Derivative Financial Instruments and Fair Value of Financial Instruments (Details Textual)	3 Months Ended	9 Months Ended	12 Months Ended								3 Months Ended		9 Months Ended			9 Months Ended					3 Months Ended			9 Months Ended				3 Months Ended		9 Months Ended
	Sep. 30, 2013 USD ($) oz	Sep. 30, 2013 USD ($) oz	Dec. 31, 2012 USD ($) oz	Sep. 30, 2013 MXN	Dec. 31, 2012 MXN	Sep. 30, 2012 oz	Sep. 30, 2013 Call Option [Member] oz	Dec. 31, 2012 Call Option [Member] oz	Sep. 30, 2013 Put Option [Member] oz	Dec. 31, 2012 Put Option [Member] oz	Sep. 30, 2013 Franco-Nevada warrant [Member] USD ($)	Mar. 31, 2012 Franco-Nevada warrant [Member] USD ($)	Sep. 30, 2013 Franco-Nevada warrant [Member] USD ($)	Sep. 30, 2012 Franco-Nevada warrant [Member] USD ($)	Dec. 31, 2012 Franco-Nevada warrant [Member] USD ($)	Sep. 30, 2013 Gold Put Options Sold [Member] USD ($)	Sep. 30, 2013 Gold call options sold [Member] USD ($)	Sep. 30, 2013 Palmarejo gold production royalty [Member] oz	Dec. 31, 2012 Palmarejo gold production royalty [Member]	Jan. 21, 2009 Palmarejo gold production royalty [Member]	Sep. 30, 2013 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] USD ($)	Sep. 30, 2012 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] USD ($)	Mar. 31, 2012 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] USD ($)	Sep. 30, 2012 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] USD ($)	Dec. 31, 2012 Forward foreign exchange contracts [Member] Mexican peso forward purchase contracts [Member] USD ($)	Sep. 30, 2013 Silver [Member] Cerro Bayo Mine [Member] USD ($)	Dec. 31, 2012 Silver [Member] Cerro Bayo Mine [Member] USD ($)	Sep. 30, 2013 Commodity [Member] USD ($)	Sep. 30, 2012 Commodity [Member] USD ($)	Sep. 30, 2013 Commodity [Member] USD ($)	Sep. 30, 2012 Commodity [Member] USD ($)	Sep. 30, 2013 Derivative Instruments Settle in Year Two [Member] Gold put options purchased [Member] USD ($) oz	Sep. 30, 2013 Derivative Instruments Settle in Year Two [Member] Mexican peso forward purchase contracts [Member] USD ($)	Sep. 30, 2013 Derivative Instruments Settle in Year Two [Member] Mexican peso forward purchase contracts [Member] MXN	Sep. 30, 2013 Derivative Instruments Settle in Year Two [Member] Silver put options purchased [Member] USD ($) oz	Sep. 30, 2013 Derivative Instruments Settle in Year Three [Member] Gold put options purchased [Member] USD ($) oz	Sep. 30, 2013 Derivative Instruments Settle in Year Three [Member] Mexican peso forward purchase contracts [Member] USD ($)	Sep. 30, 2013 Derivative Instruments Settle in Year Three [Member] Mexican peso forward purchase contracts [Member] MXN	Sep. 30, 2013 Derivative Instruments Settle in Year Three [Member] Silver put options purchased [Member] USD ($) oz	Sep. 30, 2013 Derivative Instruments Settle Thereafter [Member] Gold put options purchased [Member] USD ($) oz	Sep. 30, 2013 Derivative Instruments Settle Thereafter [Member] Mexican peso forward purchase contracts [Member] USD ($)	Sep. 30, 2013 Derivative Instruments Settle Thereafter [Member] Mexican peso forward purchase contracts [Member] MXN	Sep. 30, 2013 Derivative Instruments Settle Thereafter [Member] Silver put options purchased [Member] USD ($) oz	Sep. 30, 2013 Derivative Instruments Settle in Year One [Member] Gold put options purchased [Member] USD ($) oz	Sep. 30, 2013 Derivative Instruments Settle in Year One [Member] Mexican peso forward purchase contracts [Member] USD ($)	Sep. 30, 2013 Derivative Instruments Settle in Year One [Member] Mexican peso forward purchase contracts [Member] MXN	Sep. 30, 2013 Derivative Instruments Settle in Year One [Member] Silver put options purchased [Member] USD ($) oz	Sep. 30, 2013 Maximum [Member] Palmarejo gold production royalty [Member] oz	Sep. 30, 2013 Mexican Peso To United States Dollar [Member] MXN	Sep. 30, 2013 Prepaid Expenses and Other Current Assets [Member] USD ($)	Dec. 31, 2012 Prepaid Expenses and Other Current Assets [Member] USD ($)	Sep. 30, 2013 Prepaid Expenses and Other Current Assets [Member] Palmarejo gold production royalty [Member] USD ($)	Dec. 31, 2012 Prepaid Expenses and Other Current Assets [Member] Palmarejo gold production royalty [Member] USD ($)	Sep. 30, 2013 Prepaid Expenses and Other Current Assets [Member] Gold Put Purchase and Call Sold Options Net [Member] USD ($)	Dec. 31, 2012 Prepaid Expenses and Other Current Assets [Member] Gold Put Purchase and Call Sold Options Net [Member] USD ($)
Derivative [Line Items]
Derivative, Notional Amount																																$ 0		146,460,000	$ 0	$ 0		0	$ 0	$ 0		0	$ 0	$ (382,000)		154,816	$ (186,000)
Life of Mine Production, Percentage																				50.00%
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Payment made for gold on the end of royalty obligation																		4,167
Percentage of Gold Production																		50.00%
Derivative Average Gold Price in Excess of Minimum Contractual Deduction Rate	400	400
Annual Inflation Compounding Adjustment																		1.00%
Royalty Guarantees, Commitments, Amount																																																400,000
Total gold remain outstanding	156,493,000	156,493,000																156,493,000
Fair Value Assumptions, Risk Free Interest Rate	6.26%		4.20%
Derivative, Average Forward Price																		1,337	1,694
Fair value liability of the embedded derivative											62,000,000		62,000,000		145,100,000
Company recognized Mark to Market loss											9,600,000	23,400,000	83,100,000	10,900,000
Realized losses on settlement of the liabilities											5,600,000	10,900,000	22,900,000	35,000,000
Weighted average exchange rate					13.11																													12.20				0.00				0				12.90			12.55
Derivative, Fair Value, Net			9,300,000																		(24,000,000)				0																									211,000	1,406,000
Weighted Average Strike Price of Put Options				12,500
Fair value of foreign exchange contracts	1,300,000	1,300,000																															12,000,000				0				0				12,000,000
Mark-to-market gains and losses on forward foreign exchange contract	400,000	1,100,000																			0	600,000	1,400,000	3,400,000
Mark-to-market Realized gains on forward foreign exchange contract																					100,000	400,000	700,000	1,500,000
Notional amount of foreign currency derivatives																					24,000,000				26,100,000
Weighted Average Strike Price of Call Options Written				15.06
Gold under collars protection							12,500	97,000	25,000	122,000
Gold put options settled	97,000	97,000
Outstanding Call Options of Gold						84,500
Derivative Average Price																																0			0	0			0	0			0	1,200			0
Fair Value, Asian Put Options																																																						160,000
Unrealized Gain/Loss, Asian Put Options	400,000
Weighted Average Put Feature of Each Collar			967.86
Weighted Average Call Feature of Each Collar			1,967.89
Contract expiration date									3 years
Unrealized gain																0	0											2,400,000	3,600,000	9,300,000	1,400,000
Fair value of the contract	160,000	160,000																								0	33,200,000
Derivative, Nonmonetary Notional Amount																																0			0	0			0	0			0	25,000			1,250,000
Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Outstanding provisionally priced sales consists of silver	100,000	100,000	400,000
Outstanding provisionally priced sales consists of Gold	26,265	26,265	11,957
Outstanding provisionally priced sales	$ 0	$ 0	$ 34,100,000