v3.25.4
Borrowings - Schedule of Borrowings (Detail) - Senior debt, net - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Borrowing Capacity $ 525,000  
Long-term debt 321,353 $ 318,758
Revolving Credit Facility    
Debt Instrument [Line Items]    
Borrowing Capacity 525,000  
Long-term debt $ 321,353 288,828
Revolving Line Of Credit, Tranche B, Maturing June 2026, Opportunity Funding SPE V, LLC    
Debt Instrument [Line Items]    
Borrower Opportunity Funding SPE V, LLC (Tranche B)  
Borrowing Capacity $ 0  
Long-term debt $ 0 84,500
Basis spread on variable rate (in percent) 6.75%  
Date June 2026  
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]  
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 $ 46,875 62,500
Basis spread on variable rate (in percent) 7.75%  
Date February 2029  
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]  
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 $ 132,125 0
Basis spread on variable rate (in percent) 7.30%  
Date February 2029  
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]  
Revolving Line Of Credit, Maturing December 2026, Opportunity Funding SPE IX, LLC    
Debt Instrument [Line Items]    
Borrower Opportunity Funding SPE IX, LLC  
Borrowing Capacity $ 0  
Long-term debt $ 0 85,871
Basis spread on variable rate (in percent) 7.50%  
Date December 2026  
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]  
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 $ 79,000 0
Basis spread on variable rate (in percent) 6.00%  
Date September 2029  
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]  
Revolving Line Of Credit, Maturing October 2026, Gray Rock SPV LLC    
Debt Instrument [Line Items]    
Borrower Gray Rock SPV LLC  
Borrowing Capacity $ 75,000  
Long-term debt $ 63,353 55,957
Basis spread on variable rate (in percent) 7.45%  
Date October 2026  
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]  
Term loan, net    
Debt Instrument [Line Items]    
Borrower OppFi-LLC  
Borrowing Capacity $ 0  
Long-term debt $ 0 $ 29,930
Date September 2025  
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]  
Term loan, net | Variable Component One    
Debt Instrument [Line Items]    
Basis spread on variable rate (in percent) 0.11%  
Term loan, net | Variable Component Two    
Debt Instrument [Line Items]    
Basis spread on variable rate (in percent) 10.00%