Quarterly report pursuant to Section 13 or 15(d)

Concentrations of Risk - Summary of Reverse Mortgages (Detail)

v3.21.2
Concentrations of Risk - Summary of Reverse Mortgages (Detail) - Credit Concentration Risk - Reverse Mortgage
6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Concentration Risk [Line Items]    
Concentration Risk, Percentage 100.00% 100.00%
California    
Concentration Risk [Line Items]    
Concentration Risk, Percentage 44.00% 44.00%
New York    
Concentration Risk [Line Items]    
Concentration Risk, Percentage 8.00% 8.00%
Florida    
Concentration Risk [Line Items]    
Concentration Risk, Percentage 5.00% 5.00%
Texas    
Concentration Risk [Line Items]    
Concentration Risk, Percentage 5.00% 5.00%
Other    
Concentration Risk [Line Items]    
Concentration Risk, Percentage 38.00% 38.00%