SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Condensed Consolidated Statement of Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 84,475	$ 91,875	$ 74,878	$ 121,576	$ 16,337	$ 47,212	$ 14,169	$ 74,421	$ 372,804	$ 152,139	$ 172,911
Net cash used in operating activities									(2,083,021)	(1,417,058)	(1,863,014)
Consolidated Funds
Cash flows from operating activities:
Change in other liabilities and payables held at Consolidated Funds									88,467	137,545	85,654
ASC 606 | Adjustments
Cash flows from operating activities:
Net income										18,552
Net cash used in operating activities										0
ASC 606 | Balances without adoption of ASC 606
Cash flows from operating activities:
Net income										170,691
Net cash used in operating activities										(1,417,058)
ASC 606 | Consolidated Funds | Adjustments
Cash flows from operating activities:
Change in other liabilities and payables held at Consolidated Funds										1,921
ASC 606 | Consolidated Funds | Balances without adoption of ASC 606
Cash flows from operating activities:
Change in other liabilities and payables held at Consolidated Funds										139,466
Ares Management L.P
Cash flows from operating activities:
Other assets									$ 27,653	(66,795)	$ (36,786)
Ares Management L.P | ASC 606 | Adjustments
Cash flows from operating activities:
Other assets										20,473
Ares Management L.P | ASC 606 | Balances without adoption of ASC 606
Cash flows from operating activities:
Other assets										$ (87,268)