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Derivative Financial Instruments (Details) | 3 Months Ended |  |  |  |  |  |  |  |  |  | 3 Months Ended
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Mar. 31, 2014 USD ($) | Mar. 31, 2013 USD ($) | Dec. 31, 2013 oz | Mar. 31, 2014 Palmarejo gold production royalty [Member] 2013 [Member] USD ($) oz | Mar. 31, 2014 Palmarejo gold production royalty [Member] 2014 [Member] USD ($) oz | Mar. 31, 2014 Palmarejo gold production royalty [Member] 2015 [Member] USD ($) oz | Mar. 31, 2014 Palmarejo gold production royalty [Member] Thereafter [Member] USD ($) oz | Mar. 31, 2014 Mexico Peso Put Options [Member] 2013 [Member] oz | Mar. 31, 2014 Mexico Peso Put Options [Member] 2014 [Member] USD ($) oz | Mar. 31, 2014 Mexico Peso Put Options [Member] 2014 [Member] MXN | Mar. 31, 2014 Mexico Peso Put Options [Member] 2015 [Member] USD ($) oz | Mar. 31, 2014 Mexico Peso Put Options [Member] 2015 [Member] MXN | Mar. 31, 2014 Mexico Peso Put Options [Member] Thereafter [Member] USD ($) oz | Mar. 31, 2014 Mexico Peso Put Options [Member] Thereafter [Member] MXN | Mar. 31, 2014 Mexico peso call options [Member] 2013 [Member] oz | Mar. 31, 2014 Mexico peso call options [Member] 2014 [Member] USD ($) oz | Mar. 31, 2014 Mexico peso call options [Member] 2014 [Member] MXN | Mar. 31, 2014 Mexico peso call options [Member] 2015 [Member] USD ($) oz | Mar. 31, 2014 Mexico peso call options [Member] 2015 [Member] MXN | Mar. 31, 2014 Mexico peso call options [Member] Thereafter [Member] USD ($) oz | Mar. 31, 2014 Mexico peso call options [Member] Thereafter [Member] MXN | Mar. 31, 2014 Silver concentrate sales agreements [Member] 2013 [Member] USD ($) oz | Dec. 31, 2013 Silver concentrate sales agreements [Member] 2013 [Member] oz | Mar. 31, 2014 Silver concentrate sales agreements [Member] 2014 [Member] USD ($) oz | Mar. 31, 2014 Silver concentrate sales agreements [Member] 2015 [Member] USD ($) oz | Mar. 31, 2014 Silver concentrate sales agreements [Member] Thereafter [Member] USD ($) oz | Mar. 31, 2014 Gold concentrates sales agreements [Member] 2013 [Member] USD ($) oz | Dec. 31, 2013 Gold concentrates sales agreements [Member] 2013 [Member] | Mar. 31, 2014 Gold concentrates sales agreements [Member] 2014 [Member] USD ($) oz | Mar. 31, 2014 Gold concentrates sales agreements [Member] 2015 [Member] USD ($) oz | Mar. 31, 2014 Gold concentrates sales agreements [Member] Thereafter [Member] USD ($) oz | Mar. 31, 2014 Gold put options purchased [Member] 2013 [Member] USD ($) oz | Mar. 31, 2014 Gold put options purchased [Member] 2014 [Member] USD ($) oz | Mar. 31, 2014 Gold put options purchased [Member] 2015 [Member] USD ($) oz | Mar. 31, 2014 Gold put options purchased [Member] Thereafter [Member] USD ($) oz | Mar. 31, 2014 Gold call options sold [Member] 2013 [Member] USD ($) | Mar. 31, 2014 Gold call options sold [Member] 2014 [Member] oz | Mar. 31, 2014 Silver put options purchased [Member] 2013 [Member] USD ($) oz | Mar. 31, 2014 Silver put options purchased [Member] 2014 [Member] USD ($) oz | Mar. 31, 2014 Silver put options purchased [Member] 2015 [Member] USD ($) oz | Mar. 31, 2014 Silver put options purchased [Member] Thereafter [Member] USD ($) oz | Mar. 31, 2014 Silver Put Options Sold [Member] 2014 [Member] USD ($) oz | Dec. 31, 2013 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] USD ($) | Dec. 31, 2013 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] MXN | Mar. 31, 2014 Mexico peso call options [Member] Mexican peso forward purchase contracts [Member] 2013 [Member] USD ($) | Mar. 31, 2014 Mexico peso call options [Member] Mexican peso forward purchase contracts [Member] 2013 [Member] MXN | Mar. 31, 2014 Mexico Peso Put Options [Member] 2013 [Member] USD ($) | Mar. 31, 2014 Mexico Peso Put Options [Member] 2013 [Member] MXN | Dec. 31, 2013 Line of Credit [Member] Put Option [Member] oz | Mar. 31, 2014 Line of Credit [Member] Put Option [Member] Gold put options purchased [Member] 2013 [Member] USD ($) | Mar. 31, 2014 Line of Credit [Member] Put Option [Member] Silver put options purchased [Member] 2013 [Member] USD ($)
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | $ (11,436,000) | $ 17,796,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative instruments Settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  | 21,708,000 | 24,764,000 | 14,860,000 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,041,000 |  | 0 | 0 | 0 | 24,204,000 |  | 0 | 0 | 0 | 60,000,000 | 0 | 0 | 0 | (52,500,000) |  | 45,000,000 | 0 | 0 | 0 | (40,000,000) | 45,000,000 |  |  |  |  |  |  |  |
Weighted Average Call Feature of Each Collar |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18.00
Weighted Average Put Feature of Each Collar |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,200 |
Derivative average gold price in excess of minimum contractual Deduction Rate | 408 |  |  | 498 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional ounces |  |  |  | 43,602 | 50,153 | 30,348 | 0 | 524,300,000 | 0 | 0 | 0 | 0 | 0 | 0 | 439,600,000 | 0 | 0 | 0 | 0 | 0 | 0 |  |  | 0 | 0 | 0 |  |  | 0 | 0 | 0 | 50,000 | 0 | 0 | 0 |  |  | 2,500,000 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |
Foreign exchange contracts of MXP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,000,000 |  | 35,000,000 |  | 35,000,000 |  |  |  |
Fair value of foreign exchange contracts |  |  |  |  |  |  |  |  | $ 0 |  | $ 0 |  | $ 0 |  |  | $ 0 |  | $ 0 |  | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average rate (MXP/$) |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |  |  | 0 |  | 0 |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14.80 |  | 12.56 |  | 14.98 |  |  |
Derivative average price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20.47 | 20.98 | 0 | 0 | 0 | 1,310 | 1,259 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding Provisionally Priced Sales Consists of Gold |  |  | 30,780 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18,471 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding Provisionally Priced Sales Consists of Silver |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 148,594 | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average strike price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0 |  |  |  | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |
Weighted Average Strike Price of Put Options |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,050 |  |  |  |  | 16.00 |  |  |  |  |  |  |  |  |
Outstanding Put Options of Gold |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50,000 |  |  |  |  |  |  |  |  |  |  |  | 25,000 |  |
Outstanding Put Options of Silver |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,500,000 |  |  |  |  |  |  | 1,250,000 |  |

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- Definition Derivative Average Gold Price In Excess Of Minimum Contractual Deduction Rate. + References No definition available. + Details
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- Details
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- Definition Fair value of foreign exchange contracts. + References No definition available. + Details
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- Definition Foreign exchange contracts of MXP. + References No definition available. + Details
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- Definition Outstanding provisionally priced sales consists of Gold. + References No definition available. + Details
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- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + 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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