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Commitments And Contingencies (Details) - Carnero Gathering, Joint Venture - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Variable Interest Entity [Line Items]    
Earnout derivative liability $ 5.8  
Sanchez Energy    
Variable Interest Entity [Line Items]    
Earnout payments $ 32.1 $ 0.0