SEGMENT REPORTING (Expenses) (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	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenses	$ 362,288	$ 395,701	$ 335,701	$ 369,107	$ 215,874	$ 227,188	$ 221,017	$ 206,283	$ 1,462,797	$ 870,362	$ 1,504,758
Equity compensation expense									97,691	89,724	69,711
Depreciation and amortization expense											17,900
Ares Management L.P
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenses										870,362
Transaction support expense									0	0	275,177
Due to affiliates	71,445				82,411				71,445	82,411
Ares Management L.P | Affiliated entity | Rent and other occupancy expenses | ARCC
Segment Reporting, Other Significant Reconciling Item [Line Items]
Due to affiliates	11,800				11,800		$ 600		11,800	11,800	2,200	$ 3,000	$ 3,200	$ 2,900
Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Due to affiliates	$ 0				$ 0				0	0
Operating segment
Segment Reporting, Other Significant Reconciling Item [Line Items]
Transaction support expense									16,266	2,936	259,899
Equity compensation expense									97,691	89,724	69,711
Deferred placement fees									24,306	20,343	19,765
Depreciation and amortization expense									40,602	25,087	30,481
Operating segment | Ares Management L.P
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenses									766,877	657,490	607,721
Performance related compensation-unrealized									(206,799)	221,343	(237,392)
Operating segment | Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenses									1,462,797	870,362	1,504,758
Reconciling items
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenses									(695,920)	(212,872)	(897,037)
Administrative fees									(31,629)	(27,380)	(34,049)
Transaction support expense									(16,266)	(2,936)	(280,055)
Equity compensation expense									(97,691)	(89,724)	(69,711)
Deferred placement fees									(24,306)	(20,343)	(19,765)
Depreciation and amortization expense									(40,602)	(25,087)	(30,481)
Other expenses									0	(11,836)	0
Reconciling items | Non-Controlling interest | Subsidiaries
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenses									(6,128)	(3,318)	(1,689)
Reconciling items | Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenses of Consolidated Funds added in consolidation									(90,816)	(92,006)	(65,501)
Expenses of Consolidated Funds eliminated in consolidation									48,771	38,242	26,481
OMG
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenses									$ 230,454	$ 199,827	$ 184,875