Derivative Financial Instruments (Details Textual)	12 Months Ended
	Dec. 31, 2015 USD ($) oz $ / oz	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Jan. 21, 2009
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Gain (loss) on derivative instruments	$ 5,202,000	$ 3,618,000	$ 82,768,000
Remaining ounces under royalty obligation | oz	33,495
Fair Value Assumptions, Risk Free Interest Rate	19.90%	11.80%
Price per ounce under agreement	$ 412
Put Option [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Contract expiration date	3 years
Franco-Nevada warrant [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Fair value liability of the embedded derivative	$ 5,000,000	$ 21,900,000
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net	17,000,000	18,400,000	104,800,000
Realized losses	$ 13,900,000	20,400,000	28,600,000
Palmarejo gold production royalty [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Production to be sold, percent				50.00%
Payment made for gold on the end of royalty obligation | oz	4,167
Percentage of Gold Production	50.00%
Annual Inflation Compounding Adjustment	1.00%
Concentrate Sales Contracts [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Unrealized Gain (Loss) on Derivatives and Commodity Contracts	$ 300,000	100,000	2,000,000
Unrealized Gain (Loss) on Derivatives	296,000	(123,000)	(1,995,000)
Gold Put Purchase and Call Sold Options Net [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Derivative Liability, Fair Value		1,039,000
Embedded Derivative Financial Instruments [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Gain (loss) on derivative instruments	3,101,000	(2,001,000)	76,200,000
Derivative Liability, Fair Value		21,912,000
Silver and gold options [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Gain (loss) on derivative instruments	1,283,000	1,058,000	7,119,000
Mark-to-market gains and (losses) on forward foreign exchange contract	$ (1,300,000)	(600,000)	0
Unrealized Gain (Loss) on Derivatives		1,500,000	$ 8,900,000
Maximum [Member] | Palmarejo gold production royalty [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Payable ounces under royalty obligation | oz	400,000
Derivative Instruments Settle in Year One [Member] | Silver concentrate sales agreements [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Derivative, Notional Amount	$ (8,849,000)
Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Outstanding provisionally priced sales consists of silver | oz	590,750
Derivative Average Price | $ / oz	14.98
Derivative Instruments Settle in Year One [Member] | Gold concentrates sales agreements [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Derivative, Notional Amount	$ (33,996,000)
Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Outstanding provisionally priced sales consists of Gold | oz	30,627
Derivative Average Price | $ / oz	1,110
Derivative Instruments Settle Thereafter [Member] | Silver concentrate sales agreements [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Derivative, Notional Amount	$ 0
Notional ounces | oz	0
Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Derivative Average Price | $ / oz	0
Derivative Instruments Settle Thereafter [Member] | Gold concentrates sales agreements [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Derivative, Notional Amount	$ 0
Notional ounces | oz	0
Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Derivative Average Price | $ / oz	0
Prepaid Expenses and Other Current Assets [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Fair value of the contract	$ 28,000	3,925,000
Prepaid Expenses and Other Current Assets [Member] | Gold Put Purchase and Call Sold Options Net [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Fair value of the contract		$ 3,882,000