v3.26.3
Fair Value of Financial Instruments - Summary of Significant Unobservable Inputs Used to Measure The Fair Value Of The Level 3 Portfolio Investments (Details) - Significant Unobservable Inputs (Level 3)
$ in Thousands
Sep. 30, 2026
USD ($)
yr
Dec. 31, 2025
USD ($)
yr
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Level 3 Investments $ 2,740,078 $ 2,386,232
Debt investments | Discounted Cash Flows | Hypothetical Market Yield    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Level 3 Investments $ 1,886,646 $ 1,682,044
Debt investments | Discounted Cash Flows | Minimum | Hypothetical Market Yield    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.059 0.038
Debt investments | Discounted Cash Flows | Maximum | Hypothetical Market Yield    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.249 0.365
Debt investments | Discounted Cash Flows | Weighted Average | Hypothetical Market Yield    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.135 0.142
Debt investments | Cost approximates fair value    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Level 3 Investments $ 511,559 $ 442,889
Debt investments | Scenario Analysis | Probability Weighting of Alternative Outcomes    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Level 3 Investments $ 17,185 $ 39,888
Debt investments | Scenario Analysis | Minimum | Probability Weighting of Alternative Outcomes    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.20 0.10
Debt investments | Scenario Analysis | Maximum | Probability Weighting of Alternative Outcomes    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.80 0.85
Debt investments | Enterprise Value    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Level 3 Investments $ 27,557 $ 12,885
Debt investments | Enterprise Value | Minimum | Performance Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.008  
Debt investments | Enterprise Value | Maximum | Performance Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.028  
Debt investments | Enterprise Value | Weighted Average | Performance Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.013  
Debt investments | Transaction Precedent    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Level 3 Investments   22,258
Equity investments | Discounted Cash Flows | Hypothetical Market Yield    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Level 3 Investments $ 27,450  
Equity investments | Discounted Cash Flows | Minimum | Hypothetical Market Yield    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.171  
Equity investments | Discounted Cash Flows | Maximum | Hypothetical Market Yield    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.223  
Equity investments | Discounted Cash Flows | Weighted Average | Hypothetical Market Yield    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range | yr 18.4  
Equity investments | Cost approximates fair value    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Level 3 Investments $ 10,145 26,300
Equity investments | Market Approach | Revenue Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Level 3 Investments   $ 82,042
Equity investments | Market Approach | Performance Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Level 3 Investments $ 133,135  
Equity investments | Market Approach | Minimum | Revenue Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range   0.003
Equity investments | Market Approach | Minimum | Performance Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.005  
Equity investments | Market Approach | Minimum | Volatility    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.408 0.402
Equity investments | Market Approach | Minimum | Risk-Free Interest Rate    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 4.6 3.5
Equity investments | Market Approach | Minimum | Estimated Time to Exit (in years)    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range | yr 1.3 0.5
Equity investments | Market Approach | Maximum | Revenue Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range   0.475
Equity investments | Market Approach | Maximum | Performance Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.537  
Equity investments | Market Approach | Maximum | Volatility    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 1.038 1.056
Equity investments | Market Approach | Maximum | Risk-Free Interest Rate    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 5.1 3.6
Equity investments | Market Approach | Maximum | Estimated Time to Exit (in years)    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range | yr 4.3 3.8
Equity investments | Market Approach | Weighted Average | Revenue Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range   0.041
Equity investments | Market Approach | Weighted Average | Performance Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.048  
Equity investments | Market Approach | Weighted Average | Volatility    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.583 0.534
Equity investments | Market Approach | Weighted Average | Risk-Free Interest Rate    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 4.9 3.5
Equity investments | Market Approach | Weighted Average | Estimated Time to Exit (in years)    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range | yr 2.4 2.4
Warrants | Market Approach | Revenue Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Level 3 Investments   $ 74,533
Warrants | Market Approach | Performance Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Level 3 Investments $ 77,108  
Warrants | Market Approach | Minimum | Revenue Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range   0.001
Warrants | Market Approach | Minimum | Performance Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.003  
Warrants | Market Approach | Minimum | Volatility    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.411 0.355
Warrants | Market Approach | Minimum | Risk-Free Interest Rate    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 4.5 3.5
Warrants | Market Approach | Minimum | Estimated Time to Exit (in years)    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range | yr 1 1
Warrants | Market Approach | Maximum | Revenue Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range   0.475
Warrants | Market Approach | Maximum | Performance Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.537  
Warrants | Market Approach | Maximum | Volatility    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 1.368 1.409
Warrants | Market Approach | Maximum | Risk-Free Interest Rate    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 5.1 3.9
Warrants | Market Approach | Maximum | Estimated Time to Exit (in years)    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range | yr 4.3 4.5
Warrants | Market Approach | Weighted Average | Revenue Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range   0.104
Warrants | Market Approach | Weighted Average | Performance Multiple    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.101  
Warrants | Market Approach | Weighted Average | Volatility    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.64 0.599
Warrants | Market Approach | Weighted Average | Risk-Free Interest Rate    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 4.9 3.5
Warrants | Market Approach | Weighted Average | Estimated Time to Exit (in years)    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range | yr 2.4 2.4
Warrants | Transaction Precedent | Transaction Price    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Level 3 Investments $ 45,188  
Warrants | Black Scholes | Volatility    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Level 3 Investments $ 4,105 $ 3,393
Warrants | Black Scholes | Minimum | Volatility    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.658 61.2
Warrants | Black Scholes | Minimum | Risk-Free Interest Rate    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.05 0.037
Warrants | Black Scholes | Minimum | Estimated Time to Exit (in years)    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.031 0.047
Warrants | Black Scholes | Maximum | Volatility    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 1.213 128
Warrants | Black Scholes | Maximum | Risk-Free Interest Rate    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.053 0.042
Warrants | Black Scholes | Maximum | Estimated Time to Exit (in years)    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.089 0.098
Warrants | Black Scholes | Weighted Average | Volatility    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.992 0.904
Warrants | Black Scholes | Weighted Average | Risk-Free Interest Rate    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.05 0.04
Warrants | Black Scholes | Weighted Average | Estimated Time to Exit (in years)    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Range 0.04 0.078