CONSOLIDATION - Balance Sheet (Details) - USD ($) $ / shares in Units, $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Assets
Intangible assets, net	$ 798,690			$ 222,088
Total assets	19,934,398			15,168,992
Liabilities
Operating lease liabilities	214,681
Total liabilities	15,295,223			12,596,852
Commitments and contingencies
Stockholders' Equity
Series A Preferred Stock, $0.01 par value, 1,000,000,000 shares authorized (zero and 12,400,000 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively)	0			298,761
Additional paid-in-capital	1,881,913			1,043,669
Retained earnings	(128,981)			(151,824)
Accumulated other comprehensive loss, net of tax	(2,571)			483
Total stockholders' equity	1,753,260			1,193,685
Total equity	3,540,526	$ 3,441,115	$ 2,420,568	2,471,774	$ 2,370,881	$ 2,003,748	$ 1,975,596	$ 1,858,598
Total liabilities, redeemable interest, non-controlling interests and equity	$ 19,934,398			$ 15,168,992
Preferred stock, par value (in dollars per share)	$ 0.01			$ 0.01
Preferred stock, shares authorized (in shares)	1,000,000,000			1,000,000,000
Preferred stock, shares issued (in shares)	0			12,400,000
Preferred stock, shares outstanding (in shares)	0			12,400,000
Common stock, shares outstanding (in shares)	289,875,333			259,631,180
Class A Common Stock
Stockholders' Equity
Common stock	$ 1,676			$ 1,472
Common stock, par value (in dollars per share)	$ 0.01			$ 0.01
Common stock, shares authorized (in shares)	1,500,000,000			1,500,000,000
Common stock, shares issued (in shares)	167,581,165			147,182,562
Common stock, shares outstanding (in shares)	167,581,165			147,182,562
Non- voting Common Stock
Stockholders' Equity
Common stock	$ 35			$ 0
Common stock, par value (in dollars per share)	$ 0.01			$ 0.01
Common stock, shares authorized (in shares)	500,000,000			500,000,000
Common stock, shares issued (in shares)	3,489,911			0
Common stock, shares outstanding (in shares)	3,489,911			0
Class B Common Stock
Stockholders' Equity
Common stock	$ 0			$ 0
Common stock, par value (in dollars per share)	$ 0.01			$ 0.01
Common stock, shares authorized (in shares)	1,000			1,000
Common stock, shares issued (in shares)	1,000			1,000
Common stock, shares outstanding (in shares)	1,000			1,000
Class C Common Stock
Stockholders' Equity
Common stock	$ 1,188			$ 1,124
Common stock, par value (in dollars per share)	$ 0.01			$ 0.01
Common stock, shares authorized (in shares)	499,999,000			499,999,000
Common stock, shares issued (in shares)	118,803,257			112,447,618
Common stock, shares outstanding (in shares)	118,803,257			112,447,618
Eliminations
Assets
Total assets	$ (511,267)			$ (408,733)
Liabilities
Total liabilities	(88,354)			(84,888)
Commitments and contingencies
Stockholders' Equity
Total equity	(422,913)			(323,845)
Total liabilities, redeemable interest, non-controlling interests and equity	(511,267)			(408,733)
Consolidated Funds
Assets
Cash and cash equivalents	1,581,433			522,377
U.S. Treasury securities, at fair value	1,000,165			0
Investments, at fair value	10,360,854			10,877,097
Due from affiliates	9,059			17,172
Receivable for securities sold	187,230			121,225
Other assets	47,806			35,502
Liabilities
Accounts payable, accrued expenses and other liabilities	89,685			46,824
Due to affiliates	0			0
Payable for securities purchased	863,007			514,946
CLO loan obligations, at fair value	10,174,794			9,958,076
Fund borrowings	99,240			121,909
Redeemable interest	1,000,000	916,824	930,924	0
Non-controlling interests in Consolidated Funds	464,400			539,720
Consolidated Funds | Reportable legal entity
Assets
Cash and cash equivalents	1,581,433			522,377
U.S. Treasury securities, at fair value	1,000,165
Investments, at fair value	10,356,640			10,873,522
Due from affiliates	19,089			27,377
Receivable for securities sold	187,230			121,225
Other assets	47,806			35,502
Total assets	13,192,363			11,580,003
Liabilities
Accounts payable, accrued expenses and other liabilities	102,883			46,824
Due to affiliates	19,880			16,770
Payable for securities purchased	863,007			514,946
CLO loan obligations, at fair value	10,220,040			10,015,989
Fund borrowings	99,240			121,909
Total liabilities	11,305,050			10,716,438
Commitments and contingencies
Redeemable interest	1,000,000
Non-controlling interests in Consolidated Funds	887,313			863,565
