CONSOLIDATION (Balance Sheet) (Details) - USD ($) $ / shares in Units, $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Assets
Total assets	$ 13,216,929	$ 12,014,196
Liabilities
Operating lease liabilities	169,828
Total liabilities	11,241,333	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 March 31, 2020 and December 31, 2019)	298,761	298,761
Additional paid-in-capital	746,595	525,244
Retained earnings	(138,371)	(50,820)
Accumulated other comprehensive loss, net of tax	(10,849)	(6,047)
Total stockholders' equity	898,612	768,290
Total equity	1,975,596	1,858,598	$ 1,842,782	$ 1,602,324	$ 1,479,824	$ 1,394,341
Total liabilities, non-controlling interests and equity	$ 13,216,929	$ 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)	247,574,364	115,243,029
Class A common stock
Stockholders' Equity
Common stock	$ 1,324	$ 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)	132,373,743	115,242,028
Common stock, shares outstanding (in shares)	132,373,743	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	$ 1,152	$ 0
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)	115,199,621	1
Common stock, shares outstanding (in shares)	115,199,621	1
Eliminations
Assets
Total assets	$ (168,872)	$ (193,557)
Liabilities
Total liabilities	(49,977)	(36,874)
Commitments and contingencies
Stockholders' Equity
Total equity	(118,895)	(156,683)
Total liabilities, non-controlling interests and equity	(168,872)	(193,557)
Consolidated Funds
Assets
Cash and cash equivalents	514,401	606,321
Investments, at fair value	9,094,565	8,727,947
Due from affiliates	6,192	6,192
Other assets	28,179	30,081
Receivable for securities sold	355,149	88,809
Liabilities
Accounts payable, accrued expenses and other liabilities	72,486	61,857
Due to affiliates	0	0
Payable for securities purchased	796,316	500,146
CLO loan obligations, at fair value	8,354,458	7,973,748
Fund borrowings	35,440	107,244
Non-controlling interest in Consolidated Funds	562,818	618,020
Consolidated Funds | Reportable legal entity
Assets
Cash and cash equivalents	514,401	606,321
Investments, at fair value	9,086,469	8,723,169
Due from affiliates	6,192	6,192
Other assets	28,179	30,081
Receivable for securities sold	355,149	88,809
Total assets	9,990,390	9,454,572
Liabilities
Accounts payable, accrued expenses and other liabilities	72,486	61,857
Due to affiliates	14,382	11,700
Payable for securities purchased	796,316	500,146
CLO loan obligations, at fair value	8,390,053	7,998,922
Fund borrowings	35,440	107,244
Total liabilities	9,308,677	8,679,869
Commitments and contingencies
Non-controlling interest in Consolidated Funds	681,713	774,703
Stockholders' Equity
Total equity	681,713	774,703
Total liabilities, non-controlling interests and equity	9,990,390	9,454,572
Consolidated Funds | Eliminations
Assets
Cash and cash equivalents	0	0
Investments, at fair value	8,096	4,778
Due from affiliates	0	0
Other assets	0	0
Receivable for securities sold	0	0
Liabilities
Accounts payable, accrued expenses and other liabilities	0	0
Due to affiliates	(14,382)	(11,700)
Payable for securities purchased	0	0
CLO loan obligations, at fair value	(35,595)	(25,174)
Fund borrowings	0	0
Non-controlling interest in Consolidated Funds	(118,895)	(156,683)
AOG
Liabilities
Non-controlling interest in Ares Operating Group entities	514,166	472,288
AOG | Reportable legal entity
Liabilities
Non-controlling interest in Ares Operating Group entities	514,166	472,288
AOG | Eliminations
Liabilities
Non-controlling interest in Ares Operating Group entities	0	0
Ares Management L.P
Assets
Cash and cash equivalents	1,167,673	138,384
Investments, at fair value	1,190,604	1,663,664
Due from affiliates	288,030	268,099
Other assets	426,911	341,293
Right-of-use operating lease assets	145,225	143,406
Liabilities
Accounts payable, accrued expenses and other liabilities	90,613	88,173
Accrued compensation	69,702	37,795
Due to affiliates	73,050	71,445
Performance related compensation payable	532,665	829,764
Debt obligations	1,046,775	316,609
Operating lease liabilities	169,828	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 March 31, 2020 and December 31, 2019)	298,761	298,761
Additional paid-in-capital	746,595	525,244
Retained earnings	(138,371)	(50,820)
Accumulated other comprehensive loss, net of tax	(10,849)	(6,047)
Total stockholders' equity	898,612	768,290
Ares Management L.P | Class A common stock
Stockholders' Equity
Common stock	1,324	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	1,152	0
Ares Management L.P | Accrued Interest
Assets
Investments, at fair value	747,363	1,134,967
Ares Management L.P | Reportable legal entity
Assets
Cash and cash equivalents	1,167,673	138,384
Investments, at fair value	1,345,094	1,845,520
Due from affiliates	308,566	282,197
Other assets	428,853	343,674
Right-of-use operating lease assets	145,225	143,406
Total assets	3,395,411	2,753,181
Liabilities
Accounts payable, accrued expenses and other liabilities	90,613	88,173
Accrued compensation	69,702	37,795
Due to affiliates	73,050	71,445
Performance related compensation payable	532,665	829,764
Debt obligations	1,046,775	316,609
Operating lease liabilities	169,828	168,817
Total liabilities	1,982,633	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 March 31, 2020 and December 31, 2019)	298,761	298,761
Additional paid-in-capital	746,595	525,244
Retained earnings	(138,371)	(50,820)
Accumulated other comprehensive loss, net of tax	(10,849)	(6,047)
Total stockholders' equity	898,612	768,290
Total equity	1,412,778	1,240,578
Total liabilities, non-controlling interests and equity	3,395,411	2,753,181
Ares Management L.P | Reportable legal entity | Class A common stock
Stockholders' Equity
Common stock	1,324	1,152
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		0
Ares Management L.P | Eliminations
Assets
Cash and cash equivalents	0	0
Investments, at fair value	(154,490)	(181,856)
Due from affiliates	(20,536)	(14,098)
Other assets	(1,942)	(2,381)
Liabilities
Accounts payable, accrued expenses and other liabilities	0	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 March 31, 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	$ 0