v3.25.4
FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of Fair Value of Investments (Details) - USD ($)
Dec. 31, 2025
Dec. 31, 2024
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents $ 3,120,386,000 $ 339,136,000
Interest rate swap contracts (asset) 9,358,000 10,414,000
Interest rate swap contracts (liability) (6,274,000) (824,000)
Total 3,123,817,000 348,726,000
Common equity    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 2,168,096,000  
Other equity    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 354,399,000  
First lien senior secured loans    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 508,273,000  
Senior subordinated loans    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 89,618,000  
Money market funds    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 347,000  
Level 1    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents   0
Interest rate swap contracts (asset) 0 0
Interest rate swap contracts (liability) 0 0
Total 347,000 0
Level 1 | Common equity    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 0  
Level 1 | Other equity    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 0  
Level 1 | First lien senior secured loans    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 0  
Level 1 | Senior subordinated loans    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 0  
Level 1 | Money market funds    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 347,000  
Level 2    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents   0
Interest rate swap contracts (asset) 9,358,000 10,414,000
Interest rate swap contracts (liability) (6,274,000) (824,000)
Total 345,988,000 9,590,000
Level 2 | Common equity    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 0  
Level 2 | Other equity    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 0  
Level 2 | First lien senior secured loans    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 342,904,000  
Level 2 | Senior subordinated loans    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 0  
Level 2 | Money market funds    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 0  
Level 3    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 2,777,482,000 339,136,000
Interest rate swap contracts (asset) 0 0
Interest rate swap contracts (liability) 0 0
Total 2,777,482,000 $ 339,136,000
Level 3 | Common equity    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 2,168,096,000  
Level 3 | Other equity    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 354,399,000  
Level 3 | First lien senior secured loans    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents 165,369,000  
Level 3 | Senior subordinated loans    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Investments and cash equivalents $ 89,618,000