v3.26.3
Borrowings - Schedule of Mortgage Loan Warehouse and MSR Financing Facilities (Details) - USD ($)
$ in Millions
 1 Months Ended 9 Months Ended
Jul. 31, 2026
Sep. 30, 2026
Oct. 31, 2026
Aug. 31, 2026
Aug. 30, 2026
Jun. 30, 2026
May 31, 2026
May 01, 2026
Apr. 30, 2026
Jan. 31, 2026
Dec. 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   5.22%                 5.24%
Prepaid lender fees, net   $ 1.2                 $ 1.1
Secured Debt                      
Line of Credit Facility [Line Items]                      
Debt Instrument, Remaining Borrowing Capacity, Uncommited Amount   201.3                  
Debt Instrument, Remaining Borrowing Capacity, Committed Amount   183.2                  
Total Financing liabilities   1,700.6                 1,285.2
Unamortized debt issuance costs   (0.7)                 0.0
Outstanding borrowings (MSR financing facilities, net)   $ 1,699.9                 $ 1,285.2
Weighted average interest rate   6.58%                 6.70%
Secured Debt | Securitization Notes                      
Line of Credit Facility [Line Items]                      
Total Financing liabilities   $ 1,802.0                 $ 951.9
Unamortized debt issuance costs   (102.6)                 (52.6)
Outstanding borrowings (MSR financing facilities, net)   1,699.4                 899.3
MSR financing facilities                      
Line of Credit Facility [Line Items]                      
Available borrowing capacity   27.8                  
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   $ 0.0                 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   101.1                  
Total Financing liabilities   298.9                 633.1
Maximum borrowing capacity   400.0         $ 400.0 $ 750.0      
Ginnie Mae Mortgage Servicing Rights Financing Facility | Secured Debt                      
Line of Credit Facility [Line Items]                      
Debt Instrument, Remaining Borrowing Capacity, Uncommited Amount   98.0                  
Debt Instrument, Remaining Borrowing Capacity, Committed Amount   0.0                  
Total Financing liabilities   477.0                 371.4
Uncommitted available borrowing capacity   575.0     $ 575.0       $ 500.0 $ 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     $ 650.0                
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   15.1                 18.5
Agency MSR Financing Facility Revolving Loan                      
Line of Credit Facility [Line Items]                      
Prepaid lender fees, net   3.9                 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   82.1                  
Total Financing liabilities   317.9                 194.5
Maximum borrowing capacity   400.0         400.0   250.0    
OLIT Asset-Backed Notes, Series 2024-HB2 | Secured Debt | Securitization Notes                      
Line of Credit Facility [Line Items]                      
Total Financing liabilities   $ 178.4                 193.8
Interest rate (as a percent)   5.00%                  
Debt instrument, face amount $ 17.2 $ 347.8                  
70 Million PLS MSR Financing Facility | Secured Debt                      
Line of Credit Facility [Line Items]                      
Debt Instrument, Remaining Borrowing Capacity, Uncommited Amount   3.2                  
Debt Instrument, Remaining Borrowing Capacity, Committed Amount   0.0                  
Total Financing liabilities   66.8                 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   $ 165.6                 194.7
Debt instrument, face amount 14.5 337.1                  
OLIT Asset-Backed Notes, Series 2024-HB1 | Secured Debt | Securitization Notes                      
Line of Credit Facility [Line Items]                      
Total Financing liabilities   100.2                 116.1
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   269.5                 370.8
Debt instrument, face amount   413.3                  
Total Financing Agreements | Secured Debt                      
Line of Credit Facility [Line Items]                      
Available borrowing capacity   330.7                  
Uncommitted available borrowing capacity   2,524.6                  
Short-Term Debt   1,430.1                 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   355.0                 0.0
Debt instrument, face amount   533.9                  
OLIT Asset-Backed Notes, Series 2026-HB2 | Secured Debt | Securitization Notes                      
Line of Credit Facility [Line Items]                      
Total Financing liabilities   370.6                 0.0
Debt instrument, face amount   499.9                  
OLIT Asset-Backed Notes, Series 2026-HB3 | Secured Debt | Securitization Notes                      
Line of Credit Facility [Line Items]                      
Total Financing liabilities   362.7                 0.0
Debt instrument, face amount   504.6                  
$500 million Fannie Mae MSR financing facility | Secured Debt                      
Line of Credit Facility [Line Items]                      
Debt Instrument, Remaining Borrowing Capacity, Uncommited Amount   100.1                  
Debt Instrument, Remaining Borrowing Capacity, Committed Amount   0.0                  
Total Financing liabilities   274.9                 0.0
Maximum borrowing capacity   375.0   $ 375.0   $ 500.0 $ 450.0        
Repayments of lines of credit 250.0                    
Fannie Mae Mortgage Servicing Rights Term Loan Facility $250 Million | Secured Debt                      
Line of Credit Facility [Line Items]                      
Maximum borrowing capacity $ 250.0                    
OLIT Asset-Backed Notes, Series 2026-HB1 | Secured Debt | Securitization Notes                      
Line of Credit Facility [Line Items]                      
Debt instrument, face amount                 $ 22.0    
$250 million Fannie Mae MSR term loan 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   0.0                  
Total Financing liabilities   250.0                 $ 0.0
Maximum borrowing capacity   $ 250.0