Quarterly report pursuant to Section 13 or 15(d)

SUBSEQUENT EVENTS (Details)

v3.10.0.1
SUBSEQUENT EVENTS (Details) - Subsequent Event
$ in Thousands
Jul. 27, 2018
USD ($)
shares
Jul. 17, 2018
USD ($)
agreement
shares
Pivotal Entities    
Subsequent Event [Line Items]    
Number of purchase and sale agreements | agreement   2
Business acquisition, equity interest issued or issuable, number of shares (in shares)   25,753,578
Pivotal Entities | Maximum    
Subsequent Event [Line Items]    
Business acquisition, equity interest issued or issuable, number of shares (in shares)   16,046,421
Pivotal Williston Basin, LP    
Subsequent Event [Line Items]    
Consideration transferred | $   $ 15,750
Business acquisition, equity interest issued or issuable, number of shares (in shares)   5,930,100
Pivotal Williston Basin II, LP    
Subsequent Event [Line Items]    
Consideration transferred | $   $ 52,650
Business acquisition, equity interest issued or issuable, number of shares (in shares)   19,823,478
WR Operating LLC    
Subsequent Event [Line Items]    
Consideration transferred | $ $ 100,000  
Business acquisition, equity interest issued or issuable, number of shares (in shares) 56,371,899  
Contingent shares threshold percentage 19.90%  
WR Operating LLC | Maximum    
Subsequent Event [Line Items]    
Business acquisition, equity interest issued or issuable, number of shares (in shares) 2,669,937