SEGMENT REPORTING (Revenue Reconciliation) (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
Revenue adjustment
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 revenue									$ 1,433,126	1,218,239	1,085,043
Ares Management L.P
Revenue adjustment
Total revenues									1,765,438	958,461	1,479,943
Operating segment | Ares Management L.P
Revenue adjustment
Performance (income) loss-unrealized									(303,142)	247,212	(325,915)
Total segment revenue									1,433,126	1,218,239	1,085,043
Reconciling items
Revenue adjustment
Principal investment income									(44,320)	(1,047)	(89,031)
Total segment revenue									(332,312)	259,778	(394,900)
Reconciling items | Non-Controlling interest | Subsidiaries
Revenue adjustment
Total segment revenue									(3,138)	44	74
Reconciling items | Performance income reclass
Revenue adjustment
Performance fee reclass									740	205	1,936
Management fees | Ares Management L.P
Revenue adjustment
Total revenues									979,417	802,502	722,419
Management fees | Operating segment | Ares Management L.P
Revenue adjustment
Total revenues									1,012,530	836,744	744,825
Management fees | Consolidated Funds | Eliminations
Revenue adjustment
Total segment revenue									34,920	34,242	22,406
Incentive fees | Ares Management L.P
Revenue adjustment
Total revenues									69,197	63,380	16,220
Incentive fees | Consolidated Funds | Eliminations
Revenue adjustment
Total revenues									13,851	4,000	4,075
Principal investment income (loss) | Ares Management L.P
Revenue adjustment
Total revenues									56,555	(1,455)	64,444
Principal investment income (loss) | Consolidated Funds | Eliminations
Revenue adjustment
Total revenues									(12,235)	2,502	24,587
Administrative, transaction and other fees
Revenue adjustment
Total revenues									0
Administrative, transaction and other fees | Ares Management L.P
Revenue adjustment
Total revenues									38,397	51,624	56,406
Administrative, transaction and other fees | Reconciling items
Revenue adjustment
Total revenues									(31,629)	(27,380)	(34,049)
Administrative, transaction and other fees | Consolidated Funds | Reconciling items
Revenue adjustment
Total revenues									12,641	0	0
Carried interest allocation
Revenue adjustment
Total revenues									621,872
Carried interest allocation | Ares Management L.P
Revenue adjustment
Total revenues									621,872	42,410	620,454
Carried interest allocation | Consolidated Funds | Eliminations
Revenue adjustment
Total revenues									$ 0	$ 0	$ 1,017