v3.26.3
Fair Value of Financial Instruments - Fair Value of Level 3 Investments at Fair Value and Significant Unobservable Inputs Used in Valuations (Parenthetical) (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Equity investment $ 192,200 $ 172,582
Joint venture investments 79,990  
Level 3    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Equity investment 179,990 133,397
Joint venture investments 79,990  
First-lien Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Debt investments 2,950,384 2,984,501
First-lien Debt Investments | Level 3    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Debt investments 2,933,775 2,956,297
Second-lien Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Debt investments 24,898 30,678
Second-lien Debt Investments | Level 3    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Debt investments 24,893 30,456
Mezzanine Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Debt investments 63,966 61,684
Mezzanine Debt Investments | Level 3    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Debt investments 63,966 61,684
Asset Valuation Waterfall | First-lien Debt Investments | Level 3    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Debt investments 92,400 105,900
Asset Valuation Waterfall | Second-lien Debt Investments | Level 3    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Debt investments 100 100
Asset Valuation Waterfall | Equity Investments | Level 3    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Equity investment $ 35,300  
Asset Valuation Waterfall | Equity and Other Investments | Level 3    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Equity investment   13,100
Discounted Cash Flow Model | Equity and Other Investments | Level 3    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Equity investment   $ 20,100