SEGMENT REPORTING (Other Income (Expense)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	$ 62,355	$ 32,787	$ (43,602)	$ 95,919
Principal investment income (loss)	14,494	7,007	39,372	28,332
Non-cash unrealized guarantee expense	9,500		9,500
Ares Management L.P
Segment Reporting, Other Significant Reconciling Item [Line Items]
Other income from Consolidated Funds eliminated in consolidation, net	2,203	(1,870)	9,848	(1,570)
Operating segment
Segment Reporting, Other Significant Reconciling Item [Line Items]
Investment (income) loss—unrealized	(89)	1,094	(73,039)	9,309
Other (income) expense, net	(9,518)	461	(9,518)	460
Operating segment | Ares Management L.P
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	14,494	7,007	39,372	28,332
Investment (income) loss—unrealized	1,479	(4,138)	83,369	(12,703)
Interest and other investment (income) loss—unrealized	(1,390)	3,044	(10,330)	3,394
Operating segment | Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	62,355	32,787	(43,602)	95,919
Reconciling items
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	(47,861)	(25,780)	82,974	(67,587)
Principal investment income (loss)	18,080	13,865	(24,951)	45,336
Other (income) expense, net	9,534	(461)	9,903	(460)
Reconciling items | Subsidiaries | Non-Controlling interest
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	(2,433)	(10)	12,859	(31)
Reconciling items | Performance income reclass
Segment Reporting, Other Significant Reconciling Item [Line Items]
Performance fee reclass	291	27	3,664	(553)
Reconciling items | Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Other (income) loss from Consolidated Funds added in consolidation, net	(68,132)	(37,070)	20,719	(101,285)
Eliminations | Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Other income from Consolidated Funds eliminated in consolidation, net	(3,470)	(1,124)	(11,478)	(1,214)
OMG
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	$ (1,820)	$ 87	$ (781)	$ (71)