INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax [Line Items]
Deferred tax assets, valuation allowance	$ 135,000
Increase of net deferred tax assets	62,500
Deferred tax benefit associated with release of validation allowance		$ 8,200
Provisional deferred tax expense under the Act			$ 1,800
Preferred Unit limited partners
Income Tax [Line Items]
Income tax benefit (expense) attributable to noncontrolling interest	(205,844)	891	0
Redeemable Common Stock
Income Tax [Line Items]
Income tax benefit (expense) attributable to noncontrolling interest	1,879	$ 0	$ 0
Domestic Tax Authority
Income Tax [Line Items]
Operating loss carryforwards	$ 127,400