v3.26.3
Investments at Fair Value - Summary of Investments at Fair Value (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] $ 3,407,640 $ 3,323,282
Fair Value 3,393,035 3,347,317
Net Unrealized Gain (Loss) (14,605) 24,035
First-lien Debt Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 2,976,755 2,934,162
Fair Value 2,950,384 2,984,501
Net Unrealized Gain (Loss) (26,371) 50,339
Second-lien Debt Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 25,552 69,631
Fair Value 24,898 30,678
Net Unrealized Gain (Loss) (654) (38,953)
Mezzanine Debt Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 63,582 61,150
Fair Value 63,966 61,684
Net Unrealized Gain (Loss) 384 534
Equity Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 181,220 159,782
Fair Value 192,200 172,582
Net Unrealized Gain (Loss) 10,980 12,800
Structured Credit Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 84,890 98,557
Fair Value 81,597 97,872
Net Unrealized Gain (Loss) (3,293) $ (685)
Joint Venture Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 75,641  
Fair Value 79,990  
Net Unrealized Gain (Loss) $ 4,349  
[1] The amortized cost represents the original cost adjusted for the amortization of discounts or premiums, as applicable, on debt investments using the effective interest method.