FAIR VALUE (Valuation Techniques) (Details) $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Consolidated Funds
Assets, Fair Value Disclosure [Abstract]
Equity securities	$ 112,384	$ 196,470
Partnership interests	296,012	271,447
Collateralized loan obligations	7,973,748	6,678,091
Other fixed income	8,319,551	7,205,248
Total derivative assets, at fair value		3,209
Total assets, at fair value	8,728,614	7,676,374
Liabilities, Fair Value Disclosure [Abstract]
Derivatives instruments	(4,776)	(2,512)
Total liabilities, at fair value	(7,978,524)	(6,680,603)
Consolidated Funds \| Level III
Assets, Fair Value Disclosure [Abstract]
Equity securities	85,988	150,752
Partnership interests	296,012	271,447
Collateralized loan obligations	0	0
Other fixed income	339,136	547,958
Total derivative assets, at fair value		1,328
Total assets, at fair value	721,136	971,485
Liabilities, Fair Value Disclosure [Abstract]
Derivatives instruments	(4,106)	(648)
Total liabilities, at fair value	(4,106)	(648)
Consolidated Funds \| Level III \| Transaction price
Assets, Fair Value Disclosure [Abstract]
Equity securities	44,812	85,319
Consolidated Funds \| Level III \| Discounted cash flow
Assets, Fair Value Disclosure [Abstract]
Equity securities		$ 271,447
Partnership interests	$ 296,012
Consolidated Funds \| Level III \| Discounted cash flow \| Discount rate
Unobservable Input
Equity securities		0.208
Partnership interest	0.196
Consolidated Funds \| Level III \| Discounted cash flow \| Discount rate \| Weighted Average
Unobservable Input
Equity securities		0.208
Partnership interest	0.196
Consolidated Funds \| Level III \| Broker quotes and/or 3rd party pricing services
Assets, Fair Value Disclosure [Abstract]
Other fixed income	$ 271,919	$ 441,368
Total derivative assets, at fair value		1,328
Liabilities, Fair Value Disclosure [Abstract]
Derivatives instruments	(4,106)	(648)
Consolidated Funds \| Level III \| Other
Assets, Fair Value Disclosure [Abstract]
Equity securities	$ 40,745	$ 41,562
Consolidated Funds \| Level III \| Other \| Net income multiple
Unobservable Input
Equity securities	36.2
Consolidated Funds \| Level III \| Other \| Net income multiple \| Weighted Average
Unobservable Input
Equity securities	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 \| Enterprise value market multiple analysis
Assets, Fair Value Disclosure [Abstract]
Equity securities	$ 431	$ 23,871
Consolidated Funds \| Level III \| Enterprise value market multiple analysis \| EBITDA multiple \| Minimum
Unobservable Input
Equity securities	8.2
Consolidated Funds \| Level III \| Enterprise value market multiple analysis \| EBITDA multiple \| Maximum
Unobservable Input
Equity securities	21.3
Consolidated Funds \| Level III \| Enterprise value market multiple analysis \| EBITDA multiple \| Weighted Average
Unobservable Input
Equity securities	16.1
Consolidated Funds \| Level III \| Income approach
Assets, Fair Value Disclosure [Abstract]
Other fixed income	$ 67,217	$ 106,590
Consolidated Funds \| Level III \| Income approach \| Yield \| Minimum
Unobservable Input
Fixed income securities	0.048
Consolidated Funds \| Level III \| Income approach \| Yield \| Maximum
Unobservable Input
Fixed income securities	0.143
Consolidated Funds \| Level III \| Income approach \| Yield \| Weighted Average
Unobservable Input
Fixed income securities	0.097	0.096
Ares Management L.P
Assets, Fair Value Disclosure [Abstract]
Equity securities	$ 15,747	$ 11,681
Partnership interests	36,824	36,053
Total assets, at fair value	125,777	109,624
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities, at fair value	(113)	(869)
Ares Management L.P \| Level III
Assets, Fair Value Disclosure [Abstract]
Equity securities	14,704	10,397
Partnership interests	35,192	35,192
Total assets, at fair value	119,079	106,413
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities, at fair value	0	0
Ares Management L.P \| Level III \| Transaction price
Assets, Fair Value Disclosure [Abstract]
Equity securities	14,704	10,397
Partnership interests	32,661
Ares Management L.P \| Level III \| Discounted cash flow
Assets, Fair Value Disclosure [Abstract]
Partnership interests		$ 35,192
Ares Management L.P \| Level III \| Discounted cash flow \| Discount rate
Unobservable Input
Partnership interest		0.080
Ares Management L.P \| Level III \| Broker quotes and/or 3rd party pricing services
Assets, Fair Value Disclosure [Abstract]
Collateralized loan obligations	22,265	$ 20,824
Ares Management L.P \| Level III \| Other
Assets, Fair Value Disclosure [Abstract]
Partnership interests	2,531
Other fixed income	$ 46,918	$ 40,000

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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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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