Revenue (Schedule of Information on Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Revenue [Abstract]
Sale of crude oil	$ 647,559	$ 359,640	$ 579,030
Sale of gas	40,984	34,052	49,877
Revenue	$ 688,543	$ 393,692	$ 628,907

The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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