Derivative Financial Instruments (Details Textual)	3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended																	3 Months Ended
	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2014 Put Option [Member]	Sep. 30, 2014 Franco-Nevada warrant [Member] USD ($)	Sep. 30, 2013 Franco-Nevada warrant [Member] USD ($)	Sep. 30, 2014 Franco-Nevada warrant [Member] USD ($)	Sep. 30, 2013 Franco-Nevada warrant [Member] USD ($)	Dec. 31, 2013 Franco-Nevada warrant [Member] USD ($)	Sep. 30, 2014 Palmarejo gold production royalty [Member] USD ($) oz	Sep. 30, 2013 Palmarejo gold production royalty [Member] USD ($)	Sep. 30, 2014 Palmarejo gold production royalty [Member] USD ($) oz	Sep. 30, 2013 Palmarejo gold production royalty [Member] USD ($)	Jan. 21, 2009 Palmarejo gold production royalty [Member]	Sep. 30, 2014 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] USD ($)	Sep. 30, 2013 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] USD ($)	Sep. 30, 2014 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] USD ($)	Sep. 30, 2013 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] USD ($)	Dec. 31, 2013 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] USD ($)	Dec. 31, 2013 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] MXN	Sep. 30, 2014 Concentrate Sales Contracts [Member] USD ($)	Sep. 30, 2013 Concentrate Sales Contracts [Member] USD ($)	Sep. 30, 2014 Concentrate Sales Contracts [Member] USD ($)	Sep. 30, 2013 Concentrate Sales Contracts [Member] USD ($)	Sep. 30, 2014 Gold Put Purchase and Call Sold Options Net [Member] USD ($)	Sep. 30, 2014 Commodity [Member] USD ($)	Sep. 30, 2013 Commodity [Member] USD ($)	Sep. 30, 2014 Commodity [Member] USD ($)	Sep. 30, 2013 Commodity [Member] USD ($)	Sep. 30, 2014 Silver and gold options [Member] USD ($)	Sep. 30, 2013 Silver and gold options [Member] USD ($)	Sep. 30, 2014 Silver and gold options [Member] USD ($)	Sep. 30, 2013 Silver and gold options [Member] USD ($)	Dec. 31, 2013 Kensington Term Facility [Member] Put Option [Member] oz	Dec. 31, 2013 Kensington Term Facility [Member] Gold Put Option [Member] Put Option [Member]	Dec. 31, 2013 Kensington Term Facility [Member] Put Option on Silver [Member] Put Option [Member]	Sep. 30, 2014 Maximum [Member] Palmarejo gold production royalty [Member] oz	Sep. 30, 2014 Derivative Instruments Settle in Year One [Member] Gold Put Option [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year One [Member] Silver concentrate sales agreements [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year One [Member] Gold concentrates sales agreements [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year One [Member] Gold put options purchased [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year One [Member] Silver put options purchased [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year One [Member] Silver Put Options Sold [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year One [Member] Mexico Peso Call Options [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year One [Member] Mexico Peso Call Options [Member] MXN	Sep. 30, 2014 Derivative Instruments Settle in Year One [Member] Mexico Peso Put Options [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year One [Member] Mexico Peso Put Options [Member] MXN	Sep. 30, 2014 Derivative Instruments Settle in Year One [Member] Kensington Term Facility [Member] Gold put options purchased [Member]	Sep. 30, 2014 Derivative Instruments Settle in Year One [Member] Kensington Term Facility [Member] Gold put options purchased [Member] Put Option [Member] USD ($)	Sep. 30, 2014 Derivative Instruments Settle in Year One [Member] Kensington Term Facility [Member] Silver put options purchased [Member] Put Option [Member] USD ($)	Sep. 30, 2014 Derivative Financial Instruments, Assets [Member] Gold put options purchased [Member] oz	Sep. 30, 2014 Derivative Financial Instruments, Assets [Member] Silver put options purchased [Member] oz	Sep. 30, 2014 Derivative Instruments Settle in Year Two [Member] Gold Put Option [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year Two [Member] Silver concentrate sales agreements [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year Two [Member] Gold concentrates sales agreements [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year Two [Member] Mexico Peso Put Options [Member] MXN oz	Sep. 30, 2014 Derivative Instruments Settle in Year Two [Member] Gold put options purchased [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year Two [Member] Silver put options purchased [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year Two [Member] Silver Put Options Sold [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year Three [Member] Gold Put Option [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year Three [Member] Silver concentrate sales agreements [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year Three [Member] Gold concentrates sales agreements [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year Three [Member] Mexico Peso Put Options [Member] MXN oz	Sep. 30, 2014 Derivative Instruments Settle in Year Three [Member] Gold put options