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Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Oil and natural gas properties:    
Subject to depletion $ 4,065,159 $ 8,799,840
Not subject to depletion 3,324,525 2,472,284
Oil and natural gas properties, successful efforts method 7,389,684 11,272,124
Less accumulated depreciation and depletion 0 (2,117,963)
Total oil and natural gas properties, net 7,389,684 9,154,161
Other property, plant and equipment 239,119 219,857
Less accumulated depreciation (54,879) (49,551)
Other property, plant and equipment, net 184,240 170,306
Total property, plant and equipment, net 7,573,924 9,324,467
Incurred in 2020    
Oil and natural gas properties:    
Not subject to depletion 1,749,347 0
Incurred in 2019    
Oil and natural gas properties:    
Not subject to depletion 107,364 318,190
Incurred in 2018 and prior    
Oil and natural gas properties:    
Not subject to depletion $ 1,467,814 $ 2,154,094