FAIR VALUE (Valuation Techniques) (Details) $ in Thousands	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Consolidated Funds
Assets, Fair Value Disclosure [Abstract]
Equity securities	$ 53,730	$ 112,384
Partnership interests	307,025	296,012
Collateralized loan obligations	8,354,458	7,973,748
Other fixed income	8,733,810	8,319,551
Total derivative assets, at fair value	9,095,396	8,728,614
Liabilities, Fair Value Disclosure [Abstract]
Derivatives instruments		(4,776)
Total liabilities, at fair value	(8,355,269)	(7,978,524)
Consolidated Funds \| Level III
Assets, Fair Value Disclosure [Abstract]
Equity securities	42,752	85,988
Partnership interests	307,025	296,012
Collateralized loan obligations	0	0
Other fixed income	1,279,556	339,136
Total derivative assets, at fair value	1,630,164	721,136
Liabilities, Fair Value Disclosure [Abstract]
Derivatives instruments		(4,106)
Total liabilities, at fair value	(811)	(4,106)
Consolidated Funds \| Level III \| Transaction price
Assets, Fair Value Disclosure [Abstract]
Equity securities	2,001	44,812
Consolidated Funds \| Level III \| Other
Assets, Fair Value Disclosure [Abstract]
Equity securities	$ 40,426	$ 40,745
Consolidated Funds \| Level III \| Other \| Net income multiple
Unobservable Input
Equity securities	32.5	36.2
Consolidated Funds \| Level III \| Other \| Net income multiple \| Weighted Average
Unobservable Input
Equity securities	32.5	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]
Other fixed income	$ 1,223,236	$ 271,919
Liabilities, Fair Value Disclosure [Abstract]
Derivatives instruments	(811)	(4,106)
Consolidated Funds \| Level III \| Discounted cash flow
Assets, Fair Value Disclosure [Abstract]
Partnership interests	$ 307,025	$ 296,012
Consolidated Funds \| Level III \| Discounted cash flow \| Discount rate
Unobservable Input
Partnership interest	0.181	0.196
Consolidated Funds \| Level III \| Discounted cash flow \| Discount rate \| Weighted Average
Unobservable Input
Partnership interest	0.181	0.196
Consolidated Funds \| Level III \| Market approach
Assets, Fair Value Disclosure [Abstract]
Equity securities	$ 325	$ 431
Consolidated Funds \| Level III \| Market approach \| EBITDA multiple \| Minimum
Unobservable Input
Equity securities	10.0	8.2
Consolidated Funds \| Level III \| Market approach \| EBITDA multiple \| Maximum
Unobservable Input
Equity securities	28.8	21.3
Consolidated Funds \| Level III \| Market approach \| EBITDA multiple \| Weighted Average
Unobservable Input
Equity securities	18.9	16.1
Consolidated Funds \| Level III \| Income approach
Assets, Fair Value Disclosure [Abstract]
Other fixed income	$ 56,320	$ 67,217
Consolidated Funds \| Level III \| Income approach \| Yield \| Minimum
Unobservable Input
Fixed income securities	0.040	0.048
Consolidated Funds \| Level III \| Income approach \| Yield \| Maximum
Unobservable Input
Fixed income securities	0.255	0.143
Consolidated Funds \| Level III \| Income approach \| Yield \| Weighted Average
Unobservable Input
Fixed income securities	0.104	0.097
Ares Management L.P
Assets, Fair Value Disclosure [Abstract]
Equity securities	$ 15,577	$ 15,747
Partnership interests	4,207	36,824
Total derivative assets, at fair value	90,557	125,777
Liabilities, Fair Value Disclosure [Abstract]
Derivatives instruments		(113)
Total liabilities, at fair value	(5)	(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	82,623	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	47,561	46,918
Ares Management L.P \| Level III \| Broker quotes and/or 3rd party pricing services
Assets, Fair Value Disclosure [Abstract]
Collateralized loan obligations	$ 17,783	$ 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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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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