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Fair Value Measurements Fair Value Measurements (Details 4) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013
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Portion at Other than Fair Value, Fair Value Disclosure [Member] | Convertible Senior Notes Due March 2028 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Financial Liabilities Not Measured at Fair Value | $ 5,281 | $ 5,067
Portion at Other than Fair Value, Fair Value Disclosure [Member] | Convertible Senior Notes Due March 2028 [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Financial Liabilities Not Measured at Fair Value | 0 | 5,067
Portion at Other than Fair Value, Fair Value Disclosure [Member] | Convertible Senior Notes Due March 2028 [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Financial Liabilities Not Measured at Fair Value | 5,281 | 0
Portion at Other than Fair Value, Fair Value Disclosure [Member] | Convertible Senior Notes Due March 2028 [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Financial Liabilities Not Measured at Fair Value | 0 | 0
Portion at Other than Fair Value, Fair Value Disclosure [Member] | Senior Notes due 2021 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair value of long-term debt | 454,127 | 307,314
Portion at Other than Fair Value, Fair Value Disclosure [Member] | Senior Notes due 2021 [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair value of long-term debt | 0 | 307,314
Portion at Other than Fair Value, Fair Value Disclosure [Member] | Senior Notes due 2021 [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair value of long-term debt | 454,127 | 0
Portion at Other than Fair Value, Fair Value Disclosure [Member] | Senior Notes due 2021 [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair value of long-term debt | 0 | 0
Portion at Other than Fair Value, Fair Value Disclosure [Member] | Palmarejo gold production royalty [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Financial Liabilities Not Measured at Fair Value | 57,377 | 65,212
Portion at Other than Fair Value, Fair Value Disclosure [Member] | Palmarejo gold production royalty [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Financial Liabilities Not Measured at Fair Value | 0 | 0
Portion at Other than Fair Value, Fair Value Disclosure [Member] | Palmarejo gold production royalty [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Financial Liabilities Not Measured at Fair Value | 0 | 0
Portion at Other than Fair Value, Fair Value Disclosure [Member] | Palmarejo gold production royalty [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Financial Liabilities Not Measured at Fair Value | 57,377 | 65,212
Reported Value Measurement [Member] | Convertible Senior Notes Due March 2028 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Financial Liabilities Not Measured at Fair Value | 5,334 | 5,334
Reported Value Measurement [Member] | Senior Notes due 2021 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair value of long-term debt | 452,964 | 300,000
Reported Value Measurement [Member] | Palmarejo gold production royalty [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Financial Liabilities Not Measured at Fair Value | $ 45,980 | $ 51,193

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- Definition Fair value before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226000-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 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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- Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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