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Derivative Financial Instruments (Details 2) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Fair value adjustments, net | $ 82,768 | $ (23,487) | $ (52,050)
Fair value adjustments, net | 80,928 | (23,426) | (49,162)
Concentrate Sales Contracts [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Sales of Metals | (1,995) | 1,682 | 2,505
Forward foreign exchange contract [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Production costs applicable to sales | 589 | (1,621) | 383
Fair value adjustments, net | (985) | 3,264 | (3,192)
Gold lease facility [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Fair value adjustments, net | 0 | 0 | (132)
Forward gold contract [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Fair value adjustments, net | 0 | 0 | 34
Silver Ounces Receivables [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Fair value adjustments, net | 0 | 213 | (276)
Palmarejo gold production royalty [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Fair value adjustments, net | 76,200 | (31,053) | (40,046)
Put and call options [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Fair value adjustments, net | $ 7,119 | $ 4,089 | $ (8,438)

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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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 02-3 -Paragraph 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + 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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