Additional Derivative Financial Instruments And Fair Value Of Financial Instruments.

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Derivative Average Price.

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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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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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-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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Net Increase or Decrease in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period.

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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 4C
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959

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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 open derivatives, commodity, or energy contracts, held at each balance sheet date, that was included in earnings for the period.

+ References

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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Derivative Financial Instruments (Details Textual) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) oz $ / oz	Mar. 31, 2016 USD ($)	Jan. 21, 2009 oz
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Gain (loss) on derivative instruments	$ (1,200)	$ (8,695)
Franco-Nevada warrant [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net	0	4,900
Realized losses		3,000
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
Concentrate Sales Contracts [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Unrealized Gain (Loss) on Derivatives and Commodity Contracts	1,400	600
Silver and gold options [Member]
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract]
Gain (loss) on derivative instruments		(1,568)
Derivative, Gain (Loss) on Derivative, Net	$ 0	$ (1,568)
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]
Outstanding provisionally priced sales consists of silver \| oz	79,084
Derivative Average Price \| $ / oz	18
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	29,603
Derivative Average Price \| $ / oz	1,211