Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current Assets:
Cash and Cash Equivalents	$ 161,981	$ 50,850
Restricted Cash - Current	37,557	0
Accounts and Notes Receivable
Trade Receivables, net	88,496	118,289
Other Receivables, net	15,193	42,157
Inventories	56,015	56,200
Prepaid Expenses and Other Assets	24,999	25,445
Total Current Assets	384,241	292,941
Property, Plant and Equipment:
Property, Plant and Equipment	5,219,429	5,143,696
Less - Accumulated Depreciation, Depletion and Amortization	3,220,472	3,094,634
Total Property, Plant and Equipment—Net	1,998,957	2,049,062
Other Assets:
Deferred Income Taxes	111,372	68,821
Right of Use Asset - Operating Leases	32,564	53,436
Restricted Cash - Non-current	12,768	0
Other, net	49,845	59,106
Total Other Assets	206,549	181,363
TOTAL ASSETS	2,589,747	2,523,366
Current Liabilities:
Accounts Payable	78,392	71,229
Current Portion of Long-Term Debt	46,749	53,846
Operating Lease Liability	7,625	20,241
Other Accrued Liabilities	382,910	223,154
Total Current Liabilities	515,676	368,470
Long-Term Debt:
Long-Term Debt	597,697	566,858
Finance Lease Obligations	28,863	36,203
Total Long-Term Debt	626,560	603,061
Deferred Credits and Other Liabilities:
Postretirement Benefits Other Than Pensions	373,603	387,637
Pneumoconiosis Benefits	227,040	229,720
Asset Retirement Obligations	215,151	228,182
Workers’ Compensation	61,518	64,390
Salary Retirement	13,194	35,359
Operating Lease Liability	24,939	35,655
Other	47,486	17,373
Total Deferred Credits and Other Liabilities	962,931	998,316
TOTAL LIABILITIES	2,105,167	1,969,847
Stockholders' Equity:
Common Stock, $0.01 Par Value; 62,500,000 Shares Authorized, 34,480,181 Shares Issued and Outstanding at September 30, 2021; 34,031,374 Shares Issued and Outstanding at December 31, 2020	345	340
Capital in Excess of Par Value	644,920	642,887
Retained Earnings	163,637	246,850
Accumulated Other Comprehensive Loss	(324,322)	(336,558)
TOTAL EQUITY	484,580	553,519
TOTAL LIABILITIES AND EQUITY	$ 2,589,747	$ 2,523,366