Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2020	Sep. 18, 2020	Dec. 31, 2021	Dec. 31, 2019
Disaggregation of Revenue
Revenues	$ 215,903	$ 521,693	$ 1,242,872	$ 1,260,360
Oil sales
Disaggregation of Revenue
Revenues	199,769	489,251	1,148,022	1,205,083
Natural gas sales
Disaggregation of Revenue
Revenues	1,339	2,850	11,933	6,937
CO2 sales and transportation fees
Disaggregation of Revenue
Revenues	9,419	21,049	44,175	34,142
Oil marketing revenues
Disaggregation of Revenue
Revenues	$ 5,376	$ 8,543	$ 38,742	$ 14,198