COMMITMENTS AND CONTINGENCIES - Leases: Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Lessee, Lease, Description [Line Items]
Operating lease liabilities	$ 197,312
Finance lease obligations	528
Accumulated amortization	$ 1,700	$ 1,600
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accounts Payable and Accrued Liabilities	Accounts Payable and Accrued Liabilities
Ares Management L.P
Lessee, Lease, Description [Line Items]
Operating lease assets	$ 161,088	$ 167,652
Finance lease assets	859	1,011
Total lease assets	161,947	168,663
Operating lease liabilities	197,312	205,075
Finance lease obligations	528	936
Total lease liabilities	$ 197,840	$ 206,011
Minimum
Lessee, Lease, Description [Line Items]
Lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease term	11 years