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Income and Mining Taxes Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Income Tax Disclosure [Abstract] |  |
Deferred Tax Liabilities, Foreign Royalty Tax | $ 0 | $ 15,451
Deferred Tax Liabilities Mineral Properties | 69,799 | 0
Deferred Tax Liabilities, Undistributed Foreign Earnings | 1,302 | 12,999
Deferred Tax Liabilities, Inventory | 4,426 | 2,353
Deferred Tax Liabilities, Royalties and Long-Term Debt | 8,685 | 1,648
Deferred Tax Liabilities, Gross | 84,212 | 32,451
Deferred Tax Assets, Operating Loss Carryforwards | 202,756 | 203,958
Deferred Tax Assets Mineral Properties | 0 | 34,966
Deferred Tax Assets, Property, Plant and Equipment | 87,978 | 6,980
Deferred Tax Assets - Mexican Mining Royalty | 6,359 | 0
Deferred Tax Assets, Capital Loss Carryforwards | 6,770 | 3,938
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Asset Retirement Obligations | 25,255 | 21,480
Deferred Tax Assets Unrealized Foreign Currency Loss and Other | 7,413 | 8,424
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities | 17,713 | 17,905
Tax Credit Carryforwards | 31,272 | 26,439
Deferred Tax Assets, Gross | 385,516 | 324,090
Deferred Tax Assets, Valuation Allowance | (375,911) | (436,829)
Deferred Tax Assets, Net of Valuation Allowance | 9,605 | (112,739)
Deferred Tax Liabilities, Net | $ 74,607 | $ 145,190

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- Definition Amount of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Deferred Tax Liability -URI http://asc.fasb.org/extlink&oid=6510232 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph b(2) -Article 7 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51675352&loc=d3e28680-109314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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