Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details)

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FAIR VALUE MEASUREMENTS - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Liabilities:    
General Partner Notes Payable, at fair value $ 4,165 $ 8,633
Measured at NAV    
Assets:    
Accrued performance allocations 377,474 554,723
Partnership interests 192,211 77,087
Fair Value, Recurring    
Assets:    
Accrued performance allocations 377,474 554,723
Partnership interests 192,211 77,087
Other investments 8,272 8,369
Total assets at fair value 590,757 654,793
Liabilities:    
General Partner Notes Payable, at fair value 4,165 8,633
Fair Value, Recurring | Equity Securities    
Assets:    
Marketable securities 110 86
Fair Value, Recurring | Exchange traded funds    
Assets:    
Marketable securities 1,864 2,117
Fair Value, Recurring | Mutual funds    
Assets:    
Marketable securities 10,826 12,411
Fair Value, Recurring | Level 1    
Assets:    
Accrued performance allocations 0 0
Partnership interests 0 0
Other investments 0 0
Total assets at fair value 12,800 14,614
Liabilities:    
General Partner Notes Payable, at fair value 0 0
Fair Value, Recurring | Level 1 | Equity Securities    
Assets:    
Marketable securities 110 86
Fair Value, Recurring | Level 1 | Exchange traded funds    
Assets:    
Marketable securities 1,864 2,117
Fair Value, Recurring | Level 1 | Mutual funds    
Assets:    
Marketable securities 10,826 12,411
Fair Value, Recurring | Level 2    
Assets:    
Accrued performance allocations 0 0
Partnership interests 0 0
Other investments 0 0
Total assets at fair value 0 0
Liabilities:    
General Partner Notes Payable, at fair value 0 0
Fair Value, Recurring | Level 2 | Equity Securities    
Assets:    
Marketable securities 0 0
Fair Value, Recurring | Level 2 | Exchange traded funds    
Assets:    
Marketable securities 0 0
Fair Value, Recurring | Level 2 | Mutual funds    
Assets:    
Marketable securities 0 0
Fair Value, Recurring | Level 3    
Assets:    
Accrued performance allocations 0 0
Partnership interests 0 0
Other investments 8,272 8,369
Total assets at fair value 8,272 8,369
Liabilities:    
General Partner Notes Payable, at fair value 0 0
Fair Value, Recurring | Level 3 | Equity Securities    
Assets:    
Marketable securities 0 0
Fair Value, Recurring | Level 3 | Exchange traded funds    
Assets:    
Marketable securities 0 0
Fair Value, Recurring | Level 3 | Mutual funds    
Assets:    
Marketable securities 0 0
Fair Value, Recurring | Measured at NAV    
Assets:    
Accrued performance allocations 377,474 554,723
Partnership interests 192,211 77,087
Other investments 0 0
Total assets at fair value 569,685 631,810
Liabilities:    
General Partner Notes Payable, at fair value 4,165 8,633
Fair Value, Recurring | Measured at NAV | Equity Securities    
Assets:    
Marketable securities 0 0
Fair Value, Recurring | Measured at NAV | Exchange traded funds    
Assets:    
Marketable securities 0 0
Fair Value, Recurring | Measured at NAV | Mutual funds    
Assets:    
Marketable securities $ 0 $ 0