Quarterly report pursuant to Section 13 or 15(d)

Commitment and Contingencies (Details)

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Commitment and Contingencies (Details) - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2024
Dec. 31, 2023
Equal or greater than    
Commitments and Contingencies [Line Items]    
Outstanding principal balance of HECM is equal to or greater than MCA (in percent) 98.00%  
Outstanding principal balance is equal to or greater than MCA (in percent) 98.00%  
Loan origination commitments    
Commitments and Contingencies [Line Items]    
Long-term purchase commitment $ 1.9 $ 4.7
HECM loans    
Commitments and Contingencies [Line Items]    
Unfunded loan commitments 4,600.0 4,500.0
Commercial mortgage loans    
Commitments and Contingencies [Line Items]    
Unfunded loan commitments $ 6.8 $ 21.4