SEGMENT REPORTING - Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment reporting
Total revenues	$ 948,719	$ 489,866	$ 2,901,926	$ 1,106,033
Compensation and benefits	(335,569)		(837,108)
General, administrative and other expenses	(134,453)		(285,471)
Operating segment
Segment reporting
Fee related earnings	(273,140)	(167,901)	(683,075)	(468,685)
Performance income—realized	45,341	123,265	249,989	319,660
Performance related compensation—realized	(33,728)	(97,538)	(185,306)	(252,575)
Realized net investment income (loss)	5,356	14,494	20,454	39,372
Realized income (loss)	(290,109)	(208,122)	(768,212)	(575,142)
OMG
Segment reporting
Total revenues	(3,446)	0	(3,446)	0
Compensation and benefits	(66,107)	(41,551)	(158,943)	(114,916)
General, administrative and other expenses	(28,142)	(19,519)	(69,872)	(56,877)
Fee related earnings	(90,803)	(61,070)	(225,369)	(171,793)
Performance income—realized	0	0	0	0
Performance related compensation—realized	0	0	0	0
Realized net performance income	0	0	0	0
Investment income (loss)—realized	0	0	0	(5,698)
Interest and other investment income (expense)—realized	(270)	(503)	170	(588)
Interest expense	(160)	(141)	(397)	(1,262)
Realized net investment income (loss)	(430)	(644)	(227)	(7,548)
Realized income (loss)	(91,233)	(61,714)	(225,596)	(179,341)
Total
Segment reporting
Compensation and benefits	(225,813)	(154,400)	(577,711)	(442,325)
General, administrative and other expenses	(59,097)	(43,811)	(146,183)	(125,285)
Fee related earnings	182,337	106,831	457,706	296,892
Performance income—realized	45,341	123,265	249,989	319,660
Performance related compensation—realized	(33,728)	(97,538)	(185,306)	(252,575)
Realized net performance income	11,613	25,727	64,683	67,085
Investment income (loss)—realized	5,362	16,837	12,695	32,065
Interest and other investment income (expense)—realized	11,087	3,828	32,657	17,962
Interest expense	(11,523)	(6,815)	(25,125)	(18,203)
Realized net investment income (loss)	4,926	13,850	20,227	31,824
Realized income (loss)	198,876	146,408	542,616	395,801
Ares Management L.P
Segment reporting
Total revenues	948,719	489,866	2,901,926	1,106,033
Compensation and benefits	(335,569)	(194,267)	(837,108)	(559,482)
General, administrative and other expenses	(134,453)	(69,938)	(285,471)	(190,353)
Ares Management L.P | Operating segment
Segment reporting
Compensation and benefits	(159,706)	(112,849)	(418,768)	(327,409)
General, administrative and other expenses	(30,955)	(24,292)	(76,311)	(68,408)
Fee related earnings	273,140	167,901	683,075	468,685
Performance income—realized	45,341	123,265	249,989	319,660
Performance related compensation—realized	(33,728)	(97,538)	(185,306)	(252,575)
Realized net performance income	11,613	25,727	64,683	67,085
Investment income (loss)—realized	5,362	16,837	12,695	37,763
Interest and other investment income (expense)—realized	11,357	4,331	32,487	18,550
Interest expense	(11,363)	(6,674)	(24,728)	(16,941)
Realized net investment income (loss)	5,356	14,494	20,454	39,372
Realized income (loss)	290,109	208,122	768,212	575,142
Ares Management L.P | Operating segment | Credit Group
Segment reporting
Compensation and benefits	(86,502)	(74,373)	(252,783)	(222,063)
General, administrative and other expenses	(14,930)	(13,789)	(37,716)	(41,626)
Fee related earnings	175,957	125,107	492,697	354,964
Performance income—realized	6,332	7,069	78,255	16,085
Performance related compensation—realized	(3,079)	(4,131)	(49,433)	(12,142)
Realized net performance income	3,253	2,938	28,822	3,943
Investment income (loss)—realized	618	0	1,858	(843)
Interest and other investment income (expense)—realized	4,716	1,962	14,354	13,166
Interest expense	(2,392)	(2,340)	(5,372)	(6,391)
Realized net investment income (loss)	2,942	(378)	10,840	5,932
Realized income (loss)	182,152	127,667	532,359	364,839
Ares Management L.P | Operating segment | Private Equity Group
Segment reporting
Compensation and benefits	(26,773)	(21,224)	(73,534)	(62,946)
General, administrative and other expenses	(6,238)	(6,002)	(17,499)	(16,083)
Fee related earnings	36,950	27,429	80,712	81,319
Performance income—realized	34,316	115,997	159,479	276,469
Performance related compensation—realized	(27,483)	(93,284)	(127,706)	(222,949)
Realized net performance income	6,833	22,713	31,773	53,520
Investment income (loss)—realized	2,020	16,351	5,308	35,866
