FAIR VALUE (Valuation Techniques) (Details) $ in Thousands	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Consolidated Funds
Assets, Fair Value Disclosure [Abstract]
Equity securities	$ 45,881	$ 112,384
Partnership interests	312,636	296,012
Collateralized loan obligations	9,228,687	7,973,748
Other fixed income	9,647,115	8,319,551
Derivative instruments	1,599
Total derivative assets, at fair value	10,007,231	8,728,614
Liabilities, Fair Value Disclosure [Abstract]
Derivatives instruments		(4,776)
Total liabilities, at fair value	(9,228,884)	(7,978,524)
Consolidated Funds \| Level III
Assets, Fair Value Disclosure [Abstract]
Equity securities	42,259	85,988
Partnership interests	312,636	296,012
Collateralized loan obligations	0	0
Other fixed income	586,287	339,136
Derivative instruments	1,599
Total derivative assets, at fair value	942,781	721,136
Liabilities, Fair Value Disclosure [Abstract]
Derivatives instruments		(4,106)
Total liabilities, at fair value	(197)	(4,106)
Consolidated Funds \| Level III \| Transaction price
Assets, Fair Value Disclosure [Abstract]
Equity securities	2,000	44,812
Consolidated Funds \| Level III \| Other
Assets, Fair Value Disclosure [Abstract]
Equity securities	$ 40,096	$ 40,745
Consolidated Funds \| Level III \| Other \| Net income multiple
Unobservable Input
Equity securities	27.5	36.2
Consolidated Funds \| Level III \| Other \| Net income multiple \| Weighted Average
Unobservable Input
Equity securities	27.5	36.2
Consolidated Funds \| Level III \| Other \| Illiquidity discount
Unobservable Input
Equity securities	0.250	0.250
Consolidated Funds \| Level III \| Other \| Illiquidity discount \| Weighted Average
Unobservable Input
Equity securities	0.250	0.250
Consolidated Funds \| Level III \| Broker quotes and/or 3rd party pricing services
Assets, Fair Value Disclosure [Abstract]
Equity securities	$ 27
Other fixed income	493,686	$ 271,919
Derivative instruments	1,599
Liabilities, Fair Value Disclosure [Abstract]
Derivatives instruments	(197)	(4,106)
Consolidated Funds \| Level III \| Discounted cash flow
Assets, Fair Value Disclosure [Abstract]
Partnership interests	$ 312,636	$ 296,012
Consolidated Funds \| Level III \| Discounted cash flow \| Discount rate
Unobservable Input
Partnership interest	0.161	0.196
Consolidated Funds \| Level III \| Discounted cash flow \| Discount rate \| Weighted Average
Unobservable Input
Partnership interest	0.161	0.196
Consolidated Funds \| Level III \| Market approach
Assets, Fair Value Disclosure [Abstract]
Equity securities	$ 136	$ 431
Other fixed income	$ 1,846
Consolidated Funds \| Level III \| Market approach \| EBITDA multiple
Unobservable Input
Fixed income securities	7.8
Consolidated Funds \| Level III \| Market approach \| EBITDA multiple \| Minimum
Unobservable Input
Equity securities	5.4	8.2
Consolidated Funds \| Level III \| Market approach \| EBITDA multiple \| Maximum
Unobservable Input
Equity securities	18.0	21.3
Consolidated Funds \| Level III \| Market approach \| EBITDA multiple \| Weighted Average
Unobservable Input
Equity securities	8.8	16.1
Fixed income securities	7.8
Consolidated Funds \| Level III \| Income approach
Assets, Fair Value Disclosure [Abstract]
Other fixed income	$ 90,755	$ 67,217
Consolidated Funds \| Level III \| Income approach \| Yield \| Minimum
Unobservable Input
Fixed income securities	0.028	0.048
Consolidated Funds \| Level III \| Income approach \| Yield \| Maximum
Unobservable Input
Fixed income securities	0.369	0.143
Consolidated Funds \| Level III \| Income approach \| Yield \| Weighted Average
Unobservable Input
Fixed income securities	0.082	0.097
Ares Management L.P
Assets, Fair Value Disclosure [Abstract]
Equity securities	$ 15,636	$ 15,747
Partnership interests	5,607	36,824
Total derivative assets, at fair value	93,317	125,777
Liabilities, Fair Value Disclosure [Abstract]
Derivatives instruments		(113)
Total liabilities, at fair value	(128)	(113)
Ares Management L.P \| Level III
Assets, Fair Value Disclosure [Abstract]
Equity securities	14,704	14,704
Partnership interests	2,575	35,192
Total derivative assets, at fair value	84,634	119,079
Liabilities, Fair Value Disclosure [Abstract]
Derivatives instruments		0
Total liabilities, at fair value	0	0
Ares Management L.P \| Level III \| Transaction price
Assets, Fair Value Disclosure [Abstract]
Equity securities	14,704	14,704
Partnership interests		32,661
Ares Management L.P \| Level III \| Other
Assets, Fair Value Disclosure [Abstract]
Partnership interests	2,575	2,531
Other fixed income	48,220	46,918
Ares Management L.P \| Level III \| Broker quotes and/or 3rd party pricing services
Assets, Fair Value Disclosure [Abstract]
Collateralized loan obligations	$ 19,135	$ 22,265

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 probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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