Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenues	$ 339,723	$ 411,609
Oil sales
Disaggregation of Revenue [Line Items]
Revenues	312,572	381,242
Natural gas sales
Disaggregation of Revenue [Line Items]
Revenues	1,917	3,669
CO2 sales and transportation fees
Disaggregation of Revenue [Line Items]
Revenues	10,686	13,422
Oil marketing revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 14,548	$ 13,276