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Acquisitions and Divestitures (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Discontinued Operations and Disposal Groups [Abstract]    
Payments to Acquire Oil and Gas Property $ 67,000 $ 311,000
Gains (Losses) on Asset Dispositions, Net (41,283) 3,650
Proceeds on Asset Dispositions $ 188,943 $ 35,409