UNITHOLDERS' CAPITAL - Changes in Company Ownership Interest (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Stockholders' Equity Note [Abstract]
Net income (loss) attributable to OCG Class A unitholders	$ 45,554	$ (16,648)	$ (20,784)	$ 73,050
Equity reallocation between controlling and non-controlling interests	(184)	267,715	1,829	304,280
Change from net income (loss) attributable to OCG Class A unitholders and transfers from non-controlling interests	$ 45,370	$ 251,067	$ (18,955)	$ 377,330