FAIR VALUE (Assets and Liabilities Measured at Fair Value) (Details) $ in Thousands	12 Months Ended
Dec. 31, 2017 USD ($) quote	Dec. 31, 2016 USD ($)
FAIR VALUE
Number of quote obtained directly from a broker making a market for the asset \| quote	1
Number of price obtained directly from a pricing vendor for each security or similar securities \| quote	1
Investments Measured at NAV	$ 35,998	$ 19,819
Minimum
FAIR VALUE
Period within which investors of open ended and evergreen funds can withdraw their capital	1 year
Number of broker non-binding quotes to measure fair value of assets or liabilities \| quote	1
Maximum
FAIR VALUE
Period within which investors of open ended and evergreen funds can withdraw their capital	3 years
Number of broker non-binding quotes to measure fair value of assets or liabilities \| quote	2
Ares Management L.P
FAIR VALUE
Investments, at fair value	$ 277,561	142,440
Investments Measured at NAV	35,998	19,819
Derivative assets, at fair value	498	3,171
Assets, at fair value	278,059	145,611
Derivative liabilities, at fair value	(2,639)	0
Contingent considerations		(22,156)
Total liabilities, at fair value	(2,639)	(22,156)
Ares Management L.P \| Foreign exchange contracts
FAIR VALUE
Derivative assets, at fair value	498	3,171
Derivative liabilities, at fair value	(2,639)	0
Ares Management L.P \| Fixed income - collateralized loan obligations
FAIR VALUE
Investments, at fair value	195,158	89,111
Ares Management L.P \| Equity securities
FAIR VALUE
Investments, at fair value	1,636	100
Investments Measured at NAV	0
Ares Management L.P \| Partnership interests
FAIR VALUE
Investments, at fair value	80,767	53,229
Investments Measured at NAV	35,998	19,819
Ares Management L.P \| Level I
FAIR VALUE
Investments, at fair value	520	100
Assets, at fair value	520	100
Derivative liabilities, at fair value	0
Contingent considerations		0
Total liabilities, at fair value	0	0
Ares Management L.P \| Level I \| Foreign exchange contracts
FAIR VALUE
Derivative assets, at fair value	0	0
Ares Management L.P \| Level I \| Fixed income - collateralized loan obligations
FAIR VALUE
Investments, at fair value	0	0
Ares Management L.P \| Level I \| Equity securities
FAIR VALUE
Investments, at fair value	520	100
Ares Management L.P \| Level I \| Partnership interests
FAIR VALUE
Investments, at fair value	0	0
Ares Management L.P \| Level II
FAIR VALUE
Investments, at fair value	1,116	0
Derivative assets, at fair value	498
Assets, at fair value	1,614	3,171
Derivative liabilities, at fair value	2,639
Contingent considerations		0
Total liabilities, at fair value	(2,639)	0
Ares Management L.P \| Level II \| Foreign exchange contracts
FAIR VALUE
Derivative assets, at fair value		3,171
Ares Management L.P \| Level II \| Fixed income - collateralized loan obligations
FAIR VALUE
Investments, at fair value	0	0
Ares Management L.P \| Level II \| Equity securities
FAIR VALUE
Investments, at fair value	1,116	0
Ares Management L.P \| Level II \| Partnership interests
FAIR VALUE
Investments, at fair value	0	0
Ares Management L.P \| Level III
FAIR VALUE
Investments, at fair value	239,927	122,521
Assets, at fair value	239,927	122,521
Derivative liabilities, at fair value	0
Contingent considerations		(22,156)
Total liabilities, at fair value	0	(22,156)
Liabilities, at fair value		(22,156)
Ares Management L.P \| Level III \| Foreign exchange contracts
FAIR VALUE
Derivative assets, at fair value		0
Ares Management L.P \| Level III \| Fixed income - collateralized loan obligations
FAIR VALUE
Investments, at fair value	195,158	89,111
Ares Management L.P \| Level III \| Equity securities
FAIR VALUE
Investments, at fair value	0	0
Ares Management L.P \| Level III \| Partnership interests
FAIR VALUE
Investments, at fair value	44,769	33,410
Consolidated Funds
FAIR VALUE
Investments, at fair value	5,582,842	3,330,203
Derivative assets, at fair value	1,366	820
Assets, at fair value	5,584,208	3,331,023
Derivative liabilities, at fair value	(462)	(2,999)
Loan obligations of debt	(4,963,194)	(3,031,112)
Liabilities, at fair value	(4,963,656)	(3,034,111)
Consolidated Funds \| Foreign exchange contracts
FAIR VALUE
Derivative assets, at fair value	0	529
Derivative liabilities, at fair value	0	0
Consolidated Funds \| Asset swaps - other
FAIR VALUE
Derivative assets, at fair value	1,366	291
