SEGMENT REPORTING (Revenue, Expenses and 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 revenues
Total revenues	$ 436,929	$ 466,490	$ 384,822	$ 477,197	$ 247,432	$ 240,777	$ 204,163	$ 266,089		$ 958,461	$ 1,479,943
Total segment revenues									$ 1,433,126	1,218,239	1,085,043
Segment expenses
Total 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
Segment other income
Total other income	$ 26,620	$ 32,787	$ 35,262	$ 27,870	$ (12,678)	$ 38,754	$ 67,926	$ 2,240	122,539	96,242	174,674
Operating segment
Segment revenues
Performance income—realized									402,518	357,207	317,787
Segment expenses
Total performance related compensation - realized									290,382	251,597	242,330
Ares Management L.P
Segment revenues
Total revenues									1,765,438	958,461	1,479,943
Segment expenses
Compensation and benefits									653,352	570,380	514,109
General, administrative and other expenses									270,219	215,964	196,730
Total expenses										870,362
Segment other income
Total other income										96,242
Ares Management L.P | Management fees
Segment revenues
Total revenues									979,417	802,502	722,419
Ares Management L.P | Operating segment
Segment revenues
Performance income—realized									402,518	357,207	317,787
Total segment revenues									1,433,126	1,218,239	1,085,043
Segment expenses
Compensation and benefits									389,045	331,443	302,976
General, administrative and other expenses									87,450	74,450	62,415
Total performance related compensation - realized									290,382	251,597	242,330
Total expenses									766,877	657,490	607,721
Segment other income
Investment income—realized									58,173	31,717	35,261
Interest and other investment income—realized									29,349	17,231	13,929
Interest expense									(17,807)	(19,222)	(19,273)
Total other income									69,715	29,726	29,917
Ares Management L.P | Operating segment | Management fees
Segment revenues
Total revenues									1,012,530	836,744	744,825
Ares Management L.P | Operating segment | Other fees
Segment revenues
Total revenues									$ 18,078	$ 24,288	$ 22,431