INVESTMENTS - Investments of the Consolidated Funds (Details) - Consolidated Funds - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Investments
Total investments, at fair value	$ 11,361,019	$ 10,877,097
Percent of total assets	5.00%	5.00%
Percentage of interest yield	0.06%
Fixed income investments:
Investments
Total investments, at fair value	$ 10,852,660	$ 10,410,442
Percentage of total investments	95.60%	95.70%
Fixed income investments: \| Bonds
Investments
Total investments, at fair value	$ 434,226	$ 397,494
Percentage of total investments	3.90%	3.60%
Fixed income investments: \| Loans
Investments
Total investments, at fair value	$ 9,389,769	$ 10,012,948
Percentage of total investments	82.60%	92.10%
Fixed income investments: \| U.S. Treasury securities
Investments
Total investments, at fair value	$ 1,000,165	$ 0
Percentage of total investments	8.80%	0.00%
Fixed income investments: \| Investments in CLO warehouse
Investments
Total investments, at fair value	$ 28,500	$ 0
Percentage of total investments	0.30%	0.00%
Equity securities
Investments
Total investments, at fair value	$ 264,202	$ 227,031
Percentage of total investments	2.30%	2.10%
Partnership interests
Investments
Total investments, at fair value	$ 244,157	$ 239,624
Percentage of total investments	2.10%	2.20%

Fixed Income Securities, Percentage Of Interest Yield

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Percent by which the fair value of a single issuer or investment exceeds the entity's total consolidated net assets. This is used as a threshold for a count of such issuers or investments at balance sheet date.

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- Definition

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Percent of net assets at close of period. For schedules of investments that are categorized, each category has a percent of net assets for the aggregated value of the Investments in the category.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-12B(Column D))
-URI http://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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