Current report filing

Concentrations of Risk - Narrative (Details)

v3.23.2
Concentrations of Risk - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2020
May 31, 2021
Jul. 31, 2017
Concentration Risk [Line Items]            
Total payments on nonrecourse debt   $ 353,383 $ 399,402      
Mezzanine Financing Agreement | Non-Affiliated Blackstone Portfolio Companies            
Concentration Risk [Line Items]            
Total payments on nonrecourse debt   21,500 25,000      
Original Issue Amount         $ 25,000 $ 45,000
Private investors            
Concentration Risk [Line Items]            
Transfer of loans held-for-sale to portfolio loans $ 854,100 $ 3,491,700 $ 3,373,100 $ 3,613,400    
Private investors | Non-agency reverse mortgage loans | Credit Concentration Risk            
Concentration Risk [Line Items]            
Concentration risk percentage   39.70% 84.50% 55.20%    
Private investors | Commercial Loans | Credit Concentration Risk            
Concentration Risk [Line Items]            
Concentration risk percentage 33.10% 12.90% 7.50% 12.30%    
Private investors | Residential mortgage loans | Credit Concentration Risk            
Concentration Risk [Line Items]            
Concentration risk percentage 66.90% 47.40% 8.00% 26.00%    
Private investors | Agency Reverse Mortgage Loan | Credit Concentration Risk            
Concentration Risk [Line Items]            
Concentration risk percentage       6.50%    
FNMA, FHLMC, and Ginnie Mae            
Concentration Risk [Line Items]            
Transfer of loans held-for-sale to portfolio loans $ 450,100 $ 1,965,400 $ 2,255,500 $ 1,479,900