Annual report [Section 13 and 15(d), not S-K Item 405]

Summary of Significant Accounting Policies - Narrative (Details)

v3.25.0.1
Summary of Significant Accounting Policies - Narrative (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jul. 25, 2024
Dec. 31, 2024
USD ($)
$ / shares
Dec. 31, 2023
USD ($)
Subsequent Event [Line Items]      
Reverse mortgage loans held for investment, subject to nonrecourse debt   $ 9,186,447 $ 8,257,750
Receivables due from investors (in percent)   100.00%  
Gross carrying value of fixed assets   $ 14,500 16,300
Acccumulated depreciation and amortization   10,700 10,300
Fixed assets, net   3,824 5,967
Depreciation expense   1,700 5,200
Impairment charges   500 1,800
Loan origination fees   28,500 36,600
Loan servicing fees   1,700 8,100
Employer contributions   $ 2,100 2,500
Class A Common Stock      
Subsequent Event [Line Items]      
Reverse Stock Split - conversion ratio 0.1    
Class A LLC Units      
Subsequent Event [Line Items]      
Reverse Stock Split - conversion ratio 0.1    
Earnout Shares, Tranche One      
Subsequent Event [Line Items]      
Volume weighted average price (in dollars per share) | $ / shares   $ 125  
Number of trading days for determining the volume weighted average share price   20 days  
Number of consecutive trading days for determining the volume weighted average share price   30 days  
Earnout shares to be issued (in percent)   50.00%  
Earnout Shares, Tranche Two      
Subsequent Event [Line Items]      
Volume weighted average price (in dollars per share) | $ / shares   $ 150  
Number of trading days for determining the volume weighted average share price   20 days  
Number of consecutive trading days for determining the volume weighted average share price   30 days  
Earnout shares to be issued (in percent)   50.00%  
Maximum      
Subsequent Event [Line Items]      
Maximum claim amount (in percent)   98.00%  
Estimated Useful Life   7 years  
Minimum      
Subsequent Event [Line Items]      
Estimated Useful Life   3 years  
Non-agency reverse mortgages      
Subsequent Event [Line Items]      
Reverse mortgage loans held for investment, subject to nonrecourse debt   $ 8,567,792 $ 7,631,601
Non-agency reverse mortgages | Maximum      
Subsequent Event [Line Items]      
Reverse mortgage loans held for investment, subject to nonrecourse debt   $ 4,000  
After October Two Twenty Seventeen      
Subsequent Event [Line Items]      
Rate of MIP amount on mortgage balance for loans   1.25%  
Before October Two Twenty Seventeen      
Subsequent Event [Line Items]      
Rate of MIP amount on mortgage balance for loans   0.50%