REVENUE FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018		Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Surface revenue (non ASC 606 revenues)									$ 904	$ 875		$ 881
Real estate contracts (non ASC 606 revenues)									14,229	11,779		0
Total revenues	$ 125,308	$ 115,415	$ 111,774	$ 95,176	$ 51,503	$ 49,301	$ 49,788	$ 33,875	447,673	184,467	[1]	39,295	[1]
Sourced water gathering
Disaggregation of Revenue [Line Items]
ASC 606 revenues									115,135	76,976		0
Produced water gathering and disposal
Disaggregation of Revenue [Line Items]
ASC 606 revenues									275,882	72,352		27,864
Crude oil gathering
Disaggregation of Revenue [Line Items]
ASC 606 revenues									27,206	16,038		7,641
Natural gas gathering
Disaggregation of Revenue [Line Items]
ASC 606 revenues									$ 14,317	$ 6,447		$ 2,909

[1] See Note 1 for information regarding the basis of financial statement presentation.