RELATED-PARTY TRANSACTIONS - Additional Information (Details) - USD ($)			3 Months Ended		9 Months Ended
	Aug. 03, 2020	Oct. 01, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	May 19, 2020	Dec. 31, 2019
Oaktree Opportunities Fund XI, L.P.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Capital commitment	$ 750,000,000				$ 750,000,000
Contributions of committed capital			$ 37,500,000
Revolving credit facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Credit facility							$ 250,000,000
Borrowings under credit facilities			0		0
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		600,000	$ 0
Administrative services reimbursement payable			800,000		800,000			$ 200,000
Rent expense				$ 1,100,000		3,400,000
Oaktree Capital Group Excluding Consolidated Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest income			2,000	18,000	7,000	66,000
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			$ 1,500,000	$ 184,700,000	$ 46,800,000	$ 719,300,000