FAIR VALUE MEASUREMENTS - Fair Value Levels (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
||||||
|---|---|---|---|---|---|---|---|---|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | $ 2,216,776 | [1] | $ 2,185,948 | [2] | ||||
| Cash equivalents | 33,012 | [1] | 47,217 | |||||
| Money Market Fund, Fair Value Disclosure | 13,900 | 23,676 | ||||||
| Level 1 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 0 | 0 | ||||||
| Cash equivalents | 33,012 | 47,217 | ||||||
| Money Market Fund, Fair Value Disclosure | 13,900 | 23,676 | ||||||
| Level 2 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 9,129 | 37,308 | ||||||
| Cash equivalents | 0 | 0 | ||||||
| Money Market Fund, Fair Value Disclosure | 0 | 0 | ||||||
| Level 3 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 2,207,647 | 2,148,640 | ||||||
| Cash equivalents | 0 | 0 | ||||||
| Money Market Fund, Fair Value Disclosure | 0 | 0 | ||||||
| First Lien Debt | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 2,168,231 | 2,141,391 | ||||||
| First Lien Debt | Level 1 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 0 | 0 | ||||||
| First Lien Debt | Level 2 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 5,800 | 33,242 | ||||||
| First Lien Debt | Level 3 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 2,162,431 | 2,108,149 | ||||||
| Second Lien Debt | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 10,775 | 17,401 | ||||||
| Second Lien Debt | Level 1 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 0 | 0 | ||||||
| Second Lien Debt | Level 2 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 3,329 | 4,066 | ||||||
| Second Lien Debt | Level 3 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 7,446 | 13,335 | ||||||
| Other Debt Investments | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 5,059 | 8,029 | ||||||
| Other Debt Investments | Level 1 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 0 | 0 | ||||||
| Other Debt Investments | Level 2 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 0 | 0 | ||||||
| Other Debt Investments | Level 3 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 5,059 | 8,029 | ||||||
| Equity | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 32,711 | 19,127 | ||||||
| Equity | Level 1 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 0 | 0 | ||||||
| Equity | Level 2 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | 0 | 0 | ||||||
| Equity | Level 3 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Fair Value | $ 32,711 | $ 19,127 | ||||||
| ||||||||