Annual report pursuant to Section 13 and 15(d)

Concentrations of Risk - Geographic Risk (Details)

v3.22.4
Concentrations of Risk - Geographic Risk (Details) - Mortgage Loans Customer - Mortgage Loans Benchmark - Credit Concentration Risk
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Residential Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 100.00% 100.00%
Residential Mortgage | Minimum    
Concentration Risk [Line Items]    
Concentration risk percentage 5.00%  
Residential Mortgage | Agency    
Concentration Risk [Line Items]    
Concentration risk percentage 56.00% 97.00%
Residential Mortgage | Non-agency    
Concentration Risk [Line Items]    
Concentration risk percentage 44.00% 3.00%
Reverse Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 100.00% 100.00%
Reverse Mortgage | Minimum    
Concentration Risk [Line Items]    
Concentration risk percentage 5.00%  
Reverse Mortgage | Agency    
Concentration Risk [Line Items]    
Concentration risk percentage 64.00% 70.00%
Reverse Mortgage | Non-agency    
Concentration Risk [Line Items]    
Concentration risk percentage 36.00% 30.00%
Non-Agency Reverse Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 100.00% 100.00%
Non-Agency Reverse Mortgage | Minimum    
Concentration Risk [Line Items]    
Concentration risk percentage 5.00%  
Nonperforming HECM buyouts    
Concentration Risk [Line Items]    
Concentration risk percentage 100.00% 100.00%
Nonperforming HECM buyouts | Minimum    
Concentration Risk [Line Items]    
Concentration risk percentage 5.00%  
Commercial Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 100.00% 100.00%
Commercial Mortgage | Minimum    
Concentration Risk [Line Items]    
Concentration risk percentage 5.00%  
California | Residential Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 44.00% 43.00%
California | Reverse Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 47.00% 45.00%
California | Non-Agency Reverse Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 77.00% 81.00%
California | Nonperforming HECM buyouts    
Concentration Risk [Line Items]    
Concentration risk percentage 9.00% 10.00%
California | Commercial Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 4.00% 5.00%
Washington | Residential Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 2.00% 8.00%
Oregon | Residential Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 3.00% 6.00%
Arizona | Residential Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 4.00% 5.00%
New Jersey | Residential Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 6.00% 5.00%
New Jersey | Commercial Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 8.00% 7.00%
Other | Residential Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 41.00% 33.00%
Other | Reverse Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 37.00% 37.00%
Other | Non-Agency Reverse Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 23.00% 19.00%
Other | Nonperforming HECM buyouts    
Concentration Risk [Line Items]    
Concentration risk percentage 42.00% 42.00%
Other | Commercial Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 64.00% 66.00%
New York | Reverse Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 7.00% 8.00%
New York | Nonperforming HECM buyouts    
Concentration Risk [Line Items]    
Concentration risk percentage 20.00% 17.00%
Florida | Reverse Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 5.00% 5.00%
Florida | Nonperforming HECM buyouts    
Concentration Risk [Line Items]    
Concentration risk percentage 5.00% 6.00%
Florida | Commercial Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 7.00% 6.00%
Texas | Reverse Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 4.00% 5.00%
Texas | Nonperforming HECM buyouts    
Concentration Risk [Line Items]    
Concentration risk percentage 10.00% 10.00%
Texas | Commercial Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 4.00% 5.00%
Puerto Rico | Nonperforming HECM buyouts    
Concentration Risk [Line Items]    
Concentration risk percentage 14.00% 15.00%
Illinois | Commercial Mortgage    
Concentration Risk [Line Items]    
Concentration risk percentage 13.00% 11.00%