Quarterly report pursuant to Section 13 or 15(d)

Asset Retirement Obligations (Details)

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Asset Retirement Obligations (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Asset Retirement Obligations        
Asset retirement obligations - beginning of period     $ 58,979  
Obligations settled     (153)  
Obligations incurred for wells drilled and producing properties acquired     807  
Accretion expense $ 918 $ 700 1,894 $ 1,390
Effect of deconsolidation of Antero Midstream Partners LP     (7,518)  
Asset retirement obligations - end of period $ 54,009   $ 54,009