Discontinued Operation (Cash Flow Of Discontinued Operations) (Details) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended
	Feb. 02, 2021	Mar. 31, 2021	Mar. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other (gains) and losses, net		$ (169)	$ 1,147
Other gains and losses, net		169	1,147
Pumpco Member
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Gain)/loss on sale of assets	(43)	0	0
Other (gains) and losses, net	0	(2,500)	(5,943)
Depreciation, depletion, amortization and accretion	2,141	12,775	0
Proceeds from sales of assets	$ 486	$ 5,024	$ 13,194