v3.26.1
Fair Value Measurements - Schedule of Significant Unobservable Inputs of Level 3 Investments (Detail) - Level 3 [Member]
$ in Thousands
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 655,446 $ 452,442
Income Approach [Member | Discount Rate [Member] | First Lien Debt Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 372,886 259,231
Income Approach [Member | Discount Rate [Member] | Second Lien Debt Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 81,330 $ 88,220
Income Approach [Member | Discount Rate [Member] | Unsecured and Subordinated debt investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 75,549  
Income Approach [Member | Discount Rate [Member] | Preferred Equity Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 56,801  
Income Approach [Member | Discount Rate [Member] | Minimum [Member] | First Lien Debt Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input 0.084 [1] 0.083 [2]
Income Approach [Member | Discount Rate [Member] | Minimum [Member] | Second Lien Debt Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input 0.099 [1] 0.095 [2]
Income Approach [Member | Discount Rate [Member] | Minimum [Member] | Unsecured and Subordinated debt investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input [1] 0.126  
Income Approach [Member | Discount Rate [Member] | Minimum [Member] | Preferred Equity Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input [1] 0.12  
Income Approach [Member | Discount Rate [Member] | Maximum [Member] | First Lien Debt Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input 0.097 [1] 0.094 [2]
Income Approach [Member | Discount Rate [Member] | Maximum [Member] | Second Lien Debt Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input 0.141 [1] 0.105 [2]
Income Approach [Member | Discount Rate [Member] | Maximum [Member] | Unsecured and Subordinated debt investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input [1] 0.126  
Income Approach [Member | Discount Rate [Member] | Maximum [Member] | Preferred Equity Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input [1] 0.12  
Income Approach [Member | Discount Rate [Member] | Weighted Average [Member] | First Lien Debt Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input 0.092 [1] 0.088 [2]
Income Approach [Member | Discount Rate [Member] | Weighted Average [Member] | Second Lien Debt Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input 0.121 [1] 0.101 [2]
Income Approach [Member | Discount Rate [Member] | Weighted Average [Member] | Unsecured and Subordinated debt investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input [1] 0.126  
Income Approach [Member | Discount Rate [Member] | Weighted Average [Member] | Preferred Equity Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input [1] 0.12  
Recent Transaction [Member] | Transaction Price [Member] | First Lien Debt Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 68,880 $ 49,823
Recent Transaction [Member] | Transaction Price [Member] | Preferred Equity Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 55,168
Recent Transaction [Member] | Transaction Price [Member] | Minimum [Member] | First Lien Debt Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input 0.985 [1] 0.99 [2]
Recent Transaction [Member] | Transaction Price [Member] | Minimum [Member] | Preferred Equity Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input [2]   0.98
Recent Transaction [Member] | Transaction Price [Member] | Maximum [Member] | First Lien Debt Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input 0.995 [1] 0.995 [2]
Recent Transaction [Member] | Transaction Price [Member] | Maximum [Member] | Preferred Equity Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input [2]   0.98
Recent Transaction [Member] | Transaction Price [Member] | Weighted Average [Member] | First Lien Debt Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input 0.987 [1] 0.993 [2]
Recent Transaction [Member] | Transaction Price [Member] | Weighted Average [Member] | Preferred Equity Investments [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Alternative Investment, Measurement Input [2]   0.98
[1] The weighted average is calculated by weighing the significant unobservable input by the relative fair value of each investment in the category.
[2] The weighted average is calculated by weighing the significant unobservable input by the relative fair value of each investment in the category.