Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 411,609	$ 250,799
Oil sales
Disaggregation of Revenue [Line Items]
Revenues	381,242	233,044
Natural gas sales
Disaggregation of Revenue [Line Items]
Revenues	3,669	2,401
CO2 sales and transportation fees
Disaggregation of Revenue [Line Items]
Revenues	13,422	9,228
Oil marketing revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 13,276	$ 6,126