Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
CURRENT ASSETS
Cash and cash equivalents	$ 173,389	$ 200,714
Receivables	82,929	85,992
Inventory	78,597	81,711
Ore on leach pads	72,703	67,329
Prepaid expenses and other	13,130	10,942
Current assets	420,748	446,688
NON-CURRENT ASSETS
Property, plant and equipment, net	220,948	195,999
Mining properties, net	574,104	589,219
Ore on leach pads, noncurrent	49,294	44,582
Restricted assets	13,221	11,633
Equity securities	5,530	2,766
Receivables	24,114	24,768
Deferred tax assets	2,750	1,942
Other	14,389	14,892
TOTAL ASSETS	1,325,098	1,332,489
CURRENT LIABILITIES
Accounts payable	46,955	48,732
Accrued liabilities and other	42,037	53,953
Debt	16,801	10,431
Royalty obligations	21,183	24,893
Reclamation	3,463	2,071
Current liabilities	130,439	140,080
NON-CURRENT LIABILITIES
Debt	494,300	479,979
Royalty obligations	6,354	4,864
Reclamation	83,902	83,197
Deferred tax liabilities	146,845	147,132
Other long-term liabilities	58,118	55,761
Non-current liabilities	789,519	770,933
STOCKHOLDERS' EQUITY
Common stock, par value $0.01 per share; authorized 300,000,000 shares, issued and outstanding 153,240,428 at March 31, 2016 and 151,339,136 at December 31, 2015	1,532	1,513
Additional paid-in capital	3,026,871	3,024,461
Accumulated other comprehensive income (loss)	(2,091)	(3,722)
Accumulated deficit	(2,621,172)	(2,600,776)
Stockholders' equity	405,140	421,476
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,325,098	$ 1,332,489