Discontinued Operation (Cash Flow Of Discontinued Operations) (Details) - USD ($) $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
	Feb. 02, 2021	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other expenses	$ 0	$ 16,726	$ 16,700	$ 0	$ 0
Pumpco Member
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reduction in value of assets	0	0		117,335	84,470
(Gain)/loss on sale of assets	(43)	(0)		286	12,727
Other expenses	0	15,807		0	0
Depreciation, depletion, amortization and accretion	2,141	31,502		31,022	124,746
Proceeds from sales of assets	$ 486	$ 88,332		$ 22,224	$ 23,140