Derivative liabilities, at fair value	(462)	(2,999)
Consolidated Funds \| Fixed income - collateralized loan obligations
FAIR VALUE
Investments, at fair value	10,000	5,973
Consolidated Funds \| Equity securities
FAIR VALUE
Investments, at fair value	235,135	204,921
Consolidated Funds \| Partnership interests
FAIR VALUE
Investments, at fair value	232,332	171,696
Consolidated Funds \| Bonds
FAIR VALUE
Investments, at fair value	89,192	141,949
Consolidated Funds \| Loans
FAIR VALUE
Investments, at fair value	5,016,183	2,805,640
Consolidated Funds \| Fixed Income
FAIR VALUE
Investments, at fair value	5,115,375	2,953,562
Consolidated Funds \| Other
FAIR VALUE
Investments, at fair value	0	24
Consolidated Funds \| Level I
FAIR VALUE
Investments, at fair value	72,558	56,662
Derivative assets, at fair value	0	0
Assets, at fair value	72,558	56,662
Loan obligations of debt	0	0
Liabilities, at fair value	0	0
Consolidated Funds \| Level I \| Foreign exchange contracts
FAIR VALUE
Derivative assets, at fair value	0	0
Consolidated Funds \| Level I \| Asset swaps - other
FAIR VALUE
Derivative assets, at fair value	0	0
Derivative liabilities, at fair value	0	0
Consolidated Funds \| Level I \| Fixed income - collateralized loan obligations
FAIR VALUE
Investments, at fair value	0	0
Consolidated Funds \| Level I \| Equity securities
FAIR VALUE
Investments, at fair value	72,558	56,662
Consolidated Funds \| Level I \| Partnership interests
FAIR VALUE
Investments, at fair value	0	0
Consolidated Funds \| Level I \| Bonds
FAIR VALUE
Investments, at fair value	0	0
Consolidated Funds \| Level I \| Loans
FAIR VALUE
Investments, at fair value	0	0
Consolidated Funds \| Level I \| Fixed Income
FAIR VALUE
Investments, at fair value	0	0
Consolidated Funds \| Level I \| Other
FAIR VALUE
Investments, at fair value	0	0
Consolidated Funds \| Level II
FAIR VALUE
Investments, at fair value	4,847,486	2,728,902
Derivative assets, at fair value	0	529
Assets, at fair value	4,847,486	2,729,431
Loan obligations of debt	(4,963,194)	(3,031,112)
Liabilities, at fair value	(4,963,194)	(3,031,112)
Consolidated Funds \| Level II \| Foreign exchange contracts
FAIR VALUE
Derivative assets, at fair value	0	529
Consolidated Funds \| Level II \| Asset swaps - other
FAIR VALUE
Derivative assets, at fair value	0	0
Derivative liabilities, at fair value	0	0
Consolidated Funds \| Level II \| Fixed income - collateralized loan obligations
FAIR VALUE
Investments, at fair value	10,000	0
Consolidated Funds \| Level II \| Equity securities
FAIR VALUE
Investments, at fair value	0	17,569
Consolidated Funds \| Level II \| Partnership interests
FAIR VALUE
Investments, at fair value	0	0
Consolidated Funds \| Level II \| Bonds
FAIR VALUE
Investments, at fair value	82,151	104,886
Consolidated Funds \| Level II \| Loans
FAIR VALUE
Investments, at fair value	4,755,335	2,606,423
Consolidated Funds \| Level II \| Fixed Income
FAIR VALUE
Investments, at fair value	4,847,486	2,711,309
Consolidated Funds \| Level II \| Other
FAIR VALUE
Investments, at fair value	0	24
Consolidated Funds \| Level III
FAIR VALUE
Investments, at fair value	662,798	544,639
Derivative assets, at fair value	1,366	291
Assets, at fair value	664,164	544,930
Loan obligations of debt	0	0
Liabilities, at fair value	(462)	(2,999)
Consolidated Funds \| Level III \| Foreign exchange contracts
FAIR VALUE
Derivative assets, at fair value	0	0
Consolidated Funds \| Level III \| Asset swaps - other
FAIR VALUE
Derivative assets, at fair value	1,366	291
Derivative liabilities, at fair value	(462)	(2,999)
Consolidated Funds \| Level III \| Fixed income - collateralized loan obligations
FAIR VALUE
Investments, at fair value	0	5,973
Consolidated Funds \| Level III \| Equity securities
FAIR VALUE
Investments, at fair value	162,577	130,690
Consolidated Funds \| Level III \| Partnership interests
FAIR VALUE
Investments, at fair value	232,332	171,696
Consolidated Funds \| Level III \| Bonds
FAIR VALUE
Investments, at fair value	7,041	37,063
Consolidated Funds \| Level III \| Loans
FAIR VALUE
Investments, at fair value	260,848	199,217
Consolidated Funds \| Level III \| Fixed Income
FAIR VALUE
Investments, at fair value	267,889	242,253
Consolidated Funds \| Level III \| Other
FAIR VALUE
Investments, at fair value	$ 0	$ 0

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