Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
CURRENT ASSETS
Cash and cash equivalents	$ 205,708	$ 270,861
Receivables	93,599	116,921
Inventory	98,109	114,931
Ore on leach pads	68,695	48,204
Deferred tax assets	7,197	7,364
Prepaid expenses and other	18,431	15,523
Current assets	491,739	573,804
NON-CURRENT ASSETS
Property, plant and equipment, net	261,043	227,911
Mining properties, net	851,590	501,192
Ore on leach pads, noncurrent	39,685	37,889
Restricted assets	8,003	7,037
Equity securities	3,213	5,982
Receivables	27,507	21,686
Deferred tax assets	64,359	60,151
Other	11,534	9,915
TOTAL ASSETS	1,758,673	1,445,567
CURRENT LIABILITIES
Accounts payable	49,690	49,052
Accrued liabilities and other	38,329	51,513
Debt	11,775	17,498
Royalty obligations	33,440	43,678
Reclamation	3,310	3,871
Deferred tax liabilities	8,078	8,078
Current liabilities	144,622	173,690
NON-CURRENT LIABILITIES
Debt	534,211	451,048
Royalty obligations	6,781	27,651
Reclamation	88,009	66,943
Deferred tax liabilities	222,809	111,006
Other long-term liabilities	47,856	29,911
Non-current liabilities	899,666	686,559
STOCKHOLDERS' EQUITY
Common stock, par value $0.01 per share; authorized 300,000,000 shares, issued and outstanding 136,962,174 at September 30, 2015 and authorized 150,000,000 shares, issued and outstanding 103,384,408 at December 31, 2014	1,370	1,034
Additional paid-in capital	2,983,423	2,789,695
Accumulated other comprehensive income (loss)	(3,620)	(2,808)
Accumulated deficit	(2,266,788)	(2,202,603)
Stockholders' equity	714,385	585,318
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,758,673	$ 1,445,567