Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating Activities:
Net Income (Loss)	$ (78,683)	$ 238,433
Adjustments to Reconcile Net Income to Net Cash Provided By Operating Activities:
Depreciation, Depletion and Amortization	489,774	463,048
Stock-Based Compensation	50,914	38,423
(Gain) Loss on Sale of Assets	(52,794)	(190,257)
Amortization of Mineral Leases	2,014	3,818
Deferred Income Taxes	(31,099)	(5,225)
Equity in Earnings of Affiliates	(20,276)	(22,676)
Changes in Operating Assets:
Accounts and Notes Receivable	11,145	13,359
Inventories	9,418	(8,204)
Prepaid Expenses	(9,259)	(1,362)
Changes in Other Assets	24,318	(8,961)
Changes in Operating Liabilities:
Accounts Payable	(20,553)	5,218
Other Operating Liabilities	174,740	(11,130)
Changes in Other Liabilities	8,148	1,469
Other	31,198	14,210
Net Cash Provided by Operating Activities	589,005	530,163
Investing Activities:
Capital Expenditures	(1,195,909)	(1,152,021)
Increase (Decrease) in Restricted Cash	56,410	0
Proceeds from Sales of Assets	598,174	583,942
Net Investment in Equity Affiliates	(18,112)	(18,701)
Net Cash Used in Investing Activities	(559,437)	(586,780)
Financing Activities:
(Payments on) Proceeds from Short-Term Borrowings	47,000
Payments on Miscellaneous Borrowings	(32,290)	(6,565)
Payments on Securitzation Facility	6,518	0
Tax Benefit from Stock-Based Compensation	2,316	2,578
Dividends Paid	(57,211)	(85,290)
Proceeds from Issuance of Common Stock	2,698	1,234
Issuance of Treasury Stock	609	109
Debt Issuance and Financing Fees	0	(227)
Net Cash (Used in) Provided by Financing Activities	(30,360)	(88,161)
Net Increase in Cash and Cash Equivalents	(792)	(144,778)
Cash and Cash Equivalents at Beginning of Period	21,878	375,736
Cash and Cash Equivalents at End of Period	$ 21,086	$ 230,958