SEGMENT REPORTING - Other Income (Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	$ 111,536	$ 62,355	$ 218,011	$ (43,602)
Other income, net	36,654		30,686
Principal investment income (loss)	5,356	14,494	20,454	39,372
Ares Management L.P
Segment Reporting, Other Significant Reconciling Item [Line Items]
Other income, net	36,654	2,203	30,686	9,848
Operating segment
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total investment (income) loss—unrealized	(5,014)	89	(57,531)	73,039
Other (income) expense, net	42,025	(9,518)	42,490	(9,518)
Operating segment | Ares Management L.P
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	5,356	14,494	20,454	39,372
Total investment (income) loss—unrealized	(3,609)	1,479	(60,588)	83,369
Interest and other investment (income) loss—unrealized	(1,405)	(1,390)	3,057	(10,330)
Operating segment | Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	111,536	62,355	218,011	(43,602)
Reconciling items
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	(106,180)	(47,861)	(197,557)	82,974
Principal investment income (loss)	20,719	18,080	96,448	(24,951)
Other (income) expense, net	(34,812)	9,534	(34,666)	9,903
Reconciling items | Subsidiaries | Non-Controlling interest
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	(5,170)	(2,433)	(9,191)	12,859
Reconciling items | Performance income reclass
Segment Reporting, Other Significant Reconciling Item [Line Items]
Performance (income) loss reclass	(680)	291	(1,285)	3,664
Reconciling items | Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Other (income) loss from Consolidated Funds added in consolidation, net	(76,287)	(68,132)	(178,195)	20,719
Eliminations | Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Other income, net	(4,973)	(3,470)	(13,783)	(11,478)
OMG
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	$ (37)	$ 1,820	$ (646)	$ 781