Additional Derivative Financial Instruments And Fair Value Of Financial Instruments.

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Annual Inflation Compounding Adjustment

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Derivative Average Price.

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Derivative, Weighted Average Strike Price of Put Options

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Fair Value, Asian Put Options

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Life of Mine Production, Percentage

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Minimum obligation paid in monthly payments.

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Outstanding provisionally priced sales consists of Gold.

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Outstanding provisionally priced sales consists of silver.

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Payable ounces under royalty obligation

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Percentage of Gold Production

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Price per ounce under agreement

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Remaining ounces under royalty obligation

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Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959

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-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (a),(c),(d),(e)
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959

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Amount of decrease in the fair value of derivatives recognized in the income statement.

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Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)
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Risk-free interest rate assumption used in valuing an instrument.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)
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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
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Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open derivatives, commodity, or energy contracts, held at each balance sheet date, that was included in earnings for the period.

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Derivative Financial Instruments (Details Textual)	3 Months Ended		12 Months Ended
Derivative Financial Instruments (Details Textual)	Mar. 31, 2016 USD ($) oz $ / oz	Mar. 31, 2015 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2015 USD ($)	Jan. 21, 2009
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Remaining ounces under royalty obligation \| oz	20,994
Fair Value Assumptions, Risk Free Interest Rate	12.40%	19.90%
Gain (loss) on derivative instruments	$ (8,695,000)	$ (4,884,000)
Price per ounce under agreement	416
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
Realized losses	$ 3,000,000	4,200,000
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	$ 600,000	900,000
Unrealized Gain (Loss) on Derivatives	566,000	914,000
Embedded Derivative Financial Instruments [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Gain (loss) on derivative instruments	(4,878,000)	(1,545,000)
Silver and gold options [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Gain (loss) on derivative instruments	(1,568,000)	(1,046,000)
Unrealized Gain (Loss) on Derivatives		0	$ 200,000
Mark-to-market gains and (losses) on forward foreign exchange contract	$ (1,600,000)	$ (800,000)
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 put options purchased [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Derivative, Weighted Average Strike Price of Put Options \| $ / oz	15.00
Derivative Instruments Settle in Year One [Member] \| Silver concentrate sales agreements [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Outstanding provisionally priced sales consists of silver \| oz	438,573
Derivative Average Price \| $ / oz	15.36
Derivative Instruments Settle in Year One [Member] \| Gold concentrates sales agreements [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Outstanding provisionally priced sales consists of Gold \| oz	38,773
Derivative Average Price \| $ / oz	1,183
Derivative Instruments Settle in Year One [Member] \| Silver Put Options Sold [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Notional ounces \| oz	300,000
Derivative, Weighted Average Strike Price of Put Options \| $ / oz	14.00
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, Asian Put Options	$ 100,000
Palmarejo Royalty Obligation [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	$ 6,827,000			$ 4,957,000