Quarterly report [Sections 13 or 15(d)]

FAIR VALUE MEASUREMENTS - Schedule of Investments Valued Using NAV Per Share (Details)

v3.25.1
FAIR VALUE MEASUREMENTS - Schedule of Investments Valued Using NAV Per Share (Details) - Measured at NAV - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Accrued performance allocations $ 327,150 $ 339,560
Partnership interests 162,035 168,545
Unfunded Commitments 15,753 16,251
Company-sponsored open-end fund    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Partnership interests 28,110 29,147
Unfunded Commitments 0 0
Company-sponsored closed-end funds    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Partnership interests 118,145 124,034
Unfunded Commitments 8,671 9,994
Third-party closed-end funds    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Partnership interests 15,780 15,364
Unfunded Commitments $ 7,082 $ 6,257