SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Condensed Consolidated Statement of Changes in Equity) (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]
Total equity	$ 1,858,598	$ 1,394,341		$ 1,460,292	$ 1,377,262
Cumulative effect of the adoption of ASC 606				0
As adjusted balance at January 1, 2018			$ 1,437,681	1,437,681
Accumulated Other Comprehensive Income (Loss)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total equity	(6,047)	(8,524)		(4,208)	(8,939)
As adjusted balance at January 1, 2018				(4,208)
Ares Management L.P | Accumulated Other Comprehensive Income (Loss)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total equity				(4,208)
As adjusted balance at January 1, 2018			(4,208)
AOG | Non-Controlling interest
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total equity	472,288	302,780		358,186	447,615
As adjusted balance at January 1, 2018			341,069
Consolidated Funds | Non-Controlling interest
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total equity	618,020	503,637		528,488	338,035
As adjusted balance at January 1, 2018			533,821	533,821
Partners' Capital | Ares Management L.P
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total equity	0	0		279,065	301,790
As adjusted balance at January 1, 2018			268,238	268,238
Partners' Capital | Preferred Partner
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total equity	$ 0	$ 0		298,761	$ 298,761
As adjusted balance at January 1, 2018			298,761	$ 298,761
ASC 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of the adoption of ASC 606			(22,611)
ASC 606 | Ares Management L.P | Accumulated Other Comprehensive Income (Loss)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of the adoption of ASC 606			0
ASC 606 | AOG | Non-Controlling interest
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of the adoption of ASC 606			(17,117)
ASC 606 | Consolidated Funds | Non-Controlling interest
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of the adoption of ASC 606			5,333
ASC 606 | Partners' Capital | Ares Management L.P
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of the adoption of ASC 606			(10,827)
ASC 606 | Partners' Capital | Preferred Partner
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of the adoption of ASC 606			$ 0