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Income and Mining Taxes (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Income Tax Contingency [Line Items] |  |  |  |  |
Unrecognized tax benefits that would impact effective income tax rate | $ 23,000 |  | $ 23,000 |  | $ 17,900
Penalties and interest accrued | 14,700 |  | 14,700 |  | $ 9,200
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | 13,729 | $ (16,937) | (4,561) | $ (50,157) |
Income and mining tax benefit (expense) | 768 | 260 | (1,338) | 192 |
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 | 4,453 | (656) | 3,438 | (1,352) |
Current Foreign Tax Expense (Benefit) | (1,793) | (1) | (250) | (2) |
United States - Alternative Minimum tax [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
United States | 119 | (9,764) | (9,242) | (30,471) |
Current Federal Tax Expense (Benefit) | (1,810) | 319 | (2,342) | 2,204 |
Mexico [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Foreign | 3,353 | (5,582) | (4,155) | (15,255) |
Current Foreign Tax Expense (Benefit) | 4,316 | 548 | 4,333 | (716) |
BOLIVIA |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Foreign | 4,016 | (1,219) | 6,062 | (3,598) |
Current Foreign Tax Expense (Benefit) | 848 | 196 | (722) | (1,211) |
Other Countries [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Foreign | 1,788 | 284 | (664) | 519 |
Current Foreign Tax Expense (Benefit) | $ (793) | $ (802) | $ (2,357) | $ (83) |

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- Definition Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6509736 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.7) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Paragraph Question 1-7 + Details
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