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Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
2 Months Ended 10 Months Ended 12 Months Ended
Feb. 28, 2017
Dec. 31, 2017
Dec. 31, 2019
Dec. 31, 2018
Disaggregation of Revenue [Line Items]        
Revenues $ 79,832 $ 386,569 $ 597,403 $ 591,178
(Losses) gains on oil derivatives 12,886 (66,900) (44,955) 1,735
Other revenues 1,424 3,975 316 774
Total revenues and other 92,718 319,669 559,405 586,557
Oil sales        
Disaggregation of Revenue [Line Items]        
Revenues 54,110 303,589 543,634 520,979
Natural gas sales        
Disaggregation of Revenue [Line Items]        
Revenues 14,476 40,887 19,391 26,244
Natural gas liquids sales        
Disaggregation of Revenue [Line Items]        
Revenues 5,534 13,452 2,571 5,651
Electricity sales        
Disaggregation of Revenue [Line Items]        
Revenues 3,655 21,972 29,397 35,208
Marketing revenues        
Disaggregation of Revenue [Line Items]        
Revenues 633 2,694 2,094 2,322
Oil        
Disaggregation of Revenue [Line Items]        
(Losses) gains on oil derivatives $ 12,886 $ (66,900) $ (37,998) $ (4,621)