INVESTMENTS (Fair Value Investments, excluding Equity Method Investments Held at Fair Value) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Investments
Equity method investments		$ 1,663,664
Ares Management L.P
Investments
Equity method investments	$ 1,190,604
Partnership interests	4,207	36,824
Total equity method investments	85,128	121,754
Collateralized loan obligations (2)	17,783	22,265
Equity securities	$ 15,577	$ 15,747
Percentage of total investments as of	1.50%	1.30%
Ares Management L.P \| Crestline Denali Class B Interests
Investments
Collateralized loan obligations (2)	$ 2,600
Partnership interests \| Ares Management L.P
Investments
Total equity method investments	$ 1,124,387	$ 1,593,438
Percentage of total investments as of	94.40%	95.80%
Other fixed income \| Ares Management L.P
Investments
Total equity method investments	$ 47,561	$ 46,918
Percentage of total investments as of	4.00%	2.80%
Investments in CLO warehouse \| Ares Management L.P
Investments
Collateralized loan obligations (2)	$ 65,344	$ 69,183
Percentage of total investments as of	5.50%	4.10%
Common Stock \| Ares Management L.P
Investments
Equity securities	$ 873	$ 1,043
Percentage of total investments as of	0.10%	0.10%
Partnership interests \| Ares Management L.P
Investments
Equity method investments	$ 345,350	$ 390,407
Percentage of total investments as of	29.00%	23.50%
Carried interest allocation \| Ares Management L.P
Investments
Equity method investments	$ 747,363	$ 1,134,967
Percentage of total investments as of	62.80%	68.20%
Equity method private investment partnership interests and other (held at fair value) \| Ares Management L.P
Investments
Equity method investments	$ 18,911	$ 51,528
Percentage of total investments as of	1.60%	3.10%
Equity method private investment partnership interests and other \| Ares Management L.P
Investments
Partnership interests	$ 12,763	$ 16,536
Percentage of total investments as of	1.00%	1.00%

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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.

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Fair value portion of investments accounted under the equity method.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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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.

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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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