v3.25.4
Fair Value Measurement - Summary of Assets Categorized Within Fair Value Hierarchy (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt instrument at fair value $ 1,659,319 $ 2,171,728
Debt investments, Fair Value 1,534,345 [1] 2,087,081 [2]
1st Lien/Senior Secured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 1,468,487 1,992,547
1st Lien/Last-Out Unitranche    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 29,474 22,642
2nd Lien/Senior Secured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 2,526 3,587
Unsecured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 6,654 14,969
Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 23,007 34,482
Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 3,974 18,475
Warrants    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 223 379
Investments in Affiliated Money Market Fund    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 124,974 84,647
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 124,974 84,647
Level 1 | Investments in Affiliated Money Market Fund    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 124,974 84,647
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value   15,864
Level 2 | 1st Lien/Senior Secured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value   15,864
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 1,534,345 2,071,217
Level 3 | 1st Lien/Senior Secured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 1,468,487 1,976,683
Level 3 | 1st Lien/Last-Out Unitranche    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 29,474 22,642
Level 3 | 2nd Lien/Senior Secured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 2,526 3,587
Level 3 | Unsecured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 6,654 14,969
Level 3 | Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 23,007 34,482
Level 3 | Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value 3,974 18,475
Level 3 | Warrants    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt investments, Fair Value $ 223 $ 379
[1] For Industry subtotal and percentage, see Note 4 "Investments."
[2] For Industry subtotal and percentage, see Note 4 "Investments."