v3.26.1
Borrowings - Schedule of Mortgage Loan Warehouse and MSR Financing Facilities (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Apr. 30, 2026
Jan. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Feb. 25, 2025
Jan. 31, 2025
Line of Credit Facility [Line Items]              
Percentage Of The Limited Liability Company Interest 100.00%            
Mortgage warehouse facilities              
Line of Credit Facility [Line Items]              
Weighted average interest rate 5.09%     5.24%      
Prepaid lender fees, net $ 1.1     $ 1.1      
Secured Debt              
Line of Credit Facility [Line Items]              
Debt Instrument, Remaining Borrowing Capacity, Uncommited Amount 74.1            
Debt Instrument, Remaining Borrowing Capacity, Committed Amount 92.2            
Total Financing liabilities $ 1,371.0     $ 1,285.2      
Weighted average interest rate 6.53%     6.70%      
Secured Debt | Securitization Notes              
Line of Credit Facility [Line Items]              
Total Financing liabilities $ 1,389.7     $ 951.9      
Unamortized debt issuance costs (68.7)     (52.6)      
Outstanding borrowings (MSR financing facilities, net) 1,321.0     899.3      
MSR financing facilities              
Line of Credit Facility [Line Items]              
Available borrowing capacity 49.9            
Mortgage Warehouse Agreement              
Line of Credit Facility [Line Items]              
Available borrowing capacity 0.0            
OLIT 2023 Notes | Secured Debt | Securitization Notes              
Line of Credit Facility [Line Items]              
Total Financing liabilities $ 67.3     76.5      
Interest rate (as a percent) 3.00%            
Debt instrument, face amount $ 264.9            
Agency Mortgage Servicing Rights Financing Facility | Secured Debt              
Line of Credit Facility [Line Items]              
Debt Instrument, Remaining Borrowing Capacity, Uncommited Amount 0.0            
Debt Instrument, Remaining Borrowing Capacity, Committed Amount 89.9            
Total Financing liabilities 660.1     633.1      
Maximum borrowing capacity         $ 750.0    
Ginnie Mae Mortgage Servicing Rights Financing Facility | Secured Debt              
Line of Credit Facility [Line Items]              
Debt Instrument, Remaining Borrowing Capacity, Uncommited Amount 25.5            
Debt Instrument, Remaining Borrowing Capacity, Committed Amount 0.0            
Total Financing liabilities 424.5     371.4      
Uncommitted available borrowing capacity     $ 450.0 400.0      
Ginnie Mae Mortgage Servicing Rights Financing Facility | Secured Debt | Subsequent Event              
Line of Credit Facility [Line Items]              
Uncommitted available borrowing capacity   $ 500.0          
OASIS Series 2014-1 | Secured Debt              
Line of Credit Facility [Line Items]              
Debt Instrument, Remaining Borrowing Capacity, Uncommited Amount 0.0            
Debt Instrument, Remaining Borrowing Capacity, Committed Amount 0.0            
Total Financing liabilities 17.3     18.5      
Agency MSR Financing Facility Revolving Loan              
Line of Credit Facility [Line Items]              
Prepaid lender fees, net 1.9     1.5      
Agency MSR Financing Facility Revolving Loan | Secured Debt              
Line of Credit Facility [Line Items]              
Debt Instrument, Remaining Borrowing Capacity, Uncommited Amount 0.0            
Debt Instrument, Remaining Borrowing Capacity, Committed Amount 2.3            
Total Financing liabilities 247.7     194.5      
Maximum borrowing capacity             $ 250.0
OLIT Asset-Backed Notes, Series 2024-HB2 | Secured Debt | Securitization Notes              
Line of Credit Facility [Line Items]              
Total Financing liabilities $ 183.4     193.8      
Interest rate (as a percent) 5.00%            
Debt instrument, face amount $ 330.6            
70 Million PLS MSR Financing Facility | Secured Debt              
Line of Credit Facility [Line Items]              
Debt Instrument, Remaining Borrowing Capacity, Uncommited Amount 48.5            
Debt Instrument, Remaining Borrowing Capacity, Committed Amount 0.0            
Total Financing liabilities $ 21.5     67.8      
Uncommitted available borrowing capacity           $ 70.0  
OLIT 2023-HB1, OLIT 2024-HB1 and OLIT 2024-HB2 | Secured Debt              
Line of Credit Facility [Line Items]              
Debt Instrument, Mandatory Call Period 3 years            
Debt Instruent, Redemption Percentage Of Premium 1.00%            
OLIT Asset-Backed Notes, Series 2025-HB1 | Secured Debt | Securitization Notes              
Line of Credit Facility [Line Items]              
Total Financing liabilities $ 178.8     194.7      
Interest rate (as a percent) 3.00%            
Debt instrument, face amount $ 322.5            
OLIT Asset-Backed Notes, Series 2024-HB1 | Secured Debt | Securitization Notes              
Line of Credit Facility [Line Items]              
Total Financing liabilities $ 111.4     116.1      
Interest rate (as a percent) 3.00%            
Debt instrument, face amount $ 268.6            
OLIT Asset-Backed Notes, Series 2025-HB2 | Secured Debt | Securitization Notes              
Line of Credit Facility [Line Items]              
Total Financing liabilities $ 337.0     370.8      
Interest rate (as a percent) 3.00%            
Debt instrument, face amount $ 413.3            
Total Financing Agreements | Secured Debt              
Line of Credit Facility [Line Items]              
Available borrowing capacity 312.5            
Uncommitted available borrowing capacity 1,589.5            
Short-Term Debt 2,193.0     1,224.6      
OLIT Asset-Backed Notes, Series 2026-HB1 | March 2039 | Secured Debt | Securitization Notes              
Line of Credit Facility [Line Items]              
Total Financing liabilities $ 511.9     $ 0.0      
Interest rate (as a percent) 3.00%            
Debt instrument, face amount $ 511.9