CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
OPERATING ACTIVITIES
Net loss	$ (184,660)	$ (989,404)
Less income from discontinued operations		(5,180)
Loss from continuing operations	(184,660)	(994,584)
Adjustments to reconcile loss from continuing operations to net cash flows provided by (used in) operating activities:
Depreciation and depletion	232,496	223,512
Deferred income tax benefit	(68,426)	(100,419)
Impairment charges		1,106,715
Amortization of debt issuance costs	25,392	12,763
Other	(4,422)	28,259
Decrease (increase) in current assets:
Receivables	(48,631)	79,310
Inventories	(7,274)	(113,601)
Prepaid expenses and other current assets	4,801	(8,412)
Increase (decrease) in current liabilities:
Accounts payable	(1,397)	91,349
Accrued interest	30,676	(1,300)
Accrued expenses and other current liabilities	(22,581)	9,414
Cash flows provided by (used in) operating activities	(44,026)	333,006
INVESTING ACTIVITIES
Additions to property, plant and equipment	(108,735)	(331,340)
Proceeds from sales of investments	1,559	12,382
Other	663	1,076
Cash flows used in investing activities	(106,513)	(317,882)
FINANCING ACTIVITIES
Proceeds from issuance of debt	897,412
Borrowings under revolving credit agreement	646,320	272,926
Repayments on revolving credit agreement	(646,320)	(125,396)
Retirements of debt	(510,255)	(128,450)
Dividends paid	(16,264)	(23,432)
Net consideration paid upon exercise of warrants		(11,535)
Debt issuance costs	(42,128)	(6,376)
Other	(732)	178
Cash flows provided by (used in) financing activities	328,033	(22,085)
Cash flows provided by (used in) continuing operations	177,494	(6,961)
CASH FLOWS FROM DISCONTINUED OPERATIONS
Cash flows provided by investing activities		9,500
Effect of foreign exchange rates on cash	(961)	(1,047)
Net increase in cash and cash equivalents	176,533	1,492
Cash and cash equivalents at beginning of period	116,601	128,430
Cash and cash equivalents at end of period	$ 293,134	$ 129,922