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Derivative Financial Instruments (Details 1) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Fair value of the derivative instruments |  |
Derivative Asset, Fair Value | $ 135 |
Prepaid expenses and other [Member] |  |
Fair value of the derivative instruments |  |
Derivative Asset, Fair Value | 184 | 1,406
Accrued liabilities and other [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value | 1,640 | 2,488
Other long-term liabilities [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value |  | 7,274
Current portion of royalty obligation [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value | 17,650 | 41,146
Non-current portion of royalty obligation [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value | 22,688 | 103,952
Forward foreign exchange contracts [Member] | Prepaid expenses and other [Member] |  |
Fair value of the derivative instruments |  |
Derivative Asset, Fair Value | 38 | 376
Forward foreign exchange contracts [Member] | Accrued liabilities and other [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value | 947 | 300
Forward foreign exchange contracts [Member] | Other long-term liabilities [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value |  |
Forward foreign exchange contracts [Member] | Current portion of royalty obligation [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value |  |
Forward foreign exchange contracts [Member] | Non-current portion of royalty obligation [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value |  |
Palmarejo gold production royalty [Member] | Prepaid expenses and other [Member] |  |
Fair value of the derivative instruments |  |
Derivative Asset, Fair Value |  |
Palmarejo gold production royalty [Member] | Accrued liabilities and other [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value |  |
Palmarejo gold production royalty [Member] | Other long-term liabilities [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value |  |
Palmarejo gold production royalty [Member] | Current portion of royalty obligation [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value | 17,650 | 41,146
Palmarejo gold production royalty [Member] | Non-current portion of royalty obligation [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value | 22,688 | 103,952
Put and call options, net [Member] | Prepaid expenses and other [Member] |  |
Fair value of the derivative instruments |  |
Derivative Asset, Fair Value | 135 |
Put and call options, net [Member] | Accrued liabilities and other [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value |  | 2,025
Put and call options, net [Member] | Other long-term liabilities [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value |  | 7,274
Put and call options, net [Member] | Current portion of royalty obligation [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value |  |
Put and call options, net [Member] | Non-current portion of royalty obligation [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value |  |
Concentrate sales contracts [Member] | Prepaid expenses and other [Member] |  |
Fair value of the derivative instruments |  |
Derivative Asset, Fair Value | 11 | 1,030
Concentrate sales contracts [Member] | Accrued liabilities and other [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value | 693 | 163
Concentrate sales contracts [Member] | Other long-term liabilities [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value |  |
Concentrate sales contracts [Member] | Current portion of royalty obligation [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value |  |
Concentrate sales contracts [Member] | Non-current portion of royalty obligation [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value |  |
Mexican peso forward purchase contracts [Member] | Forward foreign exchange contracts [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Foreign exchange contracts of MXP |  | 26,100
Derivative Instruments Settle in Year One [Member] | Mexican peso forward purchase contracts [Member] | Forward foreign exchange contracts [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Foreign exchange contracts of MXP | $ 12,000 |

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- Definition Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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- Definition Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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