Consolidated Statements of (Loss) Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Statement [Abstract]
Revenues	$ 4,164,775	$ 2,164,406	$ 2,506,635
Costs and Expenses:
Cost of Sales (exclusive of items shown separately below)	3,544,817	1,431,432	1,377,623
Depreciation, Depletion and Amortization	621,067	223,526	241,317
General and Administrative Costs	214,856	115,224	103,470
Other Operating Income and Expense, net	(33,904)	43,224	(19,111)
Costs and Expenses	4,346,836	1,813,406	1,703,299
(Loss) Income from Operations	(182,061)	351,000	803,336
Interest Expense	(40,124)	(22,192)	(29,325)
Interest Income	25,890	19,223	13,597
Loss on Debt Extinguishment	(11,680)	0	(2,725)
Non-Service Related Pension and Postretirement Benefit Costs	(25,728)	(17,384)	(7,011)
(Loss) Earnings Before Income Tax	(233,703)	330,647	777,872
Income Tax (Benefit) Expense (Note 5)	(80,487)	44,242	121,980
Net (Loss) Income	$ (153,216)	$ 286,405	$ 655,892
(Loss) Earnings per Share:
Total Basic (Loss) Earnings per Share (in dollars per share)	$ (2.98)	$ 9.65	$ 19.91
Total Diluted (Loss) Earnings per Share (in dollars per share)	(2.98)	9.61	19.79
Dividends Declared per Common Share (in dollars per share)	$ 0.40	$ 0.50	$ 2.20