Quarterly report pursuant to Section 13 or 15(d)

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)

v3.19.3
BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
USD ($)
geographic_area
revenue_source
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
geographic_area
revenue_source
Sep. 30, 2018
USD ($)
Accounting Policies [Line Items]        
Change in prepaid expenses and other       $ 12.4
Number of revenue sources | revenue_source 2   2  
Number of geographic areas in which entity operates | geographic_area 1   1  
Oil        
Accounting Policies [Line Items]        
Sales $ 152.8 $ 135.0 $ 416.3 315.2
Natural Gas and NGL        
Accounting Policies [Line Items]        
Sales $ 5.2 $ 10.4 $ 24.3 $ 26.2