SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Condensed Consolidated Statement of Financial Condition) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	$ (50,820)	$ (29,336)
Assets
Investments, at fair value				$ 1,724,571
Other assets				130,341
Assets	12,014,196	10,154,692		8,563,522
Liabilities	10,155,598	8,760,351		7,103,230
Cumulative effect of the adoption of ASC 606				0
Additional paid-in-capital	525,244	326,007
Accumulated other comprehensive loss, net of tax	(6,047)	(8,524)
Stockholders' Equity Attributable to Parent	768,290	587,924		1,460,292
Total equity	1,858,598	1,394,341		1,460,292	$ 1,377,262
Total liabilities and equity	12,014,196	10,154,692		$ 8,563,522
Ares Management L.P
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	(50,820)	(29,336)
Assets
Cash and cash equivalents	138,384	110,247
Investments, at fair value	1,663,664	1,326,137
Due from affiliates	268,099	199,377
Other assets	341,293	377,651
Additional paid-in-capital	525,244	326,007
Accumulated other comprehensive loss, net of tax	(6,047)	(8,524)
Stockholders' Equity Attributable to Parent	768,290	587,924
Ares Management L.P | Accrued Interest
Assets
Investments, at fair value		841,079
Consolidated Funds
Assets
Cash and cash equivalents	606,321	384,644
Investments, at fair value	8,727,947	7,673,165
Due from affiliates	6,192	17,609
Other assets	30,081	23,786
Non-controlling interest in Consolidated Funds	618,020	503,637
AOG
Assets
Non-controlling interest in Ares Operating Group entities	$ 472,288	302,780
Accounting Standards Update 2016-07 | Adjustments | Ares Management L.P
Assets
Cumulative effect of the adoption of ASC 606			$ 22,600
ASC 606
Assets
Cumulative effect of the adoption of ASC 606			(22,611)
ASC 606 | Adjustments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings		(5,095)
Assets
Investments, at fair value		0	0
Due from affiliates		0
Other assets		40,374	(22,611)
Assets		40,373	(22,611)
Liabilities			0
Cumulative effect of the adoption of ASC 606			(22,611)
Non-controlling interest in Consolidated Funds		(7,574)
Additional paid-in-capital		23,587
Accumulated other comprehensive loss, net of tax		(208)
Stockholders' Equity Attributable to Parent		18,284	(22,611)
Total equity		40,373
Total liabilities and equity		40,373	(22,611)
ASC 606 | Balances without adoption of ASC 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings		(34,431)
Assets
Investments, at fair value			1,724,571
Other assets			107,730
Assets		10,195,065	8,540,911
Liabilities			7,103,230
Cumulative effect of the adoption of ASC 606			(22,611)
Additional paid-in-capital		349,594
Accumulated other comprehensive loss, net of tax		(8,732)
Stockholders' Equity Attributable to Parent		606,208	1,437,681
Total equity		1,434,714
Total liabilities and equity		10,195,065	$ 8,540,911
ASC 606 | Ares Management L.P | Adjustments
Assets
Cash and cash equivalents		0
ASC 606 | Ares Management L.P | Balances without adoption of ASC 606
Assets
Cash and cash equivalents		110,247
Investments, at fair value		1,326,137
Due from affiliates		199,377
Other assets		418,025
ASC 606 | Consolidated Funds | Balances without adoption of ASC 606
Assets
Non-controlling interest in Consolidated Funds		496,063
ASC 606 | AOG | Adjustments
Assets
Non-controlling interest in Ares Operating Group entities		29,663
ASC 606 | AOG | Balances without adoption of ASC 606
Assets
Non-controlling interest in Ares Operating Group entities		$ 332,443