Interest and other investment income (expense)—realized	4,861	1,065	10,716	2,364
Interest expense	(2,726)	(2,216)	(6,032)	(6,106)
Realized net investment income (loss)	4,155	15,200	9,992	32,124
Realized income (loss)	47,938	65,342	122,477	166,963
Ares Management L.P | Operating segment | Real Estate Group
Segment reporting
Compensation and benefits	(29,160)	(13,011)	(60,767)	(38,159)
General, administrative and other expenses	(5,420)	(2,987)	(12,064)	(9,185)
Fee related earnings	24,261	7,794	47,375	24,831
Performance income—realized	4,693	199	12,255	27,106
Performance related compensation—realized	(3,166)	(123)	(8,167)	(17,484)
Realized net performance income	1,527	76	4,088	9,622
Investment income (loss)—realized	1,699	486	4,182	2,740
Interest and other investment income (expense)—realized	918	1,308	3,892	3,024
Interest expense	(1,683)	(1,389)	(3,930)	(3,715)
Realized net investment income (loss)	934	405	4,144	2,049
Realized income (loss)	26,722	8,275	55,607	36,502
Ares Management L.P | Operating segment | Secondary Solutions Group
Segment reporting
Compensation and benefits	(11,955)	0	(16,244)	0
General, administrative and other expenses	(2,593)	0	(3,452)	0
Fee related earnings	26,516	0	34,266	0
Performance income—realized	0	0	0	0
Performance related compensation—realized	0	0	0	0
Realized net performance income	0	0	0	0
Investment income (loss)—realized	0	0	0	0
Interest and other investment income (expense)—realized	699	0	701	0
Interest expense	(427)	0	(432)	0
Realized net investment income (loss)	272	0	269	0
Realized income (loss)	26,788	0	34,535	0
Ares Management L.P | Operating segment | Strategic Initiatives
Segment reporting
Compensation and benefits	(5,316)	(4,241)	(15,440)	(4,241)
General, administrative and other expenses	(1,774)	(1,514)	(5,580)	(1,514)
Fee related earnings	9,456	7,571	28,025	7,571
Performance income—realized	0	0	0	0
Performance related compensation—realized	0	0	0	0
Realized net performance income	0	0	0	0
Investment income (loss)—realized	1,025	0	1,347	0
Interest and other investment income (expense)—realized	163	(4)	2,824	(4)
Interest expense	(4,135)	(729)	(8,962)	(729)
Realized net investment income (loss)	(2,947)	(733)	(4,791)	(733)
Realized income (loss)	6,509	6,838	23,234	6,838
Management fees
Segment reporting
Total revenues	448,262		1,135,821
Management fees | OMG
Segment reporting
Total revenues	0	0	0	0
Management fees | Total
Segment reporting
Total revenues	453,950	300,131	1,154,248	851,581
Management fees | Ares Management L.P
Segment reporting
Total revenues	448,262	292,434	1,135,821	823,150
Management fees | Ares Management L.P | Operating segment
Segment reporting
Total revenues	453,950	300,131	1,154,248	851,581
Management fees | Ares Management L.P | Operating segment | Credit Group
Segment reporting
Total revenues	271,591	208,371	764,702	606,596
Management fees | Ares Management L.P | Operating segment | Private Equity Group
Segment reporting
Total revenues	69,591	54,653	171,019	160,206
Management fees | Ares Management L.P | Operating segment | Real Estate Group
Segment reporting
Total revenues	55,160	23,787	115,602	71,459
Management fees | Ares Management L.P | Operating segment | Secondary Solutions Group
Segment reporting
Total revenues	41,064	0	53,962	0
Management fees | Ares Management L.P | Operating segment | Strategic Initiatives
Segment reporting
Total revenues	16,544	13,320	48,963	13,320
Other fees | OMG
Segment reporting
Total revenues	3,446	0	3,446	0
Other fees | Total
Segment reporting
Total revenues	13,297	4,911	27,352	12,921
Other fees | Ares Management L.P | Operating segment
Segment reporting
Total revenues	9,851	4,911	23,906	12,921
Other fees | Ares Management L.P | Operating segment | Credit Group
Segment reporting
Total revenues	5,798	4,898	18,494	12,057
Other fees | Ares Management L.P | Operating segment | Private Equity Group
Segment reporting
Total revenues	370	2	726	142
Other fees | Ares Management L.P | Operating segment | Real Estate Group
Segment reporting
Total revenues	3,681	5	4,604	716
Other fees | Ares Management L.P | Operating segment | Secondary Solutions Group
Segment reporting
Total revenues	0	0	0	0
Other fees | Ares Management L.P | Operating segment | Strategic Initiatives
Segment reporting
Total revenues	$ 2	$ 6	$ 82	$ 6