CONSOLIDATION (Balance Sheet) (Details) - USD ($) $ / shares in Units, $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Assets
Total assets	$ 14,928,993			$ 12,014,196
Liabilities
Operating lease liabilities	161,737
Total liabilities	12,458,673			10,155,598
Commitments and contingencies
Stockholders' Equity
Series A Preferred Stock, $0.01 par value, 1,000,000,000 shares authorized (12,400,000 shares issued and outstanding at September 30, 2020 and December 31, 2019)	298,761			298,761
Additional paid-in-capital	1,011,697			525,244
Retained earnings	(164,084)			(50,820)
Accumulated other comprehensive loss, net of tax	(6,787)			(6,047)
Total stockholders' equity	1,142,171			768,290
Total equity	2,370,881	$ 2,003,748	$ 1,975,596	1,858,598	$ 1,842,782	$ 1,602,324	$ 1,479,824	$ 1,394,341
Total liabilities, redeemable interest, non-controlling interests and equity	$ 14,928,993			$ 12,014,196
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)	12,400,000			12,400,000
Preferred stock, shares outstanding (in shares)	12,400,000			12,400,000
Common stock, shares outstanding (in shares)	258,446,513			115,243,029
Class A common stock
Stockholders' Equity
Common stock	$ 1,438			$ 1,152
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)	143,826,710			115,242,028
Common stock, shares outstanding (in shares)	143,826,710			115,242,028
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	$ 1,146			$ 0
Common stock, par value (in dollars per share)	$ 0.01			$ 0.01
Common stock, shares authorized (in shares)	499,999,000
Common stock, shares issued (in shares)	114,618,803			1
Common stock, shares outstanding (in shares)	114,618,803			1
Eliminations
Assets
Total assets	$ (183,163)			$ (193,557)
Liabilities
Total liabilities	(70,887)			(36,874)
Commitments and contingencies
Stockholders' Equity
Total equity	(112,276)			(156,683)
Total liabilities, redeemable interest, non-controlling interests and equity	(183,163)			(193,557)
Consolidated Funds
Assets
Cash and cash equivalents	365,185			606,321
Investments, at fair value	10,604,856			8,727,947
Due from affiliates	8,684			6,192
Other assets	36,336			30,081
Receivable for securities sold	197,518			88,809
Liabilities
Accounts payable, accrued expenses and other liabilities	51,454			61,857
Due to affiliates	0			0
Payable for securities purchased	684,591			500,146
CLO loan obligations, at fair value	9,608,127			7,973,748
Fund borrowings	162,733			107,244
Non-controlling interests in Consolidated Funds	537,101			618,020
Consolidated Funds | Reportable legal entity
Assets
Cash and cash equivalents	365,185			606,321
Investments, at fair value	10,600,408			8,723,169
Due from affiliates	18,203			6,192
Other assets	36,336			30,081
Receivable for securities sold	197,518			88,809
Total assets	11,217,650			9,454,572
Liabilities
Accounts payable, accrued expenses and other liabilities	51,454			61,857
Due to affiliates	14,560			11,700
Payable for securities purchased	684,591			500,146
CLO loan obligations, at fair value	9,654,935			7,998,922
Fund borrowings	162,733			107,244
Total liabilities	10,568,273			8,679,869
Commitments and contingencies
Non-controlling interests in Consolidated Funds	649,377			774,703
Stockholders' Equity
Total equity	649,377			774,703
Total liabilities, redeemable interest, non-controlling interests and equity	11,217,650			9,454,572
Consolidated Funds | Eliminations
Assets
Cash and cash equivalents	0			0
Investments, at fair value	4,448			4,778
Due from affiliates	(9,519)			0
Other assets	0			0
Receivable for securities sold	0			0
Liabilities
Accounts payable, accrued expenses and other liabilities	0			0
Due to affiliates	(14,560)			(11,700)
Payable for securities purchased	0			0
CLO loan obligations, at fair value	(46,808)			(25,174)
Fund borrowings	0			0
Non-controlling interests in Consolidated Funds	(112,276)			(156,683)
