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Supplemental Information on Oil and Natural Gas Producing Activities (Unaudited) - Costs Incurred in Oil and Natural Gas Property Acquisition, Exploration and Development (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Dec. 31, 2018	Dec. 31, 2017
Successor
Acquisitions of properties
Proved	$ 5,142		$ 30,641	$ 7,092
Unproved	5,491		4,197	91,139
Exploration	0		1,940	8,850
Development	27,429		158,361	187,264
Total cost incurred	$ 38,062		$ 195,139	$ 294,345
Predecessor
Acquisitions of properties
Proved		$ 3,897
Unproved		1,899
Exploration		1,234
Development		149,924
Total cost incurred		$ 156,954

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Costs incurred, including capitalized costs and costs charged to expense, associated with the acquisition of oil and gas properties that have proved reserves.

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Costs incurred, including capitalized costs and costs charged to expense, associated with the acquisition of oil and gas properties that have unproved reserves.

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Development costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities.

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Exploration costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities.

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Amount of costs incurred related to oil and gas property acquisition, exploration and development activities, including capitalized costs and costs charged to expense.

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