Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current Assets:
Cash and Cash Equivalents	$ 273,070	$ 149,913
Restricted Cash - Current	40,366	32,605
Accounts and Notes Receivable
Trade Receivables, net	158,127	104,099
Other Receivables, net	38,517	11,631
Inventories (Note 9)	66,290	62,876
Prepaid Expenses	22,113	25,216
Total Current Assets	598,483	386,340
Property, Plant and Equipment (Note 10):
Total Property, Plant and Equipment	5,408,577	5,250,805
Less—Accumulated Depreciation, Depletion and Amortization	3,448,495	3,272,255
Total Property, Plant and Equipment—Net	1,960,082	1,978,550
Other Assets:
Deferred Income Taxes (Note 6)	0	57,011
Operating Lease ROU Assets	19,799	21,956
Restricted Cash - Non-current	13,516	15,688
Noncurrent assets	38,548	38,947
Other Noncurrent Assets, net	73,949	75,025
Total Other Assets	145,812	208,627
TOTAL ASSETS	2,704,377	2,573,517
Current Liabilities:
Accounts Payable	130,232	76,557
Current Portion of Long-Term Debt (Note 13)	28,846	57,332
Operating Lease Liability, Current Portion (Note 14)	4,922	6,682
Commodity Derivatives (Note 21)	15,142	52,204
Other Accrued Liabilities (Note 12)	269,656	252,457
Total Current Liabilities	448,798	445,232
Long-Term Debt:
Long-Term Debt	342,110	568,052
Finance Lease Obligations (Note 14)	13,225	26,598
Total Long-Term Debt	355,335	594,650
Deferred Credits and Other Liabilities:
Postretirement Benefits Other Than Pensions (Note 15)	232,593	329,659
Pneumoconiosis Benefits (Note 16)	148,390	203,473
Asset Retirement Obligations (Note 8)	221,858	210,718
Workers’ Compensation (Note 16)	40,951	58,148
Salary Retirement (Note 15)	20,585	26,013
Operating Lease Liability (Note 14)	15,073	15,274
Deferred Income Taxes (Note 6)	21,914	0
Other Noncurrent Liabilities	33,054	17,537
Total Deferred Credits and Other Liabilities	734,418	860,822
TOTAL LIABILITIES	1,538,551	1,900,704
Stockholders’ Equity:
Common Stock, $0.01 Par Value; 62,500,000 Shares Authorized, 34,746,904 Shares Issued and Outstanding at December 31, 2022; 34,480,181 Shares Issued and Outstanding at December 31, 2021	347	345
Capital in Excess of Par Value	646,237	646,945
Retained Earnings	668,882	280,960
Accumulated Other Comprehensive Loss	(149,640)	(255,437)
TOTAL EQUITY	1,165,826	672,813
TOTAL LIABILITIES AND EQUITY	$ 2,704,377	$ 2,573,517