AOG
Liabilities
Redeemable interest in Ares Operating Group entities	99,439			0
Non-controlling interests in Ares Operating Group entities	691,609			472,288
AOG | Reportable legal entity
Liabilities
Non-controlling interests in Ares Operating Group entities	691,609			472,288
AOG | Eliminations
Liabilities
Non-controlling interests in Ares Operating Group entities	0			0
Ares Management L.P
Assets
Cash and cash equivalents	868,752			138,384
Investments, at fair value	1,601,916			1,663,664
Due from affiliates	328,059			268,099
Other assets	781,295			341,293
Right-of-use operating lease assets	136,392			143,406
Liabilities
Accounts payable, accrued expenses and other liabilities	126,113			88,173
Accrued compensation	215,765			37,795
Due to affiliates	63,853			71,445
Performance related compensation payable	741,635			829,764
Debt obligations	642,665			316,609
Operating lease liabilities	161,737			168,817
Stockholders' Equity
Series A Preferred Stock, $0.01 par value, 1,000,000,000 shares authorized (12,400,000 shares issued and outstanding at September 30, 2020 and December 31, 2019)	298,761			298,761
Additional paid-in-capital	1,011,697			525,244
Retained earnings	(164,084)			(50,820)
Accumulated other comprehensive loss, net of tax	(6,787)			(6,047)
Total stockholders' equity	1,142,171			768,290
Equity method investments	1,601,916			1,663,664
Ares Management L.P | Class A common stock
Stockholders' Equity
Common stock	1,438			1,152
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	1,146			0
Ares Management L.P | Reportable legal entity
Assets
Cash and cash equivalents	868,752			138,384
Investments, at fair value	1,761,000			1,845,520
Due from affiliates	347,067			282,197
Other assets	781,295			343,674
Right-of-use operating lease assets	136,392			143,406
Total assets	3,894,506			2,753,181
Liabilities
Accounts payable, accrued expenses and other liabilities	135,632			88,173
Accrued compensation	215,765			37,795
Due to affiliates	63,853			71,445
Performance related compensation payable	741,635			829,764
Debt obligations	642,665			316,609
Operating lease liabilities	161,737			168,817
Total liabilities	1,961,287			1,512,603
Commitments and contingencies
Stockholders' Equity
Series A Preferred Stock, $0.01 par value, 1,000,000,000 shares authorized (12,400,000 shares issued and outstanding at September 30, 2020 and December 31, 2019)	298,761			298,761
Additional paid-in-capital	1,011,697			525,244
Retained earnings	(164,084)			(50,820)
Accumulated other comprehensive loss, net of tax	(6,787)			(6,047)
Total stockholders' equity	1,142,171			768,290
Total equity	1,833,780			1,240,578
Total liabilities, redeemable interest, non-controlling interests and equity	3,894,506			2,753,181
Ares Management L.P | Reportable legal entity | Class A common stock
Stockholders' Equity
Common stock	1,438			1,152
Ares Management L.P | Reportable legal entity | Class C common stock
Stockholders' Equity
Common stock	1,146			0
Ares Management L.P | Eliminations
Assets
Cash and cash equivalents	0			0
Investments, at fair value	(159,084)			(181,856)
Due from affiliates	(19,008)			(14,098)
Other assets	0			(2,381)
Liabilities
Accounts payable, accrued expenses and other liabilities	(9,519)			0
Accrued compensation	0			0
Due to affiliates	0			0
Performance related compensation payable	0			0
Debt obligations	0			0
Stockholders' Equity
Series A Preferred Stock, $0.01 par value, 1,000,000,000 shares authorized (12,400,000 shares issued and outstanding at September 30, 2020 and December 31, 2019)	0			0
Accumulated other comprehensive loss, net of tax	0			0
Total stockholders' equity	0			0
Ares Management L.P | Eliminations  | Class A common stock
Stockholders' Equity
Common stock				$ 0
Ares Management L.P | AOG | Reportable legal entity
Liabilities
Redeemable interest in Ares Operating Group entities	$ 99,439