Annual report pursuant to Section 13 and 15(d)

Acquisitions And Divestitures - Narrative (Details)

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Acquisitions And Divestitures - Narrative (Details)
$ in Thousands, shares in Millions
 1 Months Ended 12 Months Ended
Jul. 03, 2019
USD ($)
Feb. 17, 2017
USD ($)
a
shares
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Business Acquisition [Line Items]              
Royalty interests $ 9,200            
Contingent payments 2 years            
Asset retirement obligation liabilities removed         $ 30,000    
Non-operated interests         48,527 $ 5,114 $ 4,866
Proceeds from Operating Activities         7,000    
Acquisition costs         $ 0 $ 0 2,392
Utica Shale              
Business Acquisition [Line Items]              
Non-operated interests     $ 29,000        
Vitruvian              
Business Acquisition [Line Items]              
Net surface area acquired (in acres) | a   46,400          
Total initial price   $ 1,850,000          
Payments to acquire businesses   $ 1,350,000          
Equity interest issued or issuable, number of shares (in shares) | shares   23.9          
Acquisition costs             $ 2,392
Vitruvian | Indemnity Escrow              
Business Acquisition [Line Items]              
Equity interest issued or issuable, number of shares (in shares) | shares   5.2          
Disposal Group, Disposed of by Sale, Not Discontinued Operations              
Business Acquisition [Line Items]              
Disposal Group, Including Discontinued Operation, Operating Expense       $ 19,700