SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Condensed Consolidated Statement of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Expenses
Total expenses	$ 227,188	$ 254,127	$ 654,488	$ 1,193,791
Total other income	38,754	54,149	108,920	101,864
Income before taxes	52,343	88,424	165,461	12,916
Income tax expense (benefit)	5,131	4,552	29,659	(28,459)
Net income	47,212	83,872	135,802	41,375
Net income (loss) attributable to Ares Management, L.P.	15,910	27,838	45,083	36,582
Less: Preferred equity dividend paid	5,425	5,425	16,275	16,275
Net income attributable to Ares Management, L.P. common shareholders	10,485	22,413	28,808	20,307
Balances without adoption of ASC 606
Expenses
Less: Preferred equity dividend paid	5,425
Consolidated Funds
Expenses
Expenses of Consolidated Funds	12,833	19,039	49,261	27,472
Net realized and unrealized gain (loss) on investments	5,437	35,940	26,839	55,263
Income tax expense (benefit)	13	1,198	82	2,062
Net income attributable to non-controlling interests related to consolidated VIEs	13,169	18,195	23,418	25,403
Consolidated Funds | Balances without adoption of ASC 606
Expenses
Net income attributable to non-controlling interests related to consolidated VIEs	11,188
AOG
Expenses
Net income attributable to non-controlling interests related to consolidated VIEs	18,133	37,839	67,301	(20,610)
AOG | Balances without adoption of ASC 606
Expenses
Net income attributable to non-controlling interests related to consolidated VIEs	55,416
Ares Management L.P
Revenues
Total revenues	240,777	288,402	711,029	1,104,843
Expenses
Net realized and unrealized gain (loss) on investments	5,542	4,229	7,970	(1,471)
Interest and dividend income	808	1,761	6,511	5,147
Other income (expense), net	811	(2,492)	(1,487)	16,826
Income tax expense (benefit)	5,118	3,354	29,577	(30,521)
ASC 323 | As Previously Reported | Ares Management L.P
Revenues
Total revenues		283,671		1,059,218
Expenses
Net realized and unrealized gain (loss) on investments		7,209		39,943
Interest and dividend income		3,512		9,358
ASC 323 | Adjustments | Ares Management L.P
Revenues
Total revenues		4,731		45,625
Expenses
Net realized and unrealized gain (loss) on investments		(2,980)		(41,414)
Interest and dividend income		(1,751)		(4,211)
ASC 606 | Adjustments
Expenses
Total expenses	0		0
Total other income	5		5
Income before taxes	63,943		67,723
Income tax expense (benefit)	6,990		7,190
Net income	56,953		60,533
Net income (loss) attributable to Ares Management, L.P.	21,651		22,267
Net income attributable to Ares Management, L.P. common shareholders	21,651		22,267
ASC 606 | Balances without adoption of ASC 606
Expenses
Total expenses	227,188		654,488
Total other income	38,759		108,925
Income before taxes	116,286		233,184
Income tax expense (benefit)	12,121		36,849
Net income	104,165		196,335
Net income (loss) attributable to Ares Management, L.P.	37,561		67,350
Less: Preferred equity dividend paid			16,275
Net income attributable to Ares Management, L.P. common shareholders	32,136		51,075
ASC 606 | Consolidated Funds | Adjustments
Expenses
Expenses of Consolidated Funds	0		0
Net income attributable to non-controlling interests related to consolidated VIEs	(1,981)		(121)
ASC 606 | Consolidated Funds | Balances without adoption of ASC 606
Expenses
Expenses of Consolidated Funds	12,833		49,261
Net income attributable to non-controlling interests related to consolidated VIEs			23,297
ASC 606 | AOG | Adjustments
Expenses
Net income attributable to non-controlling interests related to consolidated VIEs	37,283		38,387
ASC 606 | AOG | Balances without adoption of ASC 606
Expenses
Net income attributable to non-controlling interests related to consolidated VIEs			105,688
ASC 606 | Ares Management L.P | Adjustments
Revenues
Total revenues	63,938		67,718
Expenses
Other income (expense), net	5		5
ASC 606 | Ares Management L.P | Balances without adoption of ASC 606
Revenues
Total revenues	304,715		778,747
Expenses
Other income (expense), net	816		(1,482)
Performance fees | Ares Management L.P
Revenues
Total revenues		0		0
Performance fees | ASC 323 | As Previously Reported | Ares Management L.P
Revenues
Total revenues		87,008		480,204
Performance fees | ASC 323 | Adjustments | Ares Management L.P
Revenues
Total revenues		(87,008)		(480,204)
Carried interest allocation
Revenues
Total revenues			72,587
Carried interest allocation | Ares Management L.P
Revenues
Total revenues	31,902	82,534	72,587	468,349
Carried interest allocation | ASC 323 | As Previously Reported | Ares Management L.P
Revenues
Total revenues		0		0
Carried interest allocation | ASC 323 | Adjustments | Ares Management L.P
Revenues
Total revenues		82,534		468,349
Incentive fees | Ares Management L.P
Revenues
Total revenues	872	4,474	13,683	11,855
Incentive fees | ASC 323 | As Previously Reported | Ares Management L.P
Revenues
Total revenues		0		0
Incentive fees | ASC 323 | Adjustments | Ares Management L.P
Revenues
Total revenues		4,474		11,855
Incentive fees | ASC 606 | Ares Management L.P | Adjustments
Revenues
Total revenues	63,938		67,718
Incentive fees | ASC 606 | Ares Management L.P | Balances without adoption of ASC 606
Revenues
Total revenues	64,810		81,401
Principal investment income (loss) | Ares Management L.P
Revenues
Total revenues	$ (7,464)	4,731	$ (684)	45,625
Principal investment income (loss) | ASC 323 | As Previously Reported | Ares Management L.P
Revenues
Total revenues		0		0
Principal investment income (loss) | ASC 323 | Adjustments | Ares Management L.P
Revenues
Total revenues		$ 4,731		$ 45,625