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Segment Information - Reconciliation of Segment Information, Revenue and Other Operating (Loss) Income (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Revenue, Major Customer [Line Items]        
Loss on Commodity Derivative Instruments $ (1,507,270) $ (168,834) $ (2,012,714) $ (116,995)
Other Operating Income 5,733 4,466 18,432 13,177
Total Revenue and Other Operating (Loss) Income (880,261) 66,075 (534,399) 631,275
Operating Segments        
Revenue, Major Customer [Line Items]        
Total Segment Revenue from Contracts with External Customers $ 621,276 $ 230,443 $ 1,459,883 $ 735,093