Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
CURRENT ASSETS
Cash and cash equivalents	$ 331,311	$ 125,440
Short term investments	1,498	999
Receivables	68,182	62,438
Ore on leach pad	26,748	22,991
Metal and other inventory	184,690	170,670
Deferred tax assets	2,627	2,458
Restricted assets	0	396
Prepaid expenses and other	22,324	20,790
Total Current Assets	637,380	406,182
NON-CURRENT ASSETS
Property, plant and equipment, net	667,696	683,860
Mining properties, net	1,969,952	1,991,951
Ore on leach pad, non-current portion	24,073	21,356
Restricted assets	24,882	24,970
Marketable securities	23,498	27,065
Receivables, non-current portion	39,061	48,767
Debt issuance costs, net	12,429	3,713
Deferred tax assets	946	955
Other	23,765	12,582
TOTAL ASSETS	3,423,682	3,221,401
CURRENT LIABILITIES
Accounts payable	52,636	57,482
Accrued liabilities and other	9,964	10,002
Accrued income taxes	6,186	27,108
Accrued payroll and related benefits	13,816	21,306
Accrued interest payable	4,283	478
Current portion of debt and capital leases	6,130	55,983
Current portion of royalty obligation	61,541	65,104
Current portion of reclamation and mine closure	758	668
Deferred tax liabilities	53	121
Total Current Liabilities	155,367	238,252
NON-CURRENT LIABILITIES
Long-term debt and capital leases	307,791	3,460
Non-current portion of royalty obligation	119,681	141,879
Reclamation and mine closure	35,252	34,670
Deferred tax liabilities	585,073	577,488
Other long-term liabilities	24,684	27,372
Total Noncurrent Liabilities	1,072,481	784,869
COMMITMENTS AND CONTINGENCIES (Notes 10, 11, 12, 15, 16 and 19)
SHAREHOLDERS' EQUITY
Common stock, par value $0.01 per share; authorized 150,000,000 shares, issued and outstanding 89,743,142 at March 31, 2013 and 90,342,338 at December 31, 2012	897	903
Additional paid-in capital	2,590,075	2,601,254
Accumulated deficit	(383,886)	(396,156)
Accumulated other comprehensive loss	(11,252)	(7,721)
Total Shareholders' Equity	2,195,834	2,198,280
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 3,423,682	$ 3,221,401