SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Condensed Consolidated Statement of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Revenues
Total revenues	$ 266,089	$ 244,244
Other income (expense)
Total other income	2,240	56,635
Income (loss) before taxes	62,046	(190,588)
Income tax benefit	(12,375)	(34,264)
Net income (loss)	74,421	(156,324)
Net income (loss) attributable to Ares Management, L.P.	40,948	(41,134)
Net income (loss) attributable to Ares Management, L.P. common shareholders	35,523	(46,559)
Ares Management L.P
Revenues
Carried interest allocation	54,129	52,007
Incentive fees	5,071	3,165
Principal investment income	4,909	2,587
Total revenues	266,089	244,244
Other income (expense)
Net realized and unrealized gain (loss) on investments	(839)	888
Interest and dividend income	3,347	1,924
Other income (expense), net	(311)	16,496
Income tax benefit	(12,375)	(34,733)
Consolidated Funds
Other income (expense)
Net realized and unrealized gain (loss) on investments	(13,085)	32,036
Interest and dividend income	64,422	41,492
Income tax benefit	0	$ 469
ASC 323 | Ares Management L.P
Revenues
Performance fees			$ 0
Carried interest allocation			52,007
Incentive fees			3,165
Principal investment income			2,587
Total revenues			244,244
Other income (expense)
Net realized and unrealized gain (loss) on investments			888
Interest and dividend income			1,924
ASC 323 | As Previously Reported | Ares Management L.P
Revenues
Performance fees			55,172
Carried interest allocation			0
Incentive fees			0
Principal investment income			0
Total revenues			241,657
Other income (expense)
Net realized and unrealized gain (loss) on investments			2,655
Interest and dividend income			2,744
ASC 323 | Adjustments | Ares Management L.P
Revenues
Performance fees			(55,172)
Carried interest allocation			52,007
Incentive fees			3,165
Principal investment income			2,587
Total revenues			2,587
Other income (expense)
Net realized and unrealized gain (loss) on investments			(1,767)
Interest and dividend income			$ (820)
ASC 606 | Adjustments
Other income (expense)
Total other income	(12)
Income (loss) before taxes	844
Income tax benefit	250
Net income (loss)	594
Net income (loss) attributable to Ares Management, L.P.	594
Net income (loss) attributable to Ares Management, L.P. common shareholders	594
ASC 606 | Balances without adoption of ASC 606
Other income (expense)
Total other income	2,228
Income (loss) before taxes	62,890
Income tax benefit	(12,125)
Net income (loss)	75,015
Net income (loss) attributable to Ares Management, L.P.	41,542
Net income (loss) attributable to Ares Management, L.P. common shareholders	36,117
ASC 606 | Ares Management L.P | Adjustments
Revenues
Incentive fees	856
Total revenues	856
Other income (expense)
Other income (expense), net	(12)
ASC 606 | Ares Management L.P | Balances without adoption of ASC 606
Revenues
Incentive fees	5,927
Total revenues	266,945
Other income (expense)
Other income (expense), net	$ (323)