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Derivative Financial Instruments (Details 2) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Fair value adjustments, net | $ (8,282) | $ 66,754 | $ (19,717) | $ 84,550
Fair value adjustments, net | (6,438) | 66,290 | (17,259) | 82,958
Mexican peso forward purchase contracts [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Fair value adjustments, net | (10) | (2,260) | 957 | (1,522)
Concentrate Sales Contracts [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Sales of Metals | 7 | (667) | 872 | (2,422)
Forward foreign exchange contract [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Costs applicable to sales | 0 | 203 | 924 | (830)
Fair value adjustments, net | (10) | (662) | 957 | (1,522)
Forward Contracts [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Fair value adjustments, net | 0 | 1,598 | 0 | 0
Palmarejo gold production royalty [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Fair value adjustments, net | (5,061) | 61,066 | (15,296) | 75,495
Gold Put Purchase and Call Sold Options Net [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Fair value adjustments, net | $ (1,374) | $ 6,350 | $ (2,868) | $ 10,577

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- Definition Sales of metals. + References No definition available. + Details
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- Definition Aggregate net gain and losses (whether realized or unrealized) on all derivative instruments held for trading purposes whether or not settled physically. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41322-113958 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4F -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624186-113959 + Details
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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959 + Details
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