SEGMENT REPORTING (Other Income (Expense)) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	$ 26,620	$ 32,787	$ 35,262	$ 27,870	$ (12,678)	$ 38,754	$ 67,926	$ 2,240	$ 122,539	$ 96,242	$ 174,674
Ares Management L.P
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income										96,242
Other (income) loss from Consolidated Funds eliminated in consolidation, net									(7,840)	(851)	19,470
Contingent consideration									0	0	(20,156)
Other Noncash Income (Expense)									0	(10)	1,731
Operating segment
Segment Reporting, Other Significant Reconciling Item [Line Items]
Investment (income) loss - unrealized									(35,681)	(49,474)	44,992
Other Noncash Income (Expense)									460	(13,489)	1,042
Operating segment | Ares Management L.P
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income									69,715	29,726	29,917
Investment (income) loss - unrealized									26,620	49,241	(46,860)
Interest and other investment loss - unrealized									9,061	233	1,868
Operating segment | Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income									122,539	96,242	174,674
Reconciling items
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income									(52,824)	(66,516)	(144,757)
Principal investment income									(44,320)	(1,047)	(89,031)
Contingent consideration									0	0	(20,156)
Other Noncash Income (Expense)									(460)	1,653	(1,042)
Reconciling items | Subsidiaries | Non-Controlling interest
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income									(39)	(19)	(24)
Reconciling items | Performance income reclass
Segment Reporting, Other Significant Reconciling Item [Line Items]
Performance fee reclass									(740)	(205)	(1,936)
Reconciling items | Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Other income from Consolidated Funds added in consolidation, net									(117,405)	(114,286)	(154,869)
Eliminations | Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Other (income) loss from Consolidated Funds eliminated in consolidation, net									(12,991)	(865)	1,059
OMG
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income									$ (1,190)	$ (3,315)	$ (11,828)