Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
CURRENT ASSETS
Cash and cash equivalents	$ 272,932	$ 206,690
Investments	45,628	0
Receivables	75,806	81,074
Ore on leach pads	59,895	50,495
Inventory	133,578	132,023
Deferred tax assets	34,998	35,008
Prepaid expenses and other	30,835	25,940
Current assets	653,672	531,230
NON-CURRENT ASSETS
Property, plant and equipment, net	476,837	486,273
Mining properties, net	1,740,474	1,751,501
Ore on Leach Pad Non Current	34,485	31,528
Restricted assets	7,426	7,014
Marketable securities	15,646	14,521
Receivables	36,271	36,574
Debt issuance costs, net	11,356	10,812
Deferred tax assets	829	1,189
Other	9,989	15,336
TOTAL ASSETS	2,986,985	2,885,978
CURRENT LIABILITIES
Accounts payable	49,958	53,847
Accrued liabilities and other	29,861	38,266
Debt	8,095	2,505
Royalty obligations	50,250	48,019
Reclamation	762	913
Deferred tax liabilities	1,858	1,011
Current liabilities	140,784	144,561
NON-CURRENT LIABILITIES
Debt	456,152	306,130
Royalty obligations	62,390	65,142
Reclamation	58,630	57,515
Deferred tax liabilities	544,096	556,246
Other long-term liabilities	27,236	25,817
Non-current liabilities	1,148,504	1,010,850
SHAREHOLDERS' EQUITY
Common stock, par value $0.01 per share; authorized 150,000,000 shares, issued and outstanding 103,584,671 at March 31, 2014 and 102,843,003 at December 31, 2013	1,035	1,028
Additional paid-in capital	2,783,520	2,781,164
Accumulated other comprehensive loss	(2,948)	(4,906)
Accumulated deficit	(1,083,910)	(1,046,719)
Shareholders' Equity	1,697,697	1,730,567
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 2,986,985	$ 2,885,978