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
Jun. 30, 2024
Dec. 31, 2023
Liabilities:    
General Partner Notes Payable $ 416,046 $ 423,263
Level 1    
Liabilities:    
General Partner Notes Payable 0 0
Level 2    
Liabilities:    
General Partner Notes Payable 0 0
Level 3    
Liabilities:    
General Partner Notes Payable 416,046 423,263
Measured at NAV    
Assets:    
Accrued performance allocations 338,855 381,993
Partnership interests 172,581 191,635
Fair Value, Recurring    
Assets:    
Accrued performance allocations 338,855 381,993
Partnership interests 172,581 191,635
Other investments 12,325 12,026
Total assets at fair value 545,832 605,492
Liabilities:    
General Partner Notes Payable 3,133 3,355
Fair Value, Recurring | Common shares in publicly traded company    
Assets:    
Marketable securities 101 135
Fair Value, Recurring | Exchange traded funds    
Assets:    
Marketable securities 2,750 2,843
Fair Value, Recurring | Mutual funds    
Assets:    
Marketable securities 19,220 16,860
Fair Value, Recurring | Level 1    
Assets:    
Accrued performance allocations 0 0
Partnership interests 0 0
Other investments 0 0
Total assets at fair value 22,071 19,838
Liabilities:    
General Partner Notes Payable 0 0
Fair Value, Recurring | Level 1 | Common shares in publicly traded company    
Assets:    
Marketable securities 101 135
Fair Value, Recurring | Level 1 | Exchange traded funds    
Assets:    
Marketable securities 2,750 2,843
Fair Value, Recurring | Level 1 | Mutual funds    
Assets:    
Marketable securities 19,220 16,860
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 0 0
Fair Value, Recurring | Level 2 | Common shares in publicly traded company    
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 12,325 12,026
Total assets at fair value 12,325 12,026
Liabilities:    
General Partner Notes Payable 0 0
Fair Value, Recurring | Level 3 | Common shares in publicly traded company    
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 338,855 381,993
Partnership interests 172,581 191,635
Other investments 0 0
Total assets at fair value 511,436 573,628
Liabilities:    
General Partner Notes Payable 3,133 3,355
Fair Value, Recurring | Measured at NAV | Common shares in publicly traded company    
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