Discontinued Operations (Components Of Income (Loss) From Discontinued Operations) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		5 Months Ended	6 Months Ended
	Feb. 02, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation, depletion, amortization and accretion	$ 8,358	$ 23,346	$ 59,018	$ 99,048	$ 57,431
General and administrative expenses	11,052	30,231	32,308	50,746	62,249
Other (gains) and losses, net		(18,013)	534	365	(16,866)
Income (loss) from operations	(4,525)	66,445	(36,451)	(65,327)	83,190
Other income (expense)	(2,105)	(13,471)	2,570	(275)	476
Income (loss) from discontinued operations, net of income tax	(352)	(1,944)	(19,400)	(28,806)	(205)
Pumpco [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	10,719	0	45,114	68,366	0
Cost of services	10,398	0	37,871	60,393	0
Depreciation, depletion, amortization and accretion	2,141	0	18,581	31,356	0
General and administrative expenses	1,119	1,711	3,623	6,218	5,453
Other (gains) and losses, net	0	750	10,018	7,518	(5,193)
Income (loss) from operations	(2,939)	(2,461)	(24,979)	(37,119)	(260)
Other income (expense)	2,485	0	(53)	(50)	0
Loss from discontinued operations before tax	(454)	(2,461)	(25,032)	(37,169)	(260)
Income tax benefit (expense)	102	517	5,632	8,363	(55)
Income (loss) from discontinued operations, net of income tax	$ (352)	$ (1,944)	$ (19,400)	$ (28,806)	$ (205)