Derivative Average Price.

No definition available.

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- Details

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- Definition

Outstanding provisionally priced sales consists of Gold.

+ References

No definition available.

+ Details

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- Definition

Outstanding provisionally priced sales consists of silver.

+ References

No definition available.

+ Details

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- Definition

Price per ounce under agreement

+ References

No definition available.

+ Details

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- Definition

Weighted Average Strike Price Of Put Options.

+ References

No definition available.

+ Details

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- Definition

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

+ Details

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- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ 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

+ Details

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Period Type:	instant

- Definition

The average strike price on the group of price risk option contracts such as put options or call options.

+ References

No definition available.

+ Details

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- Details

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- Definition

Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

+ References

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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Derivative Financial Instruments (Details) (USD $)	3 Months Ended
Derivative Financial Instruments (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Derivative [Line Items]
Gain (loss) on derivative instruments	$ (4,884,000)	$ (11,436,000)
Derivative instruments Settlement
Price per ounce under agreement	412cde_Priceperounceunderagreement
Palmarejo gold production royalty [Member] \| 2013 [Member]
Derivative instruments Settlement
Derivative, notional amount	39,043,000
Price per ounce under agreement	781
Notional ounces	50,004
Palmarejo gold production royalty [Member] \| 2014 [Member]
Derivative instruments Settlement
Derivative, notional amount	23,712,000
Price per ounce under agreement	771
Notional ounces	30,744
Palmarejo gold production royalty [Member] \| Thereafter [Member]
Derivative instruments Settlement
Derivative, notional amount	0
Price per ounce under agreement	0
Notional ounces	0
Silver concentrate sales agreements [Member] \| 2013 [Member]
Derivative instruments Settlement
Derivative, notional amount	9,129,000
Derivative average price	16.67
Outstanding Provisionally Priced Sales Consists of Silver	547,611
Silver concentrate sales agreements [Member] \| 2014 [Member]
Derivative instruments Settlement
Derivative, notional amount	0
Notional ounces	0
Derivative average price	0
Silver concentrate sales agreements [Member] \| Thereafter [Member]
Derivative instruments Settlement
Derivative, notional amount	0
Notional ounces	0
Derivative average price	0
Gold concentrates sales agreements [Member] \| 2013 [Member]
Derivative instruments Settlement
Derivative, notional amount	40,495,000
Derivative average price	1,224
Outstanding Provisionally Priced Sales Consists of Gold	33,084
Gold concentrates sales agreements [Member] \| 2014 [Member]
Derivative instruments Settlement
Derivative, notional amount	0
Notional ounces	0
Derivative average price	0
Gold concentrates sales agreements [Member] \| Thereafter [Member]
Derivative instruments Settlement
Derivative, notional amount	0
Notional ounces	0
Derivative average price	0
Gold Put Option [Member] \| 2013 [Member]
Derivative instruments Settlement
Weighted Average Strike Price of Put Options			1,050
Silver put options purchased [Member] \| 2013 [Member]
Derivative instruments Settlement
Derivative, notional amount	45,900,000
Notional ounces	2,700,000
Average strike price	17.00
Silver put options purchased [Member] \| 2014 [Member]
Derivative instruments Settlement
Derivative, notional amount	0
Notional ounces	0
Average strike price	0.00
Silver put options purchased [Member] \| Thereafter [Member]
Derivative instruments Settlement
Derivative, notional amount	0
Notional ounces	0
Average strike price	0
Silver Put Options Sold [Member] \| 2013 [Member]
Derivative instruments Settlement
Derivative, notional amount	41,850,000
Average strike price	15.50
Silver Put Options Sold [Member] \| 2014 [Member]
Derivative instruments Settlement
Derivative, notional amount	0
Weighted Average Strike Price of Put Options	15.50		16.00
Average strike price	0.00
Silver Put Options Sold [Member] \| Thereafter [Member]
Derivative instruments Settlement
Derivative, notional amount	$ 0
Average strike price	0
Line of Credit [Member] \| Put Option [Member] \| Gold put options purchased [Member] \| 2013 [Member]
Derivative instruments Settlement
Weighted Average Strike Price of Put Options			1,200
Line of Credit [Member] \| Put Option [Member] \| Silver put options purchased [Member] \| 2013 [Member]
Derivative instruments Settlement
Weighted Average Strike Price of Put Options	17.00		18.00