Annual report [Section 13 and 15(d), not S-K Item 405]

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
Dec. 31, 2024
Dec. 31, 2023
Liabilities:    
General Partner Notes Payable, at fair value $ 418,347 $ 423,263
Level 1    
Liabilities:    
General Partner Notes Payable, at fair value 0 0
Level 2    
Liabilities:    
General Partner Notes Payable, at fair value 0 0
Level 3    
Liabilities:    
General Partner Notes Payable, at fair value 418,347 423,263
Measured at NAV    
Assets:    
Accrued performance allocations 339,560 381,993
Partnership interests 168,545 191,635
Fair Value, Recurring    
Assets:    
Accrued performance allocations 339,560 381,993
Partnership interests 168,545 191,635
Other investments 12,615 12,026
Total assets at fair value 541,839 605,492
Liabilities:    
General Partner Notes Payable, at fair value 2,782 3,355
Fair Value, Recurring | Equity Securities    
Assets:    
Marketable securities 73 135
Fair Value, Recurring | Exchange traded funds    
Assets:    
Marketable securities 3,157 2,843
Fair Value, Recurring | Mutual funds    
Assets:    
Marketable securities 17,889 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 21,119 19,838
Liabilities:    
General Partner Notes Payable, at fair value 0 0
Fair Value, Recurring | Level 1 | Equity Securities    
Assets:    
Marketable securities 73 135
Fair Value, Recurring | Level 1 | Exchange traded funds    
Assets:    
Marketable securities 3,157 2,843
Fair Value, Recurring | Level 1 | Mutual funds    
Assets:    
Marketable securities 17,889 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, 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 12,615 12,026
Total assets at fair value 12,615 12,026
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 339,560 381,993
Partnership interests 168,545 191,635
Other investments 0 0
Total assets at fair value 508,105 573,628
Liabilities:    
General Partner Notes Payable, at fair value 2,782 3,355
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