Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
CURRENT ASSETS
Cash and cash equivalents	$ 199,397	$ 175,012
Short term investments	907	20,254
Receivables	70,443	83,497
Ore on leach pad	30,562	27,252
Metal and other inventory	145,144	132,781
Deferred tax assets	2,090	1,869
Restricted assets	456	60
Prepaid expenses and other	22,184	24,218
Total Current Assets	471,183	464,943
NON-CURRENT ASSETS
Property, plant and equipment, net	693,026	687,676
Mining properties, net	1,945,763	2,001,027
Ore on leach pad, non-current portion	12,631	6,679
Restricted assets	29,134	28,911
Marketable securities	21,150	19,844
Receivables, non-current portion	45,352	40,314
Debt issuance costs, net	2,738	1,889
Deferred tax assets	132	263
Other	12,401	12,895
TOTAL ASSETS	3,233,510	3,264,441
CURRENT LIABILITIES
Accounts payable	66,991	78,590
Accrued liabilities and other	8,321	13,126
Accrued income taxes	23,929	47,803
Accrued payroll and related benefits	18,119	16,240
Accrued interest payable	1,437	559
Current portion of debt and capital leases	82,708	32,602
Current portion of royalty obligation	63,269	61,721
Current portion of reclamation and mine closure	4,812	1,387
Deferred tax liabilities	53	53
Total Current Liabilities	269,639	252,081
NON-CURRENT LIABILITIES
Long-term debt and capital leases	53,974	115,861
Non-current portion of royalty obligation	150,534	169,788
Reclamation and mine closure	30,531	32,371
Deferred tax liabilities	545,031	527,573
Other long-term liabilities	23,091	30,046
Total Noncurrent Liabilities	803,161	875,639
COMMITMENTS AND CONTINGENCIES (Notes 10, 11, 12,13, 14, 15, 16 and 19)
SHAREHOLDERS' EQUITY
Common stock, par value $0.01 per share; authorized 150,000,000 shares, 89,901,675 issued at June 30, 2012 and 89,655,124 issued December 31, 2011	899	897
Additional paid-in capital	2,587,923	2,585,632
Accumulated deficit	(417,885)	(444,833)
Accumulated other comprehensive loss	(10,227)	(4,975)
Total Shareholders' Equity	2,160,710	2,136,721
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 3,233,510	$ 3,264,441