v3.26.3
Fair Value of Financial Instruments - Net Change in Unrealized Gains or Losses on Investments for Which Level 3 Inputs were Used in Determining Fair Value (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]          
Net Unrealized Gain (Loss)     $ (14,605)   $ 24,035
Level 3          
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]          
Net Unrealized Gain (Loss) $ 2,700 $ (3,418) (54,328) $ 15,976  
Level 3 | First-lien Debt Investments          
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]          
Net Unrealized Gain (Loss) (10,611) (6,123) (69,306) 20,648  
Level 3 | Second-lien Debt Investments          
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]          
Net Unrealized Gain (Loss) 166 (724) (1,002) (4,544)  
Level 3 | Mezzanine Debt Investments          
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]          
Net Unrealized Gain (Loss) 749 (925) (69) (1,441)  
Level 3 | Equity Investments          
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]          
Net Unrealized Gain (Loss) 9,286 $ 4,354 11,700 $ 1,313  
Level 3 | Joint Venture Investments          
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]          
Net Unrealized Gain (Loss) $ 3,110   $ 4,349