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Commitments - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Other Commitments [Line Items]      
Funded amount in connection with reverse mortgage loans $ 246.1 $ 226.6  
Threshold percentage of outstanding principal balance on maximum claim amount 98.00%    
Weighted average remaining lease term (years) 4 years 3 months 18 days    
Restricted cash $ 43.9 60.7 $ 52.3
Weighted average discount rate (percent) 8.70%    
Operating lease cost $ 8.3 8.8 14.6
Variable lease cost 1.0 1.6 1.6
Floating Rate Reverse Mortgage Loans      
Other Commitments [Line Items]      
Additional borrowing capacity to borrowers 1,800.0 1,500.0 $ 2,000.0
Forward Mortgage Loan Interest Rate Lock Commitments      
Other Commitments [Line Items]      
Short-term commitments to lend 540.1    
Reverse Loans IRLCs      
Other Commitments [Line Items]      
Short-term commitments to lend $ 13.8    
NRZ | Unpaid Principal Balance | Customer Concentration Risk      
Other Commitments [Line Items]      
Concentration risk (percentage) 17.00%    
NRZ | Loan Count | Customer Concentration Risk      
Other Commitments [Line Items]      
Concentration risk (percentage) 28.00%    
NRZ | Delinquent Loans | Customer Concentration Risk      
Other Commitments [Line Items]      
Concentration risk (percentage) 68.00%    
MAV Asset Vehicle LLC | Unpaid Principal Balance | Customer Concentration Risk      
Other Commitments [Line Items]      
Concentration risk (percentage) 17.00%    
MAV Asset Vehicle LLC | Loan Count | Customer Concentration Risk      
Other Commitments [Line Items]      
Concentration risk (percentage) 12.00%    
Leased Facility      
Other Commitments [Line Items]      
Restricted cash $ 2.8 $ 23.2  
Cost of Property Repairs and Maintenance $ 2.9