Consolidated Statements of Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement [Abstract]
Revenues	$ 1,002,543	$ 553,432	$ 3,122,310	$ 1,590,841
Costs and Expenses:
Cost of Sales (exclusive of items shown separately below)	827,472	354,418	2,610,342	1,052,495
Depreciation, Depletion and Amortization	151,006	53,329	441,825	165,173
General and Administrative Costs	34,133	36,151	158,285	77,669
Other Operating Expense (Income), net	1,742	(7,685)	(3,169)	(17,608)
Costs and Expenses, Total	1,014,353	436,213	3,207,283	1,277,729
(Loss) Income from Operations	(11,810)	117,219	(84,973)	313,112
Interest Expense	(10,606)	(4,664)	(28,676)	(15,063)
Interest Income	7,578	5,016	20,297	14,145
Loss on Debt Extinguishment	0	0	(11,680)	0
Non-Service Related Pension and Postretirement Benefit Costs	(6,562)	(4,400)	(19,301)	(13,201)
(Loss) Earnings Before Income Tax	(21,400)	113,171	(124,333)	298,993
Income Tax (Benefit) Expense	(52,998)	17,539	(50,098)	43,409
Net Income (Loss)	$ 31,598	$ 95,632	$ (74,235)	$ 255,584
Earnings (Loss) per Share:
Total Basic Earnings (Loss) per Share (in dollars per share)	$ 0.61	$ 3.23	$ (1.44)	$ 8.60
Total Diluted Earnings (Loss) per Share (in dollars per share)	0.61	3.22	(1.44)	8.57
Dividends Declared per Common Share (in dollars per share)	$ 0.10	$ 0.25	$ 0.30	$ 0.25