REVENUE FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Surface revenue (non ASC 606 revenues)	$ 11	$ 265	$ 872	$ 290
Real estate contracts (non ASC 606 revenues)	3,529	3,630	7,241	6,743
Total revenues	88,735	111,774	218,130	206,950
Sourced water gathering
Disaggregation of Revenue [Line Items]
ASC 606 revenues	4,888	32,585	35,655	57,481
Produced water gathering and disposal
Disaggregation of Revenue [Line Items]
ASC 606 revenues	68,498	65,638	149,846	124,416
Crude oil gathering
Disaggregation of Revenue [Line Items]
ASC 606 revenues	7,309	6,071	15,086	11,983
Natural gas gathering
Disaggregation of Revenue [Line Items]
ASC 606 revenues	$ 4,500	$ 3,585	$ 9,430	$ 6,037