Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Taxes
Income tax provision (benefit) at statutory rate	$ 226,587	$ 71,284	$ (72,371)
Percentage depletion and other perm items	(52,647)	(29,392)	(7,763)
State taxes, net of effect of federal taxes	2,988	16,490	(3,298)
Change in valuation allowance	(420,688)	(69,603)	76,524
Other, net	(8,166)	13,095	6,901
Provision for income taxes	$ (251,926)	$ 1,874	$ (7)

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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