COMMITMENTS AND CONTINGENCIES (Leases: Assets and Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating lease liabilities	$ 169,828
Finance lease obligations	1,698
Accumulated amortization	700	$ 600
Ares Management L.P
Lessee, Lease, Description [Line Items]
Operating lease assets	145,225	143,406
Finance lease assets	1,756	1,787
Total lease assets	146,981	145,193
Operating lease liabilities	169,828	168,817
Finance lease obligations	1,698	1,651
Total lease liabilities	$ 171,526	$ 170,468
Minimum
Lessee, Lease, Description [Line Items]
Lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease term	10 years