Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current Assets:
Cash and Cash Equivalents	$ 413,175	$ 408,240
Short-Term Investments	0	51,993
Accounts and Notes Receivable
Trade Receivables, net	311,313	136,750
Other Receivables, net	26,481	25,900
Inventories	377,075	96,201
Other Current Assets	144,027	66,874
Total Current Assets	1,272,071	785,958
Total Property, Plant and Equipment—Net	4,474,954	1,921,699
Other Assets:
Funds for Asset Retirement Obligations	165,493	12,054
Salary Retirement	44,415	41,938
Other Noncurrent Assets, net	251,805	117,894
Total Other Assets	461,713	171,886
TOTAL ASSETS	6,208,738	2,879,543
Current Liabilities:
Accounts Payable	270,823	143,635
Current Portion of Long-Term Debt	57,338	112,865
Other Accrued Liabilities	385,621	262,184
Total Current Liabilities	713,782	518,684
Long-Term Debt:
Long-Term Debt	313,229	79,524
Finance Lease Obligations	20,751	15,270
Total Long-Term Debt	333,980	94,794
Deferred Credits and Other Liabilities:
Postretirement Benefits Other Than Pensions	212,137	176,251
Pneumoconiosis Benefits	251,659	145,489
Asset Retirement Obligations	492,363	212,178
Workers’ Compensation	73,831	36,051
Salary Retirement	20,694	20,073
Deferred Income Taxes	218,524	49,214
Other Noncurrent Liabilities	124,182	58,562
Total Deferred Credits and Other Liabilities	1,393,390	697,818
TOTAL LIABILITIES	2,441,152	1,311,296
Stockholders' Equity:
Common Stock, $0.01 Par Value; 125,000,000 Shares Authorized, 51,484,171 Shares Issued and Outstanding at June 30, 2025; 62,500,000 Shares Authorized, 29,407,830 Shares Issued and Outstanding at December 31, 2024	515	294
Capital in Excess of Par Value	2,992,600	540,412
Retained Earnings	908,125	1,162,114
Accumulated Other Comprehensive Loss	(133,654)	(134,573)
TOTAL EQUITY	3,767,586	1,568,247
TOTAL LIABILITIES AND EQUITY	$ 6,208,738	$ 2,879,543