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Income and Mining Taxes (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Income Tax Contingency [Line Items] |  |  |  |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | $ 40,800 |  |  |  |
Deferred Income Tax Expense (Benefit) | 15,000 |  |  |  |
Unrecognized tax benefits that would impact effective income tax rate | 22,600 |  | $ 22,600 |  | $ 17,900
Penalties and interest accrued | 9,000 |  | 9,000 |  | $ 9,200
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | 15,102 | $ (22,479) | 10,542 | $ (72,636) |
Income and mining tax benefit (expense) | 54,455 | 8,260 | 53,118 | 8,451 |
Minimum [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Decrease in unrecognized tax benefits is reasonably possible | 3,500 |  | 3,500 |  |
Maximum [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Decrease in unrecognized tax benefits is reasonably possible | 4,500 |  | 4,500 |  |
ARGENTINA |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Foreign | (301) | (731) | 3,137 | (2,083) |
Current Foreign Tax Expense (Benefit) | 67 | (2) | (183) | (3) |
United States - Alternative Minimum tax [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
United States | 3,286 | (16,168) | (5,956) | (46,640) |
Current Federal Tax Expense (Benefit) | 10,712 | (1,080) | 8,370 | 1,123 |
Mexico [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Foreign | 3,020 | (1,412) | (1,136) | (16,666) |
Current Foreign Tax Expense (Benefit) | 37,821 | 11,951 | 42,155 | 11,234 |
BOLIVIA |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Foreign | 4,325 | (4,483) | 10,388 | (8,081) |
Current Foreign Tax Expense (Benefit) | 5,904 | (1,029) | 5,182 | (2,240) |
Other Countries [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Foreign | 4,772 | 315 | 4,109 | 834 |
Current Foreign Tax Expense (Benefit) | $ (49) | $ (1,580) | $ (2,406) | $ (1,663) |

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