Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
CURRENT ASSETS
Cash and cash equivalents	$ 269,133	$ 206,690
Investments	47,642	0
Receivables	68,693	81,074
Ore on leach pads	44,964	50,495
Inventory	137,644	132,023
Deferred tax assets	35,079	35,008
Prepaid expenses and other	23,593	25,940
Assets, Current	626,748	531,230
NON-CURRENT ASSETS
Property, plant and equipment, net	482,787	486,273
Mining properties, net	1,728,667	1,751,501
Ore on Leach Pad Non Current	46,956	31,528
Restricted assets	7,510	7,014
Marketable securities	13,761	14,521
Receivables	38,424	36,574
Debt issuance costs, net	11,031	10,812
Deferred tax assets	808	1,189
Other	10,830	15,336
TOTAL ASSETS	2,967,522	2,885,978
CURRENT LIABILITIES
Accounts payable	49,651	53,847
Accrued liabilities and other	40,632	38,266
Debt	11,565	2,505
Royalty obligations	51,087	48,019
Reclamation	752	913
Deferred tax liabilities	1,858	1,011
Current liabilities	155,545	144,561
NON-CURRENT LIABILITIES
Debt	468,570	306,130
Royalty obligations	58,505	65,142
Reclamation	59,757	57,515
Deferred tax liabilities	540,232	556,246
Other long-term liabilities	28,280	25,817
Non-current liabilities	1,155,344	1,010,850
SHAREHOLDERS' EQUITY
Common stock, par value $0.01 per share; authorized 150,000,000 shares, issued and outstanding 103,485,960 at June 30, 2014 and 102,843,003 at December 31, 2013	1,034	1,028
Additional paid-in capital	2,785,761	2,781,164
Accumulated other comprehensive loss	(3,131)	(4,906)
Accumulated deficit	(1,127,031)	(1,046,719)
Shareholders' Equity	1,656,633	1,730,567
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 2,967,522	$ 2,885,978