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Derivative Financial Instruments (Details) | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2014 USD ($) | Sep. 30, 2013 USD ($) | Sep. 30, 2014 USD ($) | Sep. 30, 2013 USD ($) | Sep. 30, 2014 Palmarejo gold production royalty [Member] 2013 [Member] USD ($) oz | Sep. 30, 2014 Palmarejo gold production royalty [Member] 2014 [Member] USD ($) oz | Sep. 30, 2014 Palmarejo gold production royalty [Member] 2015 [Member] USD ($) oz | Sep. 30, 2014 Palmarejo gold production royalty [Member] Thereafter [Member] USD ($) oz | Sep. 30, 2014 Mexico Peso Put Options [Member] 2014 [Member] USD ($) oz | Sep. 30, 2014 Mexico Peso Put Options [Member] 2014 [Member] MXN | Sep. 30, 2014 Mexico Peso Put Options [Member] 2015 [Member] USD ($) oz | Sep. 30, 2014 Mexico Peso Put Options [Member] 2015 [Member] MXN | Sep. 30, 2014 Mexico Peso Put Options [Member] Thereafter [Member] USD ($) oz | Sep. 30, 2014 Mexico Peso Put Options [Member] Thereafter [Member] MXN | Sep. 30, 2014 Mexico peso call options [Member] 2014 [Member] USD ($) oz | Sep. 30, 2014 Mexico peso call options [Member] 2014 [Member] MXN | Sep. 30, 2014 Mexico peso call options [Member] 2015 [Member] USD ($) oz | Sep. 30, 2014 Mexico peso call options [Member] 2015 [Member] MXN | Sep. 30, 2014 Mexico peso call options [Member] Thereafter [Member] USD ($) oz | Sep. 30, 2014 Mexico peso call options [Member] Thereafter [Member] MXN | Sep. 30, 2014 Silver concentrate sales agreements [Member] 2013 [Member] USD ($) oz | Sep. 30, 2014 Silver concentrate sales agreements [Member] 2014 [Member] USD ($) oz | Sep. 30, 2014 Silver concentrate sales agreements [Member] 2015 [Member] USD ($) oz | Sep. 30, 2014 Silver concentrate sales agreements [Member] Thereafter [Member] USD ($) oz | Sep. 30, 2014 Gold concentrates sales agreements [Member] 2013 [Member] USD ($) oz | Sep. 30, 2014 Gold concentrates sales agreements [Member] 2014 [Member] USD ($) oz | Sep. 30, 2014 Gold concentrates sales agreements [Member] 2015 [Member] USD ($) oz | Sep. 30, 2014 Gold concentrates sales agreements [Member] Thereafter [Member] USD ($) oz | Sep. 30, 2014 Gold put options purchased [Member] 2013 [Member] USD ($) oz | Sep. 30, 2014 Gold put options purchased [Member] 2014 [Member] USD ($) oz | Sep. 30, 2014 Gold put options purchased [Member] 2015 [Member] USD ($) oz | Sep. 30, 2014 Gold put options purchased [Member] Thereafter [Member] USD ($) oz | Sep. 30, 2014 Gold Put Option [Member] 2013 [Member] USD ($) | Sep. 30, 2014 Gold Put Option [Member] 2014 [Member] USD ($) | Sep. 30, 2014 Gold Put Option [Member] 2015 [Member] USD ($) | Sep. 30, 2014 Gold Put Option [Member] Thereafter [Member] USD ($) | Sep. 30, 2014 Silver put options purchased [Member] 2013 [Member] USD ($) oz | Sep. 30, 2014 Silver put options purchased [Member] 2014 [Member] USD ($) oz | Sep. 30, 2014 Silver put options purchased [Member] 2015 [Member] USD ($) oz | Sep. 30, 2014 Silver put options purchased [Member] Thereafter [Member] USD ($) oz | Sep. 30, 2014 Silver Put Options Sold [Member] 2013 [Member] USD ($) | Sep. 30, 2014 Silver Put Options Sold [Member] 2014 [Member] USD ($) | Sep. 30, 2014 Silver Put Options Sold [Member] 2015 [Member] USD ($) | Sep. 30, 2014 Silver Put Options Sold [Member] Thereafter [Member] USD ($) | Dec. 31, 2013 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] USD ($) | Dec. 31, 2013 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] MXN | Sep. 30, 2014 Mexico peso call options [Member] 2013 [Member] USD ($) oz | Sep. 30, 2014 Mexico peso call options [Member] 2013 [Member] MXN | Sep. 30, 2014 Mexico Peso Put Options [Member] 2013 [Member] USD ($) oz | Sep. 30, 2014 Mexico Peso Put Options [Member] 2013 [Member] MXN | Sep. 30, 2014 Line of Credit [Member] Gold put options purchased [Member] 2013 [Member]
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on derivative instruments | $ 16,105,000 | $ (20,646,000) | $ (3,611,000) | $ 63,905,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative instruments Settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  | 13,571,000 | 40,516,000 | 24,778,000 | 0 |  |  |  |  |  |  |  |  |  |  |  |  | 2,360,000 | 0 | 0 | 0 | 41,197,000 | 0 | 0 | 0 | 30,000,000 | 28,800,000 | 0 | 0 | 26,250,000 | 25,200,000 | 0 | 0 | 22,500,000 | 22,500,000 | 0 | 0 | 20,000,000 | 20,000,000 | 0 | 0 | 45,000,000 |  |  |  |  |  |
Derivative average gold price in excess of minimum contractual Deduction Rate | 408 |  | 408 |  | 814 | 808 | 810 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional ounces |  |  |  |  | 16,668 | 50,153 | 30,595 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  | 0 | 0 | 0 |  | 0 | 0 | 0 | 25,000 | 24,000 | 0 | 0 |  |  |  |  | 1,250,000 | 1,250,000 | 0 | 0 |  |  |  |  |  |  | 189,750,000 | 189,750,000 | 222,450,000 | 222,450,000 |
Foreign exchange contracts of MXP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,000,000 |  | 15,000,000 |  | 15,000,000 |  |
Fair value of foreign exchange contracts |  |  |  |  |  |  |  |  | $ 0 |  | $ 0 |  | $ 0 |  | $ 0 |  | $ 0 |  | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average rate (MXP/$) |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14.80 |  | 12.65 |  | 14.83 |
Derivative average price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18.87 | 0 | 0 | 0 | 1,253 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding Provisionally Priced Sales Consists of Gold |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 32,879 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding Provisionally Priced Sales Consists of Silver |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 125,078 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average strike price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,200 | 0 | 0 | 1,050 | 1,050 | 0 | 0 | 18.00 | 18.00 | 0 | 0 | 16.00 | 16.00 | 0 | 0 |  |  |  |  |  |  | 1,200

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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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