable Assumptions    
Loans held-for-investment, measurement input (0.033) (0.068)
Minimum | HECM buyouts - securitized (performing) | Loss severity    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.056 0.060
Minimum | HECM buyouts - securitized (nonperforming) | Loss severity    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.056 0.060
Minimum | Non-agency reverse mortgage loans | HPA    
Unobservable Assumptions    
Loans held-for-investment, measurement input (0.033) (0.068)
Minimum | HECM buyouts (nonperforming) | Loss severity    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.056 0.060
Minimum | Non-agency reverse mortgage loan securitizations | WAL (in years)    
Unobservable Assumptions    
Long-term debt, measurement input 0.1 0.1
Minimum | Performing/nonperforming HECM securitizations | WAL (in years)    
Unobservable Assumptions    
Long-term debt, measurement input 2.1  
Minimum | Performing/nonperforming HECM securitizations | CPR    
Unobservable Assumptions    
Long-term debt, measurement input 17.8  
Maximum | Discount rate    
Unobservable Assumptions    
Retained bonds, measurement input 0.137 0.153
Maximum | Loans held for investment, subject to HMBS related obligations | Loss severity    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.136 0.158
Maximum | Non-agency reverse mortgage loans - securitized | HPA    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.056 0.053
Maximum | HECM buyouts - securitized (performing) | Loss severity    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.136 0.133
Maximum | HECM buyouts - securitized (nonperforming) | Loss severity    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.136 0.133
Maximum | Non-agency reverse mortgage loans | HPA    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.056 0.053
Maximum | HECM buyouts (nonperforming) | Loss severity    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.142 0.133
Maximum | Non-agency reverse mortgage loan securitizations | WAL (in years)    
Unobservable Assumptions    
Long-term debt, measurement input 10.4 10.5
Maximum | Performing/nonperforming HECM securitizations | WAL (in years)    
Unobservable Assumptions    
Long-term debt, measurement input 2.3  
Maximum | Performing/nonperforming HECM securitizations | CPR    
Unobservable Assumptions    
Long-term debt, measurement input 20.6  
Weighted Average | WAL (in years)    
Unobservable Assumptions    
Retained bonds, measurement input 4.7 3.0
Weighted Average | Discount rate    
Unobservable Assumptions    
Retained bonds, measurement input 0.080 0.071
Weighted Average | Discount rate | TRA obligation    
Unobservable Assumptions    
Deferred purchase price liabilities, measurement input 0.303 0.266
Weighted Average | Loans held for investment, subject to HMBS related obligations | WAL (in years)    
Unobservable Assumptions    
Loans held-for-investment, measurement input 3.0 3.1
Weighted Average | Loans held for investment, subject to HMBS related obligations | CPR    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.212 0.209
Weighted Average | Loans held for investment, subject to HMBS related obligations | Loss frequency    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.044 0.045
Weighted Average | Loans held for investment, subject to HMBS related obligations | Loss severity    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.056 0.060
Weighted Average | Loans held for investment, subject to HMBS related obligations | Average draw rate    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.010 0.011
Weighted Average | Loans held for investment, subject to HMBS related obligations | Discount rate    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.048 0.047
Weighted Average | Non-agency reverse mortgage loans - securitized | WAL (in years)    
Unobservable Assumptions    
Loans held-for-investment, measurement input 10.0 9.8
Weighted Average | Non-agency reverse mortgage loans - securitized | CPR    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.149 0.150
Weighted Average | Non-agency reverse mortgage loans - securitized | Loss severity    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.100 0.100
Weighted Average | Non-agency reverse mortgage loans - securitized | Discount rate    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.064 0.063
Weighted Average | Non-agency reverse mortgage loans - securitized | LTV    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.502 0.499
Weighted Average | Non-agency reverse mortgage loans - securitized | HPA    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.038 0.037
Weighted Average | HECM buyouts - securitized (performing) | WAL (in years)    
Unobservable Assumptions    
Loans held-for-investment, measurement input 6.9 6.9
Weighted Average | HECM buyouts - securitized (performing) | CPR    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.163 0.163
Weighted Average | HECM buyouts - securitized (performing) | Loss severity    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.080 0.084
Weighted Average | HECM buyouts - securitized (performing) | Discount rate    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.073 0.073
Weighted Average | HECM buyouts - securitized (nonperforming) | WAL (in years)    
Unobservable Assumptions    
Loans held-for-investment, measurement input 1.5 1.5
Weighted Average | HECM buyouts - securitized (nonperforming) | CPR    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.410 0.415
Weighted Average | HECM buyouts - securitized (nonperforming) | Loss frequency    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.459 0.455
Weighted Average | HECM buyouts - securitized (nonperforming) | Loss severity    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.060 0.068
Weighted Average | HECM buyouts - securitized (nonperforming) | Discount rate    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.072 0.068
Weighted Average | Non-agency reverse mortgage loans | WAL (in years)    
Unobservable Assumptions    
Loans held-for-investment, measurement input 11.6 11.1
Weighted Average | Non-agency reverse mortgage loans | CPR    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.151 0.149
Weighted Average | Non-agency reverse mortgage loans | Loss severity    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.100 0.100
Weighted Average | Non-agency reverse mortgage loans | Discount rate    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.064 0.063
Weighted Average | Non-agency reverse mortgage loans | LTV    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.381 0.432
Weighted Average | Non-agency reverse mortgage loans | HPA    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.036 0.036
Weighted Average | HECM buyouts (nonperforming) | WAL (in years)    
Unobservable Assumptions    
Loans held-for-investment, measurement input 1.3 1.3
Weighted Average | HECM buyouts (nonperforming) | CPR    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.499 0.454
Weighted Average | HECM buyouts (nonperforming) | Loss frequency    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.605 0.423
Weighted Average | HECM buyouts (nonperforming) | Loss severity    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.142 0.112
Weighted Average | HECM buyouts (nonperforming) | Discount rate    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.072 0.068
Weighted Average | HMBS related obligations | WAL (in years)    
Unobservable Assumptions    
Loans held-for-investment, measurement input 3.8 3.9
Weighted Average | HMBS related obligations | CPR    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.252 0.248
Weighted Average | HMBS related obligations | Discount rate    
Unobservable Assumptions    
Loans held-for-investment, measurement input 0.047 0.046
Weighted Average | Non-agency reverse mortgage loan securitizations | WAL (in years)    
Unobservable Assumptions    
Long-term debt, measurement input 6.1 6.4
Weighted Average | Non-agency reverse mortgage loan securitizations | CPR    
Unobservable Assumptions    
Long-term debt, measurement input 0.248 0.218
Weighted Average | Non-agency reverse mortgage loan securitizations | Discount rate    
Unobservable Assumptions    
Long-term debt, measurement input 0.061 0.060
Weighted Average | Performing/nonperforming HECM securitizations | WAL (in years)    
Unobservable Assumptions    
Long-term debt, measurement input 2.2 1.2
Weighted Average | Performing/nonperforming HECM securitizations | CPR    
Unobservable Assumptions    
Long-term debt, measurement input 0.191 0.574
Weighted Average | Performing/nonperforming HECM securitizations | Discount rate    
Unobservable Assumptions    
Long-term debt, measurement input 0.053 0.054