Suspended Exploratory Well Costs - Schedule Of Changes In Capitalized Exploratory Well Costs (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Capitalized Exploratory Well Costs [Abstract]
Capitalized Exploratory Well Costs, Beginning Balance	$ 7,709	$ 0
Capitalized Exploratory Well Cost, Additions Pending Determination of Proved Reserves	6,329	7,709
Reclassification to Well, Facilities, and Equipment Based on Determination of Proved Reserves	(14,038)	0
Capitalized Exploratory Well Cost, Charged to Expense	0	0
Capitalized Exploratory Well Costs, Ending Balance	0	7,709
Capitalized Exploratory Well Costs that Have Been Capitalized for Period of One Year or Less	0	7,709
Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year	$ 0	$ 0