Derivative Financial Instruments (Details Textual)	12 Months Ended		3 Months Ended	12 Months Ended					12 Months Ended				12 Months Ended				12 Months Ended														12 Months Ended
	Dec. 31, 2014 USD ($) oz	Dec. 31, 2013	Mar. 31, 2014 Put Option [Member]	Dec. 31, 2014 Franco-Nevada warrant [Member] USD ($)	Dec. 31, 2013 Franco-Nevada warrant [Member] USD ($)	Dec. 31, 2012 Franco-Nevada warrant [Member] USD ($)	Dec. 31, 2014 Palmarejo gold production royalty [Member] oz	Jan. 21, 2009 Palmarejo gold production royalty [Member]	Dec. 31, 2014 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] USD ($)	Dec. 31, 2013 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] USD ($)	Dec. 31, 2012 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] USD ($)	Dec. 31, 2013 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] MXN	Dec. 31, 2014 Concentrate Sales Contracts [Member] USD ($)	Dec. 31, 2013 Concentrate Sales Contracts [Member] USD ($)	Dec. 31, 2012 Concentrate Sales Contracts [Member] USD ($)	Dec. 31, 2014 Gold Put Purchase and Call Sold Options Net [Member] USD ($)	Dec. 31, 2014 Silver and gold options [Member] USD ($)	Dec. 31, 2013 Silver and gold options [Member] USD ($)	Dec. 31, 2012 Silver and gold options [Member] USD ($)	Dec. 31, 2013 Kensington Term Facility [Member] Put Option [Member] oz	Dec. 31, 2013 Kensington Term Facility [Member] Gold Put Option [Member] Put Option [Member]	Dec. 31, 2013 Kensington Term Facility [Member] Put Option on Silver [Member] Put Option [Member]	Dec. 31, 2014 Maximum [Member] Palmarejo gold production royalty [Member] oz	Dec. 31, 2014 Derivative Instruments Settle in Year One [Member] Gold Put Option [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle in Year One [Member] Silver concentrate sales agreements [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle in Year One [Member] Gold concentrates sales agreements [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle in Year One [Member] Gold put options purchased [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle in Year One [Member] Silver put options purchased [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle in Year One [Member] Silver Put Options Sold [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle in Year One [Member] Kensington Term Facility [Member] Gold put options purchased [Member]	Dec. 31, 2014 Derivative Instruments Settle in Year One [Member] Kensington Term Facility [Member] Gold put options purchased [Member] Put Option [Member] USD ($)	Dec. 31, 2014 Derivative Instruments Settle in Year One [Member] Kensington Term Facility [Member] Silver put options purchased [Member] Put Option [Member] USD ($)	Dec. 31, 2014 Derivative Financial Instruments, Assets [Member] Gold put options purchased [Member] oz	Dec. 31, 2014 Derivative Financial Instruments, Assets [Member] Silver put options purchased [Member] oz	Dec. 31, 2014 Derivative Instruments Settle in Year Two [Member] Gold Put Option [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle in Year Two [Member] Silver concentrate sales agreements [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle in Year Two [Member] Gold concentrates sales agreements [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle in Year Two [Member] Gold put options purchased [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle in Year Two [Member] Silver put options purchased [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle in Year Two [Member] Silver Put Options Sold [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle Thereafter [Member] Gold Put Option [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle Thereafter [Member] Silver concentrate sales agreements [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle Thereafter [Member] Gold concentrates sales agreements [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle Thereafter [Member] Gold put options purchased [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle Thereafter [Member] Silver put options purchased [Member] USD ($) oz	Dec. 31, 2014 Derivative Instruments Settle Thereafter [Member] Silver Put Options Sold [Member] USD ($) oz	Dec. 31, 2014 Prepaid Expenses and Other Current Assets [Member] USD ($)	Dec. 31, 2013 Prepaid Expenses and Other Current Assets [Member] USD ($)	Dec. 31, 2013 Prepaid Expenses and Other Current Assets [Member] Forward foreign exchange contracts [Member] USD ($)	Dec. 31, 2014 Prepaid Expenses and Other Current Assets [Member] Gold Put Purchase and Call Sold Options Net [Member] USD ($)	Dec. 31, 2013 Prepaid Expenses and Other Current Assets [Member] Gold Put Purchase and Call Sold Options Net [Member] USD ($)
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Life of Mine Production, Percentage								50.00%
Fair Value, Asian Put Options																																																		$ 2,800,000	$ 100,000
Payment made for gold on the end of royalty obligation							4,167
Royalty Guarantees, Commitments, Ounces of Gold							315,085																400,000
Total gold remain outstanding	35,500,000						84,915
Fair Value Assumptions, Risk Free Interest Rate	11.80%	5.70%
Fair value liability of the embedded derivative					40,300,000
Company recognized Mark to Market loss				18,400,000		14,300,000
Company recognized Mark to Market gain					104,800,000
Percentage of Gold Production							50.00%
Derivative Average Gold Price in Excess of Minimum Contractual Deduction Rate	408
Annual Inflation Compounding Adjustment							1.00%
Realized losses				(20,400,000)	(28,600,000)	45,400,000											(600,000)	0	0
Foreign exchange contracts of MXP										12,000,000
Weighted average exchange rate									12.21
Weighted average exchange rate of MXP												14.80
Fair value of foreign exchange contracts									0	900
Derivative, Average Exchange Rate Floor										12.60
Derivative, Notional Amount										(45,000,000)														(12,600,000)	(10,392,000)	(35,576,000)	(14,400,000)	(11,250,000)	(10,000,000)						0	0	0	0	0	0	0	0	0	0	0	0
Mark-to-market gains and (losses) on forward foreign exchange contract									900,000	(600,000)	(1,600,000)
Derivative Liability, Fair Value																1,039,000
Weighted Average Call Feature of Each Collar																																18.00
Weighted Average Put Feature of Each Collar																															1,200
Contract expiration date			3 years
Notional ounces																											12,000	625,000					24,000	1,250,000		0	0	0	0			0	0	0	0
Average strike price																								1,050				18.00	16.00	1,200					0			0	0.00	0.00	0			0	0	0
Unrealized gain (loss)									0	1,000,000	3,300,000						1,500,000	8,900,000	8,600,000
Fair value of the contract																3,882,000																															3,925,000	184,000	38,000	3,882,000	135,000
Outstanding Put Options of Gold																				25,000				12,000											0						0
Weighted Average Strike Price of Put Options																					1,150	17.00																		16.00
Outstanding Put Options of Silver																				1,250,000									625,000											0						0
Unrealized Gain (Loss) on Derivatives and Commodity Contracts													$ (123,000)	$ (1,995,000)	$ 1,682,000
Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Outstanding provisionally priced sales consists of silver																									635,614
Outstanding provisionally priced sales consists of Gold																										29,137
Derivative Average Price																									16.35	1,221										0	0					0	0