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FAIR VALUE - Schedule of Investments and Other Financial Instruments of Consolidated Funds by Fair-Value Hierarchy Level (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total derivatives | $ 44,051 | $ 33,349
Total derivatives | (70,865) | (13,385)
Consolidated Funds |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 4,847,399 | 4,946,862
Total derivatives | 44,051 | 33,349
Total derivatives | (70,865) | (13,385)
Consolidated Funds | Options and futures |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total derivatives | (160) | (4,853)
Consolidated Funds | Fair Value, Measurements, Recurring |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 4,847,399 | 4,946,862
Total derivatives | 44,051 | 33,349
Total assets | 4,891,450 | 4,980,211
Total derivatives | (70,865) | (13,385)
Total liabilities | (70,865) | (13,385)
Consolidated Funds | Fair Value, Measurements, Recurring | Foreign-currency forward contracts |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total derivatives | 26,724 | 17,578
Total derivatives | (70,705) | (8,513)
Consolidated Funds | Fair Value, Measurements, Recurring | Swaps |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total derivatives | 17,327 | 15,771
Total derivatives | 0 | (19)
Consolidated Funds | Fair Value, Measurements, Recurring | Options and futures |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total derivatives | (160) | (4,853)
Consolidated Funds | Fair Value, Measurements, Recurring | Corporate debt – bank debt |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 1,710,970 | 2,218,233
Consolidated Funds | Fair Value, Measurements, Recurring | Corporate debt – all other |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 264,686 | 465,474
Consolidated Funds | Fair Value, Measurements, Recurring | Equities – common stock |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 1,774,356 | 1,448,983
Consolidated Funds | Fair Value, Measurements, Recurring | Equities – preferred stock |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 767,652 | 607,991
Consolidated Funds | Fair Value, Measurements, Recurring | Real estate |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 329,735 | 206,181
Consolidated Funds | Level I | Fair Value, Measurements, Recurring |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 211,640 | 224,520
Total derivatives | 3,559 | 0
Total assets | 215,199 | 224,520
Total derivatives | (6,982) | 0
Total liabilities | (6,982) | 0
Consolidated Funds | Level I | Fair Value, Measurements, Recurring | Foreign-currency forward contracts |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total derivatives | 3,559 | 0
Total derivatives | (6,982) | 0
Consolidated Funds | Level I | Fair Value, Measurements, Recurring | Swaps |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total derivatives | 0 | 0
Total derivatives | 0 | 0
Consolidated Funds | Level I | Fair Value, Measurements, Recurring | Options and futures |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total derivatives | 0 | 0
Consolidated Funds | Level I | Fair Value, Measurements, Recurring | Corporate debt – bank debt |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 0 | 0
Consolidated Funds | Level I | Fair Value, Measurements, Recurring | Corporate debt – all other |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 0 | 0
Consolidated Funds | Level I | Fair Value, Measurements, Recurring | Equities – common stock |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 209,439 | 222,670
Consolidated Funds | Level I | Fair Value, Measurements, Recurring | Equities – preferred stock |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 2,201 | 1,850
Consolidated Funds | Level I | Fair Value, Measurements, Recurring | Real estate |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 0 | 0
Consolidated Funds | Level II | Fair Value, Measurements, Recurring |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 394,127 | 675,130
Total derivatives | 24,023 | 17,578
Total assets | 418,150 | 692,708
Total derivatives | (63,883) | (13,385)
Total liabilities | (63,883) | (13,385)
Consolidated Funds | Level II | Fair Value, Measurements, Recurring | Foreign-currency forward contracts |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total derivatives | 23,165 | 17,578
Total derivatives | (63,723) | (8,513)
Consolidated Funds | Level II | Fair Value, Measurements, Recurring | Swaps |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total derivatives | 858 | 0
Total derivatives | 0 | (19)
Consolidated Funds | Level II | Fair Value, Measurements, Recurring | Options and futures |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total derivatives | (160) | (4,853)
Consolidated Funds | Level II | Fair Value, Measurements, Recurring | Corporate debt – bank debt |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 111,310 | 281,918
Consolidated Funds | Level II | Fair Value, Measurements, Recurring | Corporate debt – all other |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 183,264 | 353,922
Consolidated Funds | Level II | Fair Value, Measurements, Recurring | Equities – common stock |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 99,553 | 39,290
Consolidated Funds | Level II | Fair Value, Measurements, Recurring | Equities – preferred stock |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 0 | 0
Consolidated Funds | Level II | Fair Value, Measurements, Recurring | Real estate |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 0 | 0
Consolidated Funds | Level III |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 4,258,101 | 4,062,983
Consolidated Funds | Level III | Fair Value, Measurements, Recurring |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 4,241,632 | 4,047,212
Total derivatives | 16,469 | 15,771
Total assets | 4,258,101 | 4,062,983
Total derivatives | 0 | 0
Total liabilities | 0 | 0
Consolidated Funds | Level III | Fair Value, Measurements, Recurring | Foreign-currency forward contracts |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total derivatives | 0 | 0
Total derivatives | 0 | 0
Consolidated Funds | Level III | Fair Value, Measurements, Recurring | Swaps |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total derivatives | 16,469 | 15,771
Total derivatives | 0 | 0
Consolidated Funds | Level III | Fair Value, Measurements, Recurring | Options and futures |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total derivatives | 0 | 0
Consolidated Funds | Level III | Fair Value, Measurements, Recurring | Corporate debt – bank debt |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 1,599,660 | 1,936,315
Consolidated Funds | Level III | Fair Value, Measurements, Recurring | Corporate debt – all other |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 81,422 | 111,552
Consolidated Funds | Level III | Fair Value, Measurements, Recurring | Equities – common stock |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 1,465,364 | 1,187,023
Consolidated Funds | Level III | Fair Value, Measurements, Recurring | Equities – preferred stock |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | 765,451 | 606,141
Consolidated Funds | Level III | Fair Value, Measurements, Recurring | Real estate |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Total investments | $ 329,735 | $ 206,181

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- Definition Fair value portion of asset recognized for present right to economic benefit. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. 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