CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 185,146	$ 293,410
Receivables, net	252,482	143,238
Inventories	226,566	97,631
Deferred income taxes	42,287	62,371
Prepaid expenses	63,887	28,179
Other current assets	49,238	10,710
Total current assets	819,606	635,539
Mineral interests, net of accumulated depletion of $91.0 million and $17.6 million, respectively	4,370,073	17,305
Property, plant and equipment, net of accumulated depreciation of $572.3 million and $433.1 million, respectively	1,550,004	772,696
Deferred income taxes		149,520
Goodwill	278,425
Other long-term assets	153,839	82,705
Total assets	7,171,947	1,657,765
LIABILITIES AND STOCKHOLDERS' EQUITY
Current debt	97,426	13,903
Accounts payable	137,690	70,692
Accrued expenses	238,001	52,399
Accumulated postretirement benefits obligation	25,692	24,753
Other current liabilities	30,358	32,100
Total current liabilities	529,167	193,847
Long-term debt	2,327,313	154,570
Deferred income taxes	1,395,199
Accumulated postretirement benefits obligation	464,710	451,348
Other long-term liabilities	348,236	262,934
Total liabilities	5,064,625	1,062,699
Commitments and contingencies (Note 8)
Stockholders' equity:
Common stock, $0.01 par value per share: Authorized-200,000,000 shares,Issued-62,437,811 and 53,136,977 shares, respectively	624	531
Preferred stock, $0.01 par value per share: Authorized-20,000,000 shares, issued-0 shares
Capital in excess of par value	1,618,832	355,540
Retained earnings	654,539	411,383
Accumulated other comprehensive income (loss):
Pension and other postretirement benefit plans, net of tax	(162,997)	(172,317)
Unrealized investment loss, net of tax	(1,192)
Foreign currency translation adjustment	(266)
Unrealized loss on hedges, net of tax	(2,218)	(71)
Total stockholders' equity	2,107,322	595,066
Total liabilities and stockholders' equity	$ 7,171,947	$ 1,657,765