Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
CURRENT ASSETS
Cash and cash equivalents	$ 205,868	$ 270,861
Receivables	112,159	116,921
Inventory	109,207	114,931
Ore on leach pads	67,458	48,204
Deferred tax assets	7,262	7,364
Prepaid expenses and other	17,442	15,523
Current assets	519,396	573,804
NON-CURRENT ASSETS
Property, plant and equipment, net	254,574	227,911
Mining properties, net	864,884	501,192
Ore on leach pads	32,663	37,889
Restricted assets	8,377	7,037
Equity securities	4,216	5,982
Receivables	26,738	21,686
Deferred tax assets	64,120	60,151
Other	11,681	9,915
TOTAL ASSETS	1,786,649	1,445,567
CURRENT LIABILITIES
Accounts payable	42,522	49,052
Accrued liabilities and other	47,590	51,513
Debt	9,121	17,498
Royalty obligations	41,999	43,678
Reclamation	3,786	3,871
Deferred tax liabilities	8,078	8,078
Current liabilities	153,096	173,690
NON-CURRENT LIABILITIES
Debt	538,589	451,048
Royalty obligations	12,675	27,651
Reclamation	87,538	66,943
Deferred tax liabilities	223,868	111,006
Other long-term liabilities	43,233	29,911
Non-current liabilities	905,903	686,559
STOCKHOLDERS' EQUITY
Common stock, par value $0.01 per share; authorized 300,000,000 shares, issued and outstanding 137,122,762 at June 30, 2015 and authorized 150,000,000 shares, issued and outstanding 103,384,408 at December 31, 2014	1,371	1,034
Additional paid-in capital	2,982,019	2,789,695
Accumulated other comprehensive income (loss)	(3,172)	(2,808)
Accumulated deficit	(2,252,568)	(2,202,603)
Stockholders' equity	727,650	585,318
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,786,649	$ 1,445,567