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Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-In Capital | Accumulated Deficit | Accumulated Other Comprehensive Income (Loss) | La Preciosa [Member] | La Preciosa [Member] Common Stock | La Preciosa [Member] Additional Paid-In Capital | La Preciosa [Member] Accumulated Deficit | La Preciosa [Member] Accumulated Other Comprehensive Income (Loss) | GRC [Member] | GRC [Member] Common Stock | GRC [Member] Additional Paid-In Capital | GRC [Member] Accumulated Deficit | GRC [Member] Accumulated Other Comprehensive Income (Loss) | Paramount Gold and Silver Corp. [Member] | Paramount Gold and Silver Corp. [Member] Common Stock | Paramount Gold and Silver Corp. [Member] Additional Paid-In Capital | Paramount Gold and Silver Corp. [Member] Accumulated Deficit | Paramount Gold and Silver Corp. [Member] Accumulated Other Comprehensive Income (Loss)
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balances at Dec. 31, 2012 | $ 2,198,280 | $ 903 | $ 2,601,254 | $ (396,156) | $ (7,721) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balances, in shares at Dec. 31, 2012 |  | 90,342,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | (650,563) | $ 0 | 0 | (650,563) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) | 2,815 | $ 0 | 0 | 0 | 2,815 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchased During Period, Shares |  |  |  |  |  |  | (1,691,000) |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchased During Period, Value |  |  |  |  |  | $ (27,552) | $ (17) | $ (27,535) | $ 0 | $ 0 |  |  |  |  |  |  |  |  |  |
Common stock issued for the acquisition of Paramount Gold and Silver Corp. (in shares) |  |  |  |  |  |  | 11,573,000 |  |  |  |  | 2,130,000 |  |  |  |  |  |  |  |
Common stock issued for the acquisition of Paramount Gold and Silver Corp. |  |  |  |  |  | $ 179,140 | $ 116 | $ 179,024 | $ 0 | $ 0 | $ 22,198 | $ 21 | $ 22,177 | $ 0 | $ 0 |  |  |  |  |
Common stock issued under stock-based compensation plans, net (in shares) |  | 489,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock issued under stock-based compensation plans, net | 6,249 | $ 5 | 6,244 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balances at Dec. 31, 2013 | 1,730,567 | $ 1,028 | 2,781,164 | (1,046,719) | (4,906) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balances, in shares at Dec. 31, 2013 |  | 102,843,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | (1,186,874) | $ 0 | 0 | (1,186,874) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) | 2,098 | $ 0 | 0 | 0 | 2,098 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock issued under stock-based compensation plans, net (in shares) |  | 541,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock issued under stock-based compensation plans, net | 8,537 | $ 6 | 8,531 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balances at Dec. 31, 2014 | 554,328 | $ 1,034 | 2,789,695 | (2,233,593) | (2,808) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balances, in shares at Dec. 31, 2014 |  | 103,384,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | (367,183) | $ 0 | 0 | (367,183) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) | $ (914) | $ 0 | 0 | 0 | (914) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock issued for the acquisition of Paramount Gold and Silver Corp. (in shares) | 32,667,327 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 32,667,000 |  |  |
Common stock issued for the acquisition of Paramount Gold and Silver Corp. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 188,817 | $ 327 | $ 188,490 | $ 0 | $ 0
Common stock issued for the extinguishment of Senior Notes (in shares) |  | 14,365,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock issued for the extinguishment of Senior Notes | $ 38,523 | $ 144 | 38,379 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock issued under stock-based compensation plans, net (in shares) |  | 923,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock issued under stock-based compensation plans, net | 7,905 | $ 8 | 7,897 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balances at Dec. 31, 2015 | $ 421,476 | $ 1,513 | $ 3,024,461 | $ (2,600,776) | $ (3,722) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balances, in shares at Dec. 31, 2015 |  | 151,339,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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