Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income	$ 134,650	$ (52,705)
Retained Earnings (Accumulated Deficit)	(225,997)		$ (189,440)
Revenues	93,929	188,365
General and administrative	5,090	6,526
Decrease in operating costs	(44,036)	(112,100)
Net loss attributable to non-controlling interests (Note 15)	0	(5,828)
Intersegment Eliminations
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	0	(11,297)
General and administrative	0	611
Decrease in operating costs	0	11,908
Oil and natural gas
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	48,026	76,810
Decrease in operating costs	(17,164)	(23,475)
Oil and natural gas | Intersegment Eliminations
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	0	(10,772)
Decrease in operating costs	$ 0	$ 525