RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Related Party Transaction [Line Items]
Revenue from related parties	$ 85,846	$ 104,866	$ 280,460	$ 296,508
Crude oil gathering
Related Party Transaction [Line Items]
Revenue from related parties	2,745	2,626	7,730	7,278
Natural gas gathering
Related Party Transaction [Line Items]
Revenue from related parties	5,076	3,870	14,506	9,908
Produced water gathering and disposal
Related Party Transaction [Line Items]
Revenue from related parties	66,067	72,917	211,353	196,213
Sourced water gathering
Related Party Transaction [Line Items]
Revenue from related parties	11,948	25,452	46,845	82,933
Surface revenue
Related Party Transaction [Line Items]
Revenue from related parties	$ 10	$ 1	$ 26	$ 176