v3.26.1
Investments at Fair Value - Summary of Investments at Fair Value (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] $ 3,324,332 $ 3,323,282
Fair Value 3,313,441 3,347,317
Net Unrealized Gain (Loss) (10,891) 24,035
First-lien Debt Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 2,963,245 2,934,162
Fair Value 2,959,032 2,984,501
Net Unrealized Gain (Loss) (4,213) 50,339
Second-lien Debt Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 31,369 69,631
Fair Value 31,195 30,678
Net Unrealized Gain (Loss) (174) (38,953)
Mezzanine Debt Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 62,852 61,150
Fair Value 63,752 61,684
Net Unrealized Gain (Loss) 900 534
Equity Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 153,647  
Fair Value 150,992  
Net Unrealized Gain (Loss) (2,655)  
Equity and Other Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1]   159,782
Fair Value   172,582
Net Unrealized Gain (Loss)   12,800
Structured Credit Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 98,554 98,557
Fair Value 93,805 97,872
Net Unrealized Gain (Loss) (4,749) $ (685)
Joint Venture Investments    
Schedule Of Available For Sale Securities [Line Items]    
Amortized Cost [1] 14,665  
Fair Value $ 14,665  
[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.