SEGMENT REPORTING (Other Income (Expense)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	$ 121,906	$ 35,262	$ (105,957)	$ 63,132
Principal investment income (loss)	11,107	6,940	24,878	21,325
Ares Management L.P
Segment Reporting, Other Significant Reconciling Item [Line Items]
Other (income) loss from Consolidated Funds eliminated in consolidation, net	2,181	4,797	7,645	300
Operating segment
Segment Reporting, Other Significant Reconciling Item [Line Items]
Investment (income) loss—unrealized	27,683	(2,990)	(72,950)	8,215
Other expense, net	0	(2)	0	(1)
Operating segment | Ares Management L.P
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	11,107	6,940	24,878	21,325
Investment (income) loss—unrealized	(23,704)	7,618	81,890	(8,565)
Interest and other investment (income) loss—unrealized	(3,979)	(4,628)	(8,940)	350
Operating segment | Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	121,906	35,262	(105,957)	63,132
Reconciling items
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	(110,799)	(28,322)	130,835	(41,807)
Principal investment income (loss)	32,957	1,579	(43,031)	31,471
Other expense, net	347	2	369	1
Reconciling items | Subsidiaries | Non-Controlling interest
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	(4,391)	(5)	15,292	(21)
Reconciling items | Performance income reclass
Segment Reporting, Other Significant Reconciling Item [Line Items]
Performance fee reclass	1,656	26	3,373	(580)
Reconciling items | Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Other (income) loss from Consolidated Funds added in consolidation, net	(109,394)	(33,008)	88,851	(64,215)
Eliminations | Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Other (income) loss from Consolidated Funds eliminated in consolidation, net	(4,189)	282	(8,008)	(90)
OMG
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	$ (102)	$ (188)	$ 1,039	$ (158)