REVENUE FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Surface revenue (non ASC 606 revenues)	$ 15	$ 174	$ 887	$ 464
Real estate contracts (non ASC 606 revenues)	3,464	3,709	10,705	10,452
Total revenues	96,539	115,415	314,669	322,365
Sourced water gathering
Disaggregation of Revenue [Line Items]
ASC 606 revenues	12,653	26,485	48,308	83,966
Produced water gathering and disposal
Disaggregation of Revenue [Line Items]
ASC 606 revenues	67,800	73,928	217,646	198,344
Crude oil gathering
Disaggregation of Revenue [Line Items]
ASC 606 revenues	7,531	7,248	22,617	19,231
Natural gas gathering
Disaggregation of Revenue [Line Items]
ASC 606 revenues	$ 5,076	$ 3,871	$ 14,506	$ 9,908