v3.26.1
Fair Value Measurement - Summary of Significant Unobservable Inputs of the Company's Level 3 Financial Instruments (Detail) - Fair Value, Inputs, Level 3 [Member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 2,958,691 $ 1,541,927
Subordinated Notes [Member] | Annual Prepayment Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input Annual Prepayment Rate  
Range 20.00  
Subordinated Notes [Member] | Annual Prepayment Rate [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Weighted Average [1] 20.00  
Subordinated Notes [Member] | Reinvestment Spread [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input Reinvestment Spread  
Subordinated Notes [Member] | Reinvestment Spread [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 3.20  
Subordinated Notes [Member] | Reinvestment Spread [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 5.05  
Subordinated Notes [Member] | Reinvestment Spread [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Weighted Average [1] 4.18  
Subordinated Notes [Member] | Reinvestment Price [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input Reinvestment Price  
Subordinated Notes [Member] | Reinvestment Price [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 99.00  
Subordinated Notes [Member] | Reinvestment Price [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 99.50  
Subordinated Notes [Member] | Reinvestment Price [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Weighted Average [1] 99.23  
Subordinated Notes [Member] | Recovery Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input Recovery Rate  
Range 65.00  
Subordinated Notes [Member] | Recovery Rate [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Weighted Average [1] 65.00  
Subordinated Notes [Member] | Expected Yield [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable Input Expected Yield  
Subordinated Notes [Member] | Expected Yield [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 11.00  
Subordinated Notes [Member] | Expected Yield [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 20.50  
Subordinated Notes [Member] | Expected Yield [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Weighted Average [1] 15.98  
Yield Method [Member] | First Lien Senior Secured Debt [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 2,797,561 $ 1,393,652
Unobservable Input Market Yield Discount Spreads Market Yield Discount Spreads
Yield Method [Member] | First Lien Senior Secured Debt [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 3.37 3.26
Yield Method [Member] | First Lien Senior Secured Debt [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 27.84 15.14
Yield Method [Member] | First Lien Senior Secured Debt [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range [2]   6.05
Weighted Average [1] 5.77  
Yield Method [Member] | Second Lien Senior Secured [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 5,460 $ 4,467
Unobservable Input Market Yield Discount Spreads Market Yield Discount Spreads
Yield Method [Member] | Second Lien Senior Secured [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 5.18 5.15
Yield Method [Member] | Second Lien Senior Secured [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 6.18 6.29
Yield Method [Member] | Second Lien Senior Secured [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range [2]   5.72
Weighted Average [1] 5.68  
Yield Method [Member] | Subordinated Notes [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 16,580  
Unobservable Input Market Yield Discount Spreads  
Range 15.00  
Yield Method [Member] | Subordinated Notes [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Weighted Average [1] 15.00  
Recent Transaction [Member] | First Lien Senior Secured Debt [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 102,299 $ 138,814
Unobservable Input Transaction Price Transaction Price
Recent Transaction [Member] | First Lien Senior Secured Debt [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 98.00 98.00
Recent Transaction [Member] | First Lien Senior Secured Debt [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 100.00 101.00
Recent Transaction [Member] | First Lien Senior Secured Debt [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range [2]   98.95
Weighted Average [1] 98.93  
Recent Transaction [Member] | CLO [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range   87.37
Weighted Average [2]   87.37
Cost Plus Excess Spread Method [Member] | CLO [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 4,994
Unobservable Input   Transaction Price
MarketApproach [Member] | First Lien Senior Secured Debt [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 3,554  
Unobservable Input Market Multiple  
MarketApproach [Member] | First Lien Senior Secured Debt [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 0.3  
MarketApproach [Member] | First Lien Senior Secured Debt [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 10.9  
MarketApproach [Member] | First Lien Senior Secured Debt [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Weighted Average [1] 5.6  
MarketApproach [Member] | Preferred Equity [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 499  
Unobservable Input Market Multiple  
MarketApproach [Member] | Preferred Equity [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 0.3  
MarketApproach [Member] | Preferred Equity [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 10.9  
MarketApproach [Member] | Preferred Equity [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Weighted Average [1] 5.6  
Discounted Cash Flows [Member] | Subordinated Notes [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 32,738  
Unobservable Input Annual Default Rate  
Discounted Cash Flows [Member] | Subordinated Notes [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 2.00  
Discounted Cash Flows [Member] | Subordinated Notes [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 3.00  
Discounted Cash Flows [Member] | Subordinated Notes [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range 2.54  
[1] Weighted average is calculated by weighing the significant unobservable input by the relative fair value of each investment in the category.
[2] Weighted average is calculated by weighing the significant unobservable input by the relative fair value of each investment in the category.