Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 413,743	$ 283,606
Investments		1,474
Accounts receivable	29,095	36,840
Inventories:
Concentrates, doré, and stockpiled ore	14,527	8,886
Materials and supplies	11,212	10,245
Current deferred income taxes	54,774	87,287
Other current assets	19,461	3,683
Total current assets	542,812	432,021
Non-current investments	3,305	1,194
Non-current restricted cash and investments	926	10,314
Properties, plants, equipment and mineral interests, net	872,860	833,288
Non-current deferred income taxes	71,795	100,072
Other non-current assets and deferred charges	24,022	5,604
Total assets	1,515,720	1,382,493
Current liabilities:
Accounts payable and accrued liabilities	51,630	31,725
Accrued payroll and related benefits	11,369	10,789
Accrued taxes	9,766	16,042
Current portion of capital leases	3,514	2,481
Current portion of accrued reclamation and closure costs	178,415	175,484
Current derivative contract liabilities		20,016
Total current liabilities	254,694	256,537
Capital leases	4,070	3,792
Accrued reclamation and closure costs	141,923	143,313
Other noncurrent liabilities	15,990	16,598
Total liabilities	416,677	420,240
Preferred stock, 5,000,000 shares authorized:
Common stock, $0.25 par value, authorized 500,000,000 shares; issued and outstanding 2011 — 279,620,991 shares and 2010 — 258,485,666 shares	70,003	64,704
Capital surplus	1,181,559	1,179,751
Accumulated deficit	(133,398)	(265,577)
Accumulated other comprehensive loss	(16,640)	(15,117)
Less treasury stock, at cost; 2011 – 392,645 and 2010 – 335,957 shares	(2,520)	(2,051)
Total shareholders’ equity	1,099,043	962,253
Total liabilities and shareholders’ equity	1,515,720	1,382,493
Series B Preferred Stock [Member]
Preferred stock, 5,000,000 shares authorized:
Preferred Stock Value	39	39
Mandatory Convertible Preferred Stock [Member]
Preferred stock, 5,000,000 shares authorized:
Preferred Stock Value		$ 504