v3.25.1
Business Segment Reporting - Schedule of Segment Reporting Information (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Results of Operations       
Servicing and subservicing fees $ 203.3 $ 204.5  
Gain on reverse loans held for investment and HMBS-related borrowings, net 23.8 15.4  
Gain on loans held for sale, net 11.8 10.9  
Other revenue, net 10.9 8.3  
Revenue 249.8 239.1  
MSR valuation adjustments, net (38.9) (11.6)  
Compensation and benefits 57.4 53.6  
Servicing and origination 13.0 15.0  
Technology and communications 15.0 12.7  
Professional Fees, Net   12.0  
Professional Fees 22.6    
Occupancy, equipment and mailing 8.2 7.7  
Corporate Overhead Allocations 0.0 0.0  
Other expenses 3.6 3.4  
Operating expenses 119.9 104.4  
Other income (expense):      
Interest income 26.2 17.5  
Interest expense (67.0) (67.4)  
Pledged MSR liability expense (41.9) (44.8)  
Earnings of equity method investee 0.0 2.7  
Gain on extinguishment of debt 0.0 1.4  
Other, net 0.9 (0.7)  
Other income (expense), net (81.9) (91.3)  
Income (loss) before income taxes 9.1 31.8  
Total Assets      
Total Assets 16,259.3   $ 16,435.4
Operating Segments | Servicing      
Results of Operations       
Servicing and subservicing fees 203.3 204.2  
Gain on reverse loans held for investment and HMBS-related borrowings, net 16.9 8.6  
Gain on loans held for sale, net (3.8) 1.8  
Other revenue, net 4.8 4.5  
Revenue 221.2 219.1  
MSR valuation adjustments, net (41.9) (12.5)  
Compensation and benefits 23.1 25.3  
Servicing and origination 11.7 13.3  
Technology and communications 7.4 6.1  
Professional Fees, Net   7.1  
Professional Fees 6.3    
Occupancy, equipment and mailing 7.1 6.8  
Corporate Overhead Allocations 12.4 10.9  
Other expenses 0.5 1.1  
Operating expenses 68.6 70.6  
Other income (expense):      
Interest income 11.8 6.7  
Interest expense (47.9) (45.8)  
Pledged MSR liability expense (41.9) (44.9)  
Earnings of equity method investee   2.7  
Gain on extinguishment of debt   0.0  
Other, net 0.5 (0.5)  
Other income (expense), net (77.5) (81.8)  
Income (loss) before income taxes 33.1 54.2  
Total Assets      
Total Assets 15,013.1   15,242.5
Operating Segments | Originations      
Results of Operations       
Servicing and subservicing fees 0.0 0.3  
Gain on reverse loans held for investment and HMBS-related borrowings, net 6.9 6.8  
Gain on loans held for sale, net 15.6 9.1  
Other revenue, net 6.2 3.8  
Revenue 28.6 20.0  
MSR valuation adjustments, net 3.0 0.9  
Compensation and benefits 12.4 10.2  
Servicing and origination 1.1 1.4  
Technology and communications 2.1 1.7  
Professional Fees, Net   0.3  
Professional Fees 0.5    
Occupancy, equipment and mailing 0.7 0.5  
Corporate Overhead Allocations 3.9 3.9  
Other expenses 1.5 1.0  
Operating expenses 22.2 19.0  
Other income (expense):      
Interest income 13.3 9.7  
Interest expense (12.7) (10.4)  
Pledged MSR liability expense 0.0 0.0  
Earnings of equity method investee   0.0  
Gain on extinguishment of debt   0.0  
Other, net (0.4) (0.1)  
Other income (expense), net 0.2 (0.8)  
Income (loss) before income taxes 9.6 1.1  
Total Assets      
Total Assets 1,009.6   945.0
Operating Segments | Corporate      
Results of Operations       
Servicing and subservicing fees 0.0 0.0  
Gain on reverse loans held for investment and HMBS-related borrowings, net 0.0 0.0  
Gain on loans held for sale, net 0.0 0.0  
Other revenue, net 0.0 0.0  
Revenue 0.0 0.0  
MSR valuation adjustments, net 0.0 0.0  
Compensation and benefits 21.9 18.1  
Servicing and origination 0.2 0.3  
Technology and communications 5.5 4.9  
Professional Fees, Net   4.6  
Professional Fees 15.9    
Occupancy, equipment and mailing 0.4 0.4  
Corporate Overhead Allocations (16.4) (14.8)  
Other expenses 1.6 1.3  
Operating expenses 29.1 14.8  
Other income (expense):      
Interest income 1.1 1.1  
Interest expense (6.4) (11.2)  
Pledged MSR liability expense 0.0 0.0  
Earnings of equity method investee   0.0  
Gain on extinguishment of debt   1.4  
Other, net 0.8 0.0  
Other income (expense), net (4.5) (8.6)  
Income (loss) before income taxes (33.6) $ (23.4)  
Total Assets      
Total Assets $ 236.6   $ 247.9