PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 1,026,212,000		$ 1,026,212,000		$ 930,768,000
Less: accumulated depreciation, amortization and accretion	(90,456,000)		(90,456,000)		(61,132,000)
Land	85,826,000		85,826,000		86,072,000
Total property, plant and equipment, net	1,021,582,000		1,021,582,000		955,708,000
Property, plant and equipment, assets	71,900,000		71,900,000		138,600,000
Depreciation expense	8,900,000	$ 8,700,000	29,400,000	$ 24,900,000
Impairment charges	0	$ 0	0	$ 0
Produced water disposal systems
Property, Plant and Equipment [Line Items]
Property, plant and equipment	669,825,000		$ 669,825,000		600,797,000
Crude oil gathering systems
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives (in years)			30 years
Property, plant and equipment	133,203,000		$ 133,203,000		129,658,000
Natural gas gathering and compression systems
Property, Plant and Equipment [Line Items]
Property, plant and equipment	111,830,000		$ 111,830,000		98,426,000
Sourced water gathering
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives (in years)			30 years
Property, plant and equipment	$ 111,354,000		$ 111,354,000		$ 101,887,000
Minimum | Produced water disposal systems
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives (in years)			10 years
Minimum | Natural gas gathering and compression systems
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives (in years)			10 years
Maximum | Produced water disposal systems
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives (in years)			30 years
Maximum | Natural gas gathering and compression systems
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives (in years)			30 years