RELATED-PARTY TRANSACTIONS - Additional Information (Details) - USD ($)		3 Months Ended
	Oct. 01, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Administrative services reimbursement payable		$ 400,000		$ 200,000
Affiliates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Reimbursable expenses payable	$ 750,000
Termination period (in days)	90 days
Administrative expenses		200,000	$ 0
Rent expense			1,400,000
Oaktree Capital Group Excluding Consolidated Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest income		3,000	23,000
Oaktree Capital Group Excluding Consolidated Funds | Affiliates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Management fees and incentive income		$ 3,300,000	$ 242,800,000