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Supplemental Oil and Gas Disclosures - Unaudited - Costs Incurred in Oil and Natural Gas Property Acquisition, Exploration and Development Activities (Detail) - USD ($) $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
	Dec. 31, 2020	Nov. 19, 2020	Dec. 31, 2019	Dec. 31, 2018
Acquisition costs:
Proved oil and gas properties	$ 0	$ 0	$ 0	$ 260,034
Unproved oil and gas properties	336	536	23,058	696,293
Exploration costs	105	1,225	67,470	53,928
Development costs	14,624	199,537	542,133	923,562
Asset retirement costs	35	181	2,083	5,804
Total costs incurred	$ 15,100	$ 201,479	$ 634,744	$ 1,939,621

X

- Definition

Cost incurred, including capitalized costs and costs charged to expense, in acquisition of oil and gas properties.

+ References

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-Name Accounting Standards Codification
-Topic 932
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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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Amount of asset retirement obligations (ARO) costs incurred (whether capitalized or charged to expense) during the period.

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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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