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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified | Common Stock [Member] | Accumulated Other Comprehensive Income [Member] | Retained Earnings [Member] | Total
--- | --- | --- | --- | ---
Balance at Dec. 31, 2012 | $ 1,349,777 | $ (294) | $ (459,892) | $ 889,591
Balance (in shares) at Dec. 31, 2012 | 296,025,000 |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |
Stock-based compensation | 686 |  |  | 686
Exercise of stock options | 95 |  |  | 95
Exercise of stock options (in shares) | 48,000 |  |  |
Shares issued for litigation settlement | 3,270 |  |  | 3,270
Shares issued for litigation settlement (in shares) | 1,000,000 |  |  |
Shares issued for Mexico mining concessions | 96 |  |  | 96
Shares issued for Mexico mining concessions (in shares) | 41,000 |  |  |
Net loss |  |  | (139,663) | (139,663)
Balance at Jun. 30, 2013 | 1,353,924 | (294) | (599,555) | 754,075
Balance (in shares) at Jun. 30, 2013 | 297,114,000 |  |  |
Balance at Dec. 31, 2013 | 1,354,696 | (295) | (607,634) | 746,767
Balance (in shares) at Dec. 31, 2013 | 297,159,000 |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |
Stock-based compensation | 609 |  |  | 609
Exercise of stock options | 129 |  |  | 129
Exercise of stock options (in shares) | 60,000 |  |  | 60,300
Unrealized gain on available-for-sale securities, net of taxes |  | 3 |  | 3
Net loss |  |  | (86,135) | (86,135)
Balance at Jun. 30, 2014 | $ 1,355,434 | $ (292) | $ (693,769) | $ 661,373
Balance (in shares) at Jun. 30, 2014 | 297,220,000 |  |  |

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