SEGMENT REPORTING (Other Income (Expense)) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other income adjustment
Total investment (income) loss - realized									$ (29,917)	$ (50,414)	$ (25,638)
Total consolidated other income	$ 91,629	$ 58,880	$ 29,387	$ 59,222	$ 39,841	$ 73,339	$ 17,406	$ (15,451)	239,118	115,135	36,082
Operating segment
Other income adjustment
Other non-cash expense									1,730	1,728	(110)
Offering costs									(688)	0	0
Reconciling items
Other income adjustment
Change in value of contingent consideration									20,156	17,675	21,064
Merger related expenses									0	0	(15,446)
Other non-cash expense									1,730	1,728	(110)
Offering costs									(688)	0	0
Total consolidated other income									164,209	44,745	37,858
Reconciling items | Subsidiaries | Non-Controlling interest
Other income adjustment
Total consolidated other income									24	0	0
Reconciling items | Equity method private investment partnership interests(1)
Other income adjustment
Performance fee reclass									1,936	2,479	7,398
OMG
Other income adjustment
Total investment (income) loss - realized									11,828	(19,381)	(750)
Total consolidated other income									11,828	(19,381)	(750)
Ares Management L.P
Other income adjustment
Change in value of contingent consideration									20,156	17,674	21,064
Other non-cash expense									1,731	0	(10)
Ares Management L.P | Operating segment
Other income adjustment
Total investment (income) loss - realized									74,909	70,390	(1,776)
Consolidated Funds | Reconciling items
Other income adjustment
Other income from Consolidated Funds added in consolidation, net									154,869	37,388	13,695
Other income (expense) from Consolidated Funds eliminated in consolidation, net									$ (25,646)	$ 4,856	$ 12,007