The capitalized costs incurred during the period (excluded from amortization) to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties.

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The capitalized costs incurred (excluded from amortization), as of the date of the balance sheet, to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties.

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The sum of the capitalized costs incurred, as of the balance sheet date, of unproved properties excluded from amortization including acquisition costs, exploration costs, development costs, and production costs.

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The capitalized costs incurred during the period (excluded from amortization) in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. Exploration costs also include costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, the maintenance of land and lease records, dry hole contributions and bottom hole contributions, costs of drilling and equipping exploratory wells and costs of drilling exploratory-type stratigraphic test wells.

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Property, Plant and Equipment - Summary of Oil and Natural Gas Property Costs Not Being Amortized (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Capitalized Costs Of Unproved Properties Excluded From Amortization [Line Items]
Total unproved properties, not subject to amortization	$ 219,055	$ 254,994
United States
Capitalized Costs Of Unproved Properties Excluded From Amortization [Line Items]
Acquisition	46,757
Exploration	62,038
Mexico
Capitalized Costs Of Unproved Properties Excluded From Amortization [Line Items]
Exploration	110,260
Total unproved properties, not subject to amortization	110,300	$ 121,700
2021
Capitalized Costs Of Unproved Properties Excluded From Amortization [Line Items]
Total unproved properties, not subject to amortization	18,978
2021 \| United States
Capitalized Costs Of Unproved Properties Excluded From Amortization [Line Items]
Exploration	16,242
2021 \| Mexico
Capitalized Costs Of Unproved Properties Excluded From Amortization [Line Items]
Exploration	2,736
2020
Capitalized Costs Of Unproved Properties Excluded From Amortization [Line Items]
Total unproved properties, not subject to amortization	62,752
2020 \| United States
Capitalized Costs Of Unproved Properties Excluded From Amortization [Line Items]
Acquisition	37,704
Exploration	11,195
2020 \| Mexico
Capitalized Costs Of Unproved Properties Excluded From Amortization [Line Items]
Exploration	13,853
2019
Capitalized Costs Of Unproved Properties Excluded From Amortization [Line Items]
Total unproved properties, not subject to amortization	82,835
2019 \| United States
Capitalized Costs Of Unproved Properties Excluded From Amortization [Line Items]
Acquisition	3,216
Exploration	31,111
2019 \| Mexico
Capitalized Costs Of Unproved Properties Excluded From Amortization [Line Items]
Exploration	48,508
2018 and Prior
Capitalized Costs Of Unproved Properties Excluded From Amortization [Line Items]
Total unproved properties, not subject to amortization	54,490
2018 and Prior \| United States
Capitalized Costs Of Unproved Properties Excluded From Amortization [Line Items]
Acquisition	5,837
Exploration	3,490
2018 and Prior \| Mexico
Capitalized Costs Of Unproved Properties Excluded From Amortization [Line Items]
Exploration	$ 45,163