DEBT (Debt Issuance Costs) (Details) - Ares Management L.P $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Credit Facility
Debt Issuance Costs [Roll Forward]
Unamortized debt issuance costs as of December 31, 2017	$ 6,543
Debt issuance costs incurred	0
Amortization of debt issuance costs	(393)
Unamortized debt issuance costs as of March 31, 2018	6,150
Senior Notes
Debt Issuance Costs [Roll Forward]
Unamortized debt issuance costs as of December 31, 2017	1,571
Debt issuance costs incurred	0
Amortization of debt issuance costs	(63)
Unamortized debt issuance costs as of March 31, 2018	1,508
Term Loans
Debt Issuance Costs [Roll Forward]
Unamortized debt issuance costs as of December 31, 2017	1,171
Debt issuance costs incurred	19
Amortization of debt issuance costs	(32)
Unamortized debt issuance costs as of March 31, 2018	1,158
Repurchase Agreement Loan
Debt Issuance Costs [Roll Forward]
Unamortized debt issuance costs as of December 31, 2017	0
Debt issuance costs incurred	176
Amortization of debt issuance costs	(1)
Unamortized debt issuance costs as of March 31, 2018	$ 175