Derivative Financial Instruments (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair value of the derivative instruments
Derivative Asset, Fair Value	$ 135
Prepaid expenses and other [Member]
Fair value of the derivative instruments
Derivative Asset, Fair Value	184	1,406
Accrued liabilities and other [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value	1,640	2,488
Other long-term liabilities [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value		7,274
Current portion of royalty obligation [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value	17,650	41,146
Non-current portion of royalty obligation [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value	22,688	103,952
Forward foreign exchange contracts [Member] | Prepaid expenses and other [Member]
Fair value of the derivative instruments
Derivative Asset, Fair Value	38	376
Forward foreign exchange contracts [Member] | Accrued liabilities and other [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value	947	300
Forward foreign exchange contracts [Member] | Other long-term liabilities [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value
Forward foreign exchange contracts [Member] | Current portion of royalty obligation [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value
Forward foreign exchange contracts [Member] | Non-current portion of royalty obligation [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value
Palmarejo gold production royalty [Member] | Prepaid expenses and other [Member]
Fair value of the derivative instruments
Derivative Asset, Fair Value
Palmarejo gold production royalty [Member] | Accrued liabilities and other [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value
Palmarejo gold production royalty [Member] | Other long-term liabilities [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value
Palmarejo gold production royalty [Member] | Current portion of royalty obligation [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value	17,650	41,146
Palmarejo gold production royalty [Member] | Non-current portion of royalty obligation [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value	22,688	103,952
Put and call options, net [Member] | Prepaid expenses and other [Member]
Fair value of the derivative instruments
Derivative Asset, Fair Value	135
Put and call options, net [Member] | Accrued liabilities and other [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value		2,025
Put and call options, net [Member] | Other long-term liabilities [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value		7,274
Put and call options, net [Member] | Current portion of royalty obligation [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value
Put and call options, net [Member] | Non-current portion of royalty obligation [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value
Concentrate sales contracts [Member] | Prepaid expenses and other [Member]
Fair value of the derivative instruments
Derivative Asset, Fair Value	11	1,030
Concentrate sales contracts [Member] | Accrued liabilities and other [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value	693	163
Concentrate sales contracts [Member] | Other long-term liabilities [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value
Concentrate sales contracts [Member] | Current portion of royalty obligation [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value
Concentrate sales contracts [Member] | Non-current portion of royalty obligation [Member]
Fair value of the derivative instruments
Derivative Liability, Fair Value
Mexican peso forward purchase contracts [Member] | Forward foreign exchange contracts [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange contracts of MXP		26,100
Derivative Instruments Settle in Year One [Member] | Mexican peso forward purchase contracts [Member] | Forward foreign exchange contracts [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange contracts of MXP	$ 12,000