Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
CURRENT ASSETS
Cash and cash equivalents	$ 142,915	$ 175,012
Short term investments	657	20,254
Receivables	70,963	83,497
Ore on leach pad	30,394	27,252
Metal and other inventory	156,130	132,781
Deferred tax assets	2,090	1,869
Restricted assets	396	60
Prepaid expenses and other	25,460	24,218
Total Current Assets	429,005	464,943
NON-CURRENT ASSETS
Property, plant and equipment, net	691,219	687,676
Mining properties, net	1,923,251	2,001,027
Ore on leach pad, non-current portion	15,575	6,679
Restricted assets	24,790	28,911
Marketable securities	31,243	19,844
Receivables, non-current portion	48,614	40,314
Debt issuance costs, net	4,056	1,889
Deferred tax assets	68	263
Other	12,619	12,895
TOTAL ASSETS	3,180,440	3,264,441
CURRENT LIABILITIES
Accounts payable	68,709	78,590
Accrued liabilities and other	7,160	13,126
Accrued income taxes	28,659	47,803
Accrued payroll and related benefits	22,892	16,240
Accrued interest payable	125	559
Current portion of debt and capital leases	56,340	32,602
Current portion of royalty obligation	69,959	61,721
Current portion of reclamation and mine closure	3,372	1,387
Deferred tax liabilities	53	53
Total Current Liabilities	257,269	252,081
NON-CURRENT LIABILITIES
Long-term debt and capital leases	5,053	115,861
Non-current portion of royalty obligation	164,272	169,788
Reclamation and mine closure	32,636	32,371
Deferred tax liabilities	540,023	527,573
Other long-term liabilities	37,888	30,046
Total Noncurrent Liabilities	779,872	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	894	897
Additional paid-in capital	2,579,707	2,585,632
Accumulated deficit	(433,706)	(444,833)
Accumulated other comprehensive loss	(3,596)	(4,975)
Total Shareholders' Equity	2,143,299	2,136,721
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 3,180,440	$ 3,264,441