v3.26.1
FAIR VALUE MEASUREMENTS - Schedule of Valuation Techniques and Significant Unobservable Inputs Used in Level 3 Fair Value Measurements of Assets (Details) - Level 3
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value $ 2,794,922,000 $ 1,689,143,000
First-Lien Debt | Yield Method    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value $ 2,563,598,000 $ 1,541,771,000
First-Lien Debt | Yield Method | Low | Market Yield Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0685 0.0671
First-Lien Debt | Yield Method | High | Market Yield Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1790 0.1725
First-Lien Debt | Yield Method | Weighted Average | Market Yield Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0949 0.0893
First-Lien Debt | Market Approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value $ 33,719,000 $ 26,503,000
First-Lien Debt | Market Approach | Low | EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 7.5 7.25
First-Lien Debt | Market Approach | High | EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 13 10.5
First-Lien Debt | Market Approach | Weighted Average | EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 11.14 9.39
First-Lien Debt | Market Approach, Revenue Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value $ 8,680,000 $ 4,807,000
First-Lien Debt | Market Approach, Revenue Multiple | Low | Revenue Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.3 0.33
First-Lien Debt | Market Approach, Revenue Multiple | High | Revenue Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.65 0.5
First-Lien Debt | Market Approach, Revenue Multiple | Weighted Average | Revenue Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.54 0.46
First-Lien Debt | Recent Transactions    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments valued using recent transactions $ 92,339,000 $ 165,769,000
Subordinated Debt | Yield Method    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value $ 152,036,000 $ 98,529,000
Subordinated Debt | Yield Method | Low | Market Yield Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1092 0.1204
Subordinated Debt | Yield Method | High | Market Yield Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.2525 0.2650
Subordinated Debt | Yield Method | Weighted Average | Market Yield Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1490 0.1576
Subordinated Debt | Recent Transactions    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments valued using recent transactions $ 980,000 $ 9,254,000
Equity Investments | Yield Method    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value $ 736,000 $ 789,000
Equity Investments | Yield Method | Low | Market Yield Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0890 0.0863
Equity Investments | Yield Method | High | Market Yield Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1516 0.1501
Equity Investments | Yield Method | Weighted Average | Market Yield Discount Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1395 0.1355
Equity Investments | Market Approach    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value $ 36,153,000 $ 16,744,000
Equity Investments | Market Approach | Low | EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 6.75 5.5
Equity Investments | Market Approach | High | EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 20.25 19.5
Equity Investments | Market Approach | Weighted Average | EBITDA Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 13.37 11.94
Equity Investments | Market Approach, Revenue Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair value $ 0 $ 0
Equity Investments | Market Approach, Revenue Multiple | Low | Revenue Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.3 0.33
Equity Investments | Market Approach, Revenue Multiple | High | Revenue Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.48 0.5
Equity Investments | Market Approach, Revenue Multiple | Weighted Average | Revenue Multiple    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0 0
Equity Investments | Recent Transactions    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments valued using recent transactions $ 3,592,000 $ 2,048,000