v3.26.3
Senior Debt - Schedule of Senior Debt (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Debt Instrument [Line Items]    
Long-term debt, gross $ 351,453 $ 321,353
Line of Credit    
Debt Instrument [Line Items]    
Borrowing Capacity 550,000  
Long-term debt, gross 351,453 321,353
Less: unamortized original issue discount and debt issuance costs 1,814 0
Total 349,639 321,353
Line of Credit | Revolving Credit Facility    
Debt Instrument [Line Items]    
Borrowing Capacity 450,000  
Long-term debt, gross $ 276,453 321,353
Line of Credit | Revolving Credit Facility | Revolving Line Of Credit, Tranche C, Maturing February 2029, Opportunity Funding SPE V, LLC    
Debt Instrument [Line Items]    
Borrower Opportunity Funding SPE V, LLC (Tranche C)  
Borrowing Capacity $ 62,500  
Long-term debt, gross $ 46,875 46,875
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]  
Basis spread on variable rate 7.30%  
Maturity Date February 2029  
Line of Credit | Revolving Credit Facility | Revolving Line Of Credit, Tranche D, Maturing February 2029, Opportunity Funding SPE V, LLC    
Debt Instrument [Line Items]    
Borrower Opportunity Funding SPE V, LLC (Tranche D)  
Borrowing Capacity $ 237,500  
Long-term debt, gross $ 150,578 132,125
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]  
Basis spread on variable rate 7.30%  
Maturity Date February 2029  
Line of Credit | Revolving Credit Facility | Revolving Line Of Credit, Maturing September 2029, Opportunity Funding SPE IX, LLC    
Debt Instrument [Line Items]    
Borrower Opportunity Funding SPE IX, LLC  
Borrowing Capacity $ 150,000  
Long-term debt, gross $ 79,000 79,000
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]  
Basis spread on variable rate 6.00%  
Maturity Date September 2029  
Line of Credit | Revolving Credit Facility | Revolving Line Of Credit, Maturing October 2026, Gray Rock SPV LLC    
Debt Instrument [Line Items]    
Borrower Gray Rock SPV LLC  
Borrowing Capacity $ 0  
Long-term debt, gross $ 0 63,353
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]  
Basis spread on variable rate 7.45%  
Maturity Date October 2026  
Line of Credit | Secured Debt | Term loan    
Debt Instrument [Line Items]    
Borrower Opportunity Funding SPE Residual, LLC  
Borrowing Capacity $ 100,000  
Long-term debt, gross $ 75,000 $ 0
Basis spread on variable rate 12.50%  
Maturity Date September 2030