Stockholders' Equity
Total equity	887,313			863,565
Total liabilities, redeemable interest, non-controlling interests and equity	13,192,363			11,580,003
Consolidated Funds | Eliminations
Assets
Investments, at fair value	4,214			3,575
Due from affiliates	(10,030)			(10,205)
Liabilities
Accounts payable, accrued expenses and other liabilities	(13,198)
Due to affiliates	(19,880)			(16,770)
CLO loan obligations, at fair value	(45,246)			(57,913)
Non-controlling interests in Consolidated Funds	(422,913)			(323,845)
Ares Operating Group
Liabilities
Redeemable interest	98,649	$ 100,031	$ 99,808	100,366
Non-controlling interests in Ares Operating Group entities	1,322,866			738,369
Ares Operating Group | Reportable legal entity
Liabilities
Non-controlling interests in Ares Operating Group entities	1,322,866			738,369
Ares Management L.P
Assets
Cash and cash equivalents	295,704			539,812
Total investments	3,322,665			1,682,759
Due from affiliates	493,411			405,887
Other assets	1,006,870			590,332
Intangible assets, net	1,452,690			222,087
Right-of-use operating lease assets	176,511			154,742
Liabilities
Accounts payable, accrued expenses and other liabilities	208,141			115,289
Accrued compensation	309,569			103,010
Due to affiliates	202,438			100,186
Performance related compensation payable	1,895,343			813,378
Debt obligations	1,238,325			642,998
Operating lease liabilities	214,681			180,236
Stockholders' Equity
Series A Preferred Stock, $0.01 par value, 1,000,000,000 shares authorized (zero and 12,400,000 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively)	0			298,761
Additional paid-in-capital	1,881,913			1,043,669
Retained earnings	(128,981)			(151,824)
Accumulated other comprehensive loss, net of tax	(2,571)			483
Total stockholders' equity	1,753,260			1,193,685
Ares Management L.P | Carried interest
Stockholders' Equity
Equity method investments:	2,625,319			1,145,853
Ares Management L.P | Class A Common Stock
Stockholders' Equity
Common stock	1,676			1,472
Ares Management L.P | Non- voting Common Stock
Stockholders' Equity
Common stock	35
Ares Management L.P | Class B Common Stock
Stockholders' Equity
Common stock	0			0
Ares Management L.P | Class C Common Stock
Stockholders' Equity
Common stock	1,188			1,124
Ares Management L.P | Reportable legal entity
Assets
Cash and cash equivalents	295,704			539,812
Total investments	3,804,023			2,064,517
Due from affiliates	517,504			426,021
Other assets	1,006,870			590,543
Intangible assets, net	1,452,690			222,087
Right-of-use operating lease assets	176,511			154,742
Total assets	7,253,302			3,997,722
Liabilities
Accounts payable, accrued expenses and other liabilities	218,171			125,494
Accrued compensation	309,569			103,010
Due to affiliates	202,438			100,186
Performance related compensation payable	1,895,343			813,378
Debt obligations	1,238,325			642,998
Operating lease liabilities	214,681			180,236
Total liabilities	4,078,527			1,965,302
Commitments and contingencies
Stockholders' Equity
Series A Preferred Stock, $0.01 par value, 1,000,000,000 shares authorized (zero and 12,400,000 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively)	0			298,761
Additional paid-in-capital	1,881,913			1,043,669
Retained earnings	(128,981)			(151,824)
Accumulated other comprehensive loss, net of tax	(2,571)			483
Total stockholders' equity	1,753,260			1,193,685
Total equity	3,076,126			1,932,054
Total liabilities, redeemable interest, non-controlling interests and equity	7,253,302			3,997,722
Ares Management L.P | Reportable legal entity | Class A Common Stock
Stockholders' Equity
Common stock	1,676			1,472
Ares Management L.P | Reportable legal entity | Non- voting Common Stock
Stockholders' Equity
Common stock	35
Ares Management L.P | Reportable legal entity | Class B Common Stock
Stockholders' Equity
Common stock	0
Ares Management L.P | Reportable legal entity | Class C Common Stock
Stockholders' Equity
Common stock	1,188			1,124
Ares Management L.P | Eliminations
Assets
Total investments	(481,358)			(381,758)
Due from affiliates	(24,093)			(20,134)
Other assets				(211)
Liabilities
Accounts payable, accrued expenses and other liabilities	(10,030)			(10,205)
Ares Management L.P | Ares Operating Group | Reportable legal entity
Liabilities
Redeemable interest	$ 98,649			$ 100,366