Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss	$ 80,093	$ (52,705)	$ (10,115)	$ (591)	$ 27,388	$ (10,706)
Retained earnings	(74,287)				(74,287)		$ (41,071)
Non-controlling interests in consolidated subsidiaries	0				0		$ (212,271)
Revenues	134,554		134,057		322,919	254,954
General and administrative	7,421		5,751		13,947	12,920
Decrease in operating costs	(53,382)		(74,623)		(165,482)	(145,306)
Intersegment Eliminations
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss	0		0		0	0
Revenues	16		(10,103)		(11,281)	(19,514)
General and administrative	0		880		611	1,760
Decrease in operating costs	(16)		10,983		11,892	21,274
Intersegment Eliminations | Revision of Prior Period, Adjustment | Error Correction Inter Segment Eliminations Between Oil And Natural Gas
Error Corrections and Prior Period Adjustments Restatement [Line Items]
General and administrative			900
Oil and natural gas
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	100,912		41,970		177,722	96,994
Decrease in operating costs	(27,619)		(15,487)		(51,094)	(34,636)
Oil and natural gas | Revision of Prior Period, Adjustment | Error Correction Inter Segment Eliminations Between Oil And Natural Gas
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues			3,900
Decrease in operating costs			(3,400)
Oil and natural gas | Intersegment Eliminations
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	16		(17,806)		(10,756)	(17,807)
Decrease in operating costs	$ (16)		863		$ 509	$ 1,707
Oil and natural gas | Intersegment Eliminations | Revision of Prior Period, Adjustment | Error Correction Inter Segment Eliminations Between Oil And Natural Gas
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues			$ 8,600