Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current Assets:
Cash and Cash Equivalents	$ 222,901	$ 149,913
Restricted Cash - Current	33,854	32,605
Accounts and Notes Receivable
Trade Receivables, net	178,446	104,099
Other Receivables, net	11,342	11,631
Inventories	58,798	62,876
Prepaid Expenses and Other Current Assets	23,051	25,216
Total Current Assets	528,392	386,340
Property, Plant and Equipment:
Property, Plant and Equipment	5,293,905	5,250,805
Less - Accumulated Depreciation, Depletion and Amortization	3,323,580	3,272,255
Total Property, Plant and Equipment, Net	1,970,325	1,978,550
Other Assets:
Deferred Income Taxes	61,452	57,011
Right of Use Asset - Operating Leases	22,333	21,956
Restricted Cash - Non-current	12,253	15,688
Salary Retirement	44,011	38,947
Other Noncurrent Assets, net	76,194	75,025
Total Other Assets	216,243	208,627
TOTAL ASSETS	2,714,960	2,573,517
Current Liabilities:
Accounts Payable	109,454	80,343
Current Portion of Long-Term Debt	62,321	57,332
Operating Lease Liability, Current Portion	8,271	6,682
Commodity Derivatives	200,185	52,204
Other Accrued Liabilities	247,188	248,671
Total Current Liabilities	627,419	445,232
Long-Term Debt:
Long-Term Debt	534,902	568,052
Finance Lease Obligations	21,990	26,598
Total Long-Term Debt	556,892	594,650
Deferred Credits and Other Liabilities:
Postretirement Benefits Other Than Pensions	327,352	329,659
Pneumoconiosis Benefits	201,800	203,473
Asset Retirement Obligations	211,427	210,718
Workers’ Compensation	57,621	58,148
Salary Retirement Liability (Note 15)	25,876	26,013
Operating Lease Liability	14,062	15,274
Other Noncurrent Liabilities	24,103	17,537
Total Deferred Credits and Other Liabilities	862,241	860,822
TOTAL LIABILITIES	2,046,552	1,900,704
Stockholders' Equity:
Common Stock, $0.01 Par Value; 62,500,000 Shares Authorized, 34,814,486 Shares Issued and Outstanding at March 31, 2022; 34,480,181 Shares Issued and Outstanding at December 31, 2021	348	345
Capital in Excess of Par Value	645,071	646,945
Retained Earnings	276,510	280,960
Accumulated Other Comprehensive Loss	(253,521)	(255,437)
TOTAL EQUITY	668,408	672,813
TOTAL LIABILITIES AND EQUITY	$ 2,714,960	$ 2,573,517