RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Related Party Transaction [Line Items]
Revenue from related parties	$ 78,031	$ 103,066	$ 194,614	$ 191,642
Crude oil
Related Party Transaction [Line Items]
Revenue from related parties	2,452	1,936	4,985	4,652
Gas gathering and compression
Related Party Transaction [Line Items]
Revenue from related parties	4,500	3,586	9,430	6,038
Produced water
Related Party Transaction [Line Items]
Revenue from related parties	66,185	64,784	145,286	123,296
Sourced water
Related Party Transaction [Line Items]
Revenue from related parties	4,894	32,585	34,897	57,481
Surface revenue
Related Party Transaction [Line Items]
Revenue from related parties	$ 0	$ 175	$ 16	$ 175