Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss	$ (52,705)	$ (591)
Retained earnings (deficit)	5,806		$ (41,071)
Non-controlling interests in consolidated subsidiaries	0		$ (212,271)
Revenues	188,365	120,897
General and administrative	6,526	6,289
Decrease in operating costs	(112,100)	(71,563)
Intersegment Eliminations
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	(11,297)	(9,412)
General and administrative	611	0
Decrease in operating costs	11,908	9,412
Oil and natural gas
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	76,810	55,024
Decrease in operating costs	(23,475)	(19,149)
Oil and natural gas | Intersegment Eliminations
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	(10,772)	(1)
Decrease in operating costs	$ 525	$ 844