BUSINESS COMBINATIONS - Supplemental Information on Unaudited Pro Forma (Details) - USD ($) $ in Thousands	3 Months Ended		4 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2020
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Total revenues			$ 54,000
Net income attributable to Ares Management Corporation Class A and non-voting common stockholders			$ 26,800
Landmark Acquisition
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Total revenues	$ 948,719	$ 527,105		$ 2,966,540	$ 1,214,989
Net income attributable to Ares Management Corporation Class A and non-voting common stockholders	$ 87,542	$ 37,570		$ 257,361	$ 41,263