COMMITMENTS AND CONTINGENCIES - Leases: Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Operating lease liabilities	$ 205,075
Finance lease obligations	936
Accumulated amortization	$ 1,600	$ 1,000
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	$ 167,652	$ 154,742
Finance lease assets	1,011	1,386
Total lease assets	168,663	156,128
Operating lease liabilities	205,075	180,236
Finance lease obligations	936	1,273
Total lease liabilities	$ 206,011	$ 181,509
Minimum
Lessee, Lease, Description [Line Items]
Lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease term	12 years