SEGMENT REPORTING (Revenue Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue adjustment
Total revenues	$ 489,866	$ 466,490	$ 1,106,033	$ 1,328,509
Principal investment income	(14,494)	(7,007)	(39,372)	(28,332)
Total segment revenue	428,307	272,635	1,184,162	864,179
Ares Management L.P
Revenue adjustment
Total revenues	489,866	466,490	1,106,033	1,328,509
Operating segment | Ares Management L.P
Revenue adjustment
Performance (income) loss-unrealized	(52,488)	(181,174)	77,866	(426,411)
Total segment revenue	428,307	272,635	1,184,162	864,179
Reconciling items
Revenue adjustment
Principal investment income	(18,080)	(13,865)	24,951	(45,336)
Total segment revenue	(61,559)	(193,855)	78,129	(464,330)
Reconciling items | Non-Controlling interest | Subsidiaries
Revenue adjustment
Total segment revenue	(4,323)	(396)	(5,808)	(739)
Reconciling items | Performance income reclass
Revenue adjustment
Performance fee reclass	(291)	(27)	(3,664)	553
Management fees | Ares Management L.P
Revenue adjustment
Total revenues	292,434	251,591	823,150	714,096
Management fees | Operating segment | Ares Management L.P
Revenue adjustment
Total revenues	300,131	259,978	851,581	739,269
Management fees | Consolidated Funds | Eliminations
Revenue adjustment
Total segment revenue	11,719	8,780	33,601	25,928
Incentive fees | Ares Management L.P
Revenue adjustment
Total revenues	7,194	1,712	4,276	28,747
Incentive fees | Consolidated Funds | Eliminations
Revenue adjustment
Total revenues	0	0	(70)	5,184
Administrative, transaction and other fees
Revenue adjustment
Total revenues	0	0	0
Administrative, transaction and other fees | Ares Management L.P
Revenue adjustment
Total revenues	9,852	14,995	28,897	35,866
Administrative, transaction and other fees | Reconciling items
Revenue adjustment
Total revenues	(9,216)	(9,649)	(27,715)	(22,853)
Administrative, transaction and other fees | Consolidated Funds | Reconciling items
Revenue adjustment
Total revenues	4,448	0	12,249	0
Principal investment income | Ares Management L.P
Revenue adjustment
Total revenues	11,408	11,389	8,330	45,992
Principal investment income | Reconciling items
Revenue adjustment
Principal investment income	$ (11,408)	$ (11,389)	$ (8,330)	$ (45,992)