purchased [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year Three [Member] Silver put options purchased [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle in Year Three [Member] Silver Put Options Sold [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle Thereafter [Member] Gold Put Option [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle Thereafter [Member] Silver concentrate sales agreements [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle Thereafter [Member] Gold concentrates sales agreements [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle Thereafter [Member] Mexico Peso Put Options [Member] MXN oz	Sep. 30, 2014 Derivative Instruments Settle Thereafter [Member] Gold put options purchased [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle Thereafter [Member] Silver put options purchased [Member] USD ($) oz	Sep. 30, 2014 Derivative Instruments Settle Thereafter [Member] Silver Put Options Sold [Member] USD ($) oz	Sep. 30, 2014 Prepaid Expenses and Other Current Assets [Member] USD ($)	Dec. 31, 2013 Prepaid Expenses and Other Current Assets [Member] USD ($)	Sep. 30, 2014 Prepaid Expenses and Other Current Assets [Member] Palmarejo gold production royalty [Member] USD ($)	Dec. 31, 2013 Prepaid Expenses and Other Current Assets [Member] Palmarejo gold production royalty [Member] USD ($)	Sep. 30, 2014 Prepaid Expenses and Other Current Assets [Member] Forward foreign exchange contracts [Member] USD ($)	Dec. 31, 2013 Prepaid Expenses and Other Current Assets [Member] Forward foreign exchange contracts [Member] USD ($)	Sep. 30, 2014 Prepaid Expenses and Other Current Assets [Member] Gold Put Purchase and Call Sold Options Net [Member] USD ($)	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																																																																																	$ 3,600,000	$ 100,000
Gain (loss) on derivative instruments	16,105,000	(20,646,000)	(3,611,000)	63,905,000							8,736,000	(15,279,000)	(6,560,000)	60,216,000																	3,081,000	(3,104,000)	213,000	7,474,000
Payment made for gold on the end of royalty obligation											4,167		4,167
Royalty Guarantees, Commitments, Ounces of Gold											302,584		302,584																									400,000
Total gold remain outstanding											97,416		97,416
Fair Value Assumptions, Risk Free Interest Rate	7.782%	5.70%
Fair value liability of the embedded derivative										40,300,000
Company recognized Mark to Market loss							15,300,000	(6,600,000)
Company recognized Mark to Market gain						(8,700,000)			60,200,000
Percentage of Gold Production											50.00%		50.00%
Derivative Average Gold Price in Excess of Minimum Contractual Deduction Rate	408		408
Annual Inflation Compounding Adjustment											1.00%		1.00%
Realized losses						(5,000,000)	(5,600,000)	(16,600,000)	(22,900,000)
Foreign exchange contracts of MXP																				12,000,000																									15,000,000		15,000,000
Weighted average exchange rate																			12.21
Weighted average exchange rate of MXP																					14.80																									12.65		14.83									0							0							0
Fair value of foreign exchange contracts																0		0		900
Derivative, Average Exchange Rate Floor																				12.60	12.60
Derivative, Notional Amount																				(45,000,000)																			(26,250,000)	(2,360,000)	(41,197,000)	(30,000,000)	(22,500,000)	(20,000,000)										(25,200,000)	0	0		(28,800,000)	(22,500,000)	(20,000,000)	0	0	0		0	0	0	0	0	0		0	0	0
Mark-to-market gains and (losses) on forward foreign exchange contract																0	100,000	900,000	(700,000)								(400,000)	900,000	1,300,000	1,400,000
Derivative Liability, Fair Value																										1,331,000
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																																										25,000	1,250,000		189,750,000	189,750,000	222,450,000	222,450,000				49,000	2,500,000		0	0	0	24,000	1,250,000			0	0	0	0	0			0	0	0	0	0
Average strike price																																							1,050				18.00	16.00					1,200					1,050				1,200	18.00	16.00	0				0	0	0	0				0	0	0
Unrealized gain (loss)																	100,000	900,000	(1,400,000)
Fair value of the contract																										4,939,000																																																	4,962,000	184,000				38,000	4,939,000	135,000
Outstanding Put Options of Gold																																			25,000				25,000															24,000							0							0
Weighted Average Strike Price of Put Options																																				1,150	17.00																							16.00
Outstanding Put Options of Silver																																			1,250,000									1,250,000																1,250,000							0							0
Sales of Metals																						$ (684,000)	$ 718,000	$ (188,000)	$ (2,037,000)
Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Outstanding provisionally priced sales consists of silver																																								125,078
Outstanding provisionally priced sales consists of Gold																																									32,879
Derivative Average Price																																								18.87	1,253														0	0						0	0						0	0