v3.26.1
Investments at Fair Value - Summary of Investments at Fair Value (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] $ 8,612,475 $ 7,892,866
Fair Value 8,653,350 8,108,654
Net Unrealized Gain (Loss) 40,875 215,788
First-lien Debt Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 8,161,814 7,483,884
Fair Value 8,182,766 7,659,912
Net Unrealized Gain (Loss) 20,952 176,028
Second-lien Debt Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 38,342 35,279
Fair Value 38,581 37,383
Net Unrealized Gain (Loss) 239 2,104
Mezzanine Debt Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 228,106 215,194
Fair Value 230,594 222,366
Net Unrealized Gain (Loss) 2,488 7,172
Equity Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 158,509 158,509
Fair Value 174,484 188,993
Net Unrealized Gain (Loss) 15,975 $ 30,484
Joint Venture Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 25,704  
Fair Value 26,925  
Net Unrealized Gain (Loss) $ 1,221  
[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.