v3.26.3
Fair Value Measurements - Fair Value Hierarchy of Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total $ 12,946,234 $ 14,207,294
First lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 12,408,691 13,866,434
Second lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 252,721 231,650
Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 12,498 12,278
Equity    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 272,324 96,932
Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 0 438
Level 1 | First lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 0 0
Level 1 | Second lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 0 0
Level 1 | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 0 0
Level 1 | Equity    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 0 438
Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 77,889 106,617
Level 2 | First lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 77,889 106,617
Level 2 | Second lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 0 0
Level 2 | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 0 0
Level 2 | Equity    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 0 0
Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 12,868,345 14,100,239
Level 3 | First lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 12,330,802 13,759,817
Level 3 | Second lien debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 252,721 231,650
Level 3 | Unsecured debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total 12,498 12,278
Level 3 | Equity    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total $ 272,324 $ 96,494