SEGMENT REPORTING - Revenue Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue adjustment
Total revenues	$ 948,719	$ 489,866	$ 2,901,926	$ 1,106,033
Principal investment income, net of eliminations	(5,356)	(14,494)	(20,454)	(39,372)
Total segment revenue	509,142	428,307	1,428,143	1,184,162
Ares Management L.P
Revenue adjustment
Total revenues	948,719	489,866	2,901,926	1,106,033
Operating segment | Ares Management L.P
Revenue adjustment
Performance (income) loss—unrealized	(415,317)	(52,488)	(1,381,697)	77,866
Total segment revenue	509,142	428,307	1,428,143	1,184,162
Reconciling items
Revenue adjustment
Principal investment income, net of eliminations	(20,719)	(18,080)	(96,448)	24,951
Total segment revenue	(439,577)	(61,559)	(1,473,783)	78,129
Reconciling items | Non-Controlling interest | Subsidiaries
Revenue adjustment
Total segment revenue	(6,927)	(4,323)	(16,795)	(5,808)
Reconciling items | Performance income reclass
Revenue adjustment
Performance income (loss) reclass	680	(291)	1,285	(3,664)
OMG
Revenue adjustment
Total revenues	(3,446)	0	(3,446)	0
Management fees
Revenue adjustment
Total revenues	448,262		1,135,821
Management fees | Ares Management L.P
Revenue adjustment
Total revenues	448,262	292,434	1,135,821	823,150
Management fees | Operating segment | Ares Management L.P
Revenue adjustment
Total revenues	453,950	300,131	1,154,248	851,581
Management fees | OMG
Revenue adjustment
Total revenues	0	0	0	0
Management fees | Consolidated Funds | Eliminations
Revenue adjustment
Total segment revenue	11,051	11,719	33,416	33,601
Incentive fees
Revenue adjustment
Total revenues	696		19,420
Incentive fees | Ares Management L.P
Revenue adjustment
Total revenues	696	7,194	19,420	4,276
Incentive fees | Consolidated Funds | Eliminations
Revenue adjustment
Total revenues	0	0	1,528	(70)
Administrative, transaction and other fees
Revenue adjustment
Total revenues	24,860		49,501
Administrative, transaction and other fees | Ares Management L.P
Revenue adjustment
Total revenues	24,860	9,852	49,501	28,897
Administrative, transaction and other fees | Reconciling items
Revenue adjustment
Total revenues	(15,632)	(9,216)	(34,754)	(27,715)
Administrative, transaction and other fees | Consolidated Funds | Reconciling items
Revenue adjustment
Total revenues	4,264	4,448	13,157	12,249
Principal investment income
Revenue adjustment
Total revenues	14,250		86,477
Principal investment income | Ares Management L.P
Revenue adjustment
Total revenues	14,250	11,408	86,477	8,330
Principal investment income | Reconciling items
Revenue adjustment
Principal investment income, net of eliminations	$ (14,250)	$ (11,408)	$ (86,477)	$ (8,330)