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Derivative Financial Instruments (Details 1) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Prepaid expenses and other [Member] |  |
Fair value of the derivative instruments |  |
Fair value of derivative asset | $ 216 | $ 28
Accrued liabilities and other [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value | 64 | 536
Current portion of royalty obligation [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value | 6,827 | 4,957
Non-current portion of royalty obligation [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value | 0 | 0
Palmarejo gold production royalty [Member] | Current portion of royalty obligation [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value | 6,827 | 4,957
Palmarejo gold production royalty [Member] | Non-current portion of royalty obligation [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value | 0 | 0
Put and call options, net [Member] |  |
Fair value of the derivative instruments |  |
Fair value of derivative asset | 131 |
Derivative Liability, Fair Value | 36 |
Put and call options, net [Member] | Accrued liabilities and other [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value | 36 |
Put and call options, net [Member] | Non-current portion of royalty obligation [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value | 0 |
Concentrate sales contracts [Member] | Prepaid expenses and other [Member] |  |
Fair value of the derivative instruments |  |
Fair value of derivative asset | 85 | 28
Concentrate sales contracts [Member] | Accrued liabilities and other [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value | 28 | 536
Concentrate sales contracts [Member] | Non-current portion of royalty obligation [Member] |  |
Fair value of the derivative instruments |  |
Derivative Liability, Fair Value | $ 0 | $ 0

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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other 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. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: 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=51824906&loc=SL20225862-175312 Reference 2: 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=56946850&loc=SL5624163-113959 Reference 3: 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=51825145&loc=SL20226000-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=51814546&loc=SL51823488-111719 + Details
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