INCOME TAXES - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets
Net operating loss and other carryforwards (indefinite life)	$ 232	$ 0
Investment in the Operating Company	0	0
Other	0	0
Total deferred tax assets	232	0
Deferred tax liabilities
Investment in the Operating Company	8,059	0
Midstream assets	0	12,912
Other	0	0
Total deferred tax liabilities	8,059	12,912
Net deferred tax liabilities	$ 7,827	$ 12,912

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