FAIR VALUE - Schedule of Investments Using NAV per Share (Details) - Consolidated Funds - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
FAIR VALUE
Investments (held at fair value)	$ 1,721,331	$ 1,642,489
Investments Measured at NAV
FAIR VALUE
Investments (held at fair value)	1,721,331	1,642,489
Investments Measured at NAV \| Non-core investments
FAIR VALUE
Investments (held at fair value)	1,721,331	1,642,489
Unfunded commitments	$ 1,079,881	$ 738,621

Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 35
-Paragraph 54B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482134/820-10-35-54B

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-6A

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
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-Subparagraph (c)
-Publisher FASB
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