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Debt (Details Textual) (USD $) | 3 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  |  | 0 Months Ended | 3 Months Ended | 12 Months Ended |  | 12 Months Ended |  |  |  | 12 Months Ended |  | 12 Months Ended |
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Dec. 31, 2013 oz | Dec. 31, 2013 oz | Dec. 31, 2012 | Dec. 31, 2011 | Jan. 21, 2009 | Dec. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2013 Debt Instrument, Redemption Period, End of 2015 [Member] | Dec. 31, 2013 Debt Instrument, Redemption Period, After 2016 [Member] | Dec. 31, 2013 3.25% Convertible Senior Notes due March 2028 [Member] | Dec. 31, 2012 3.25% Convertible Senior Notes due March 2028 [Member] | Dec. 31, 2011 3.25% Convertible Senior Notes due March 2028 [Member] | Feb. 12, 2013 3.25% Convertible Senior Notes due March 2028 [Member] | Dec. 31, 2013 Senior Notes due Two Thousand Twenty One [Member] | Dec. 31, 2012 Senior Notes due Two Thousand Twenty One [Member] | Dec. 31, 2011 Senior Notes due Two Thousand Twenty One [Member] | Jan. 29, 2013 Senior Notes due Two Thousand Twenty One [Member] | Dec. 31, 2013 Banco Bisa Line of Credit [Member] | Dec. 31, 2013 Banco de Credito Line of Credit [Member] | Aug. 16, 2012 Kensington Term Facility [Member] | Mar. 31, 2012 Kensington Term Facility [Member] | Dec. 31, 2013 Kensington Term Facility [Member] | Dec. 31, 2012 Kensington Term Facility [Member] | Dec. 31, 2011 Kensington Term Facility [Member] | Dec. 31, 2011 Kensington Term Facility [Member] | Dec. 31, 2012 Kensington Term Facility [Member] Call Option [Member] oz | Dec. 31, 2013 Kensington Term Facility [Member] Put Option [Member] oz | Dec. 31, 2013 Palmarejo gold production royalty [Member] | Dec. 31, 2013 Minimum [Member] Rate | Mar. 31, 2012 Minimum [Member] | Dec. 31, 2013 Minimum [Member] Debt Instrument Redemption Period, Quarter ended September 30, 2014 [Member] Rate | Dec. 31, 2013 Minimum [Member] Rate | Dec. 31, 2013 Minimum [Member] Rate | Dec. 31, 2013 Minimum [Member] Debt Instrument, Redemption Period, End of 2015 [Member] Rate | Dec. 31, 2013 Minimum [Member] Debt Instrument, Redemption Period, After 2016 [Member] Rate | Dec. 31, 2013 Maximum [Member] Rate | Dec. 31, 2013 Maximum [Member] Debt Instrument Redemption Period, Quarter ended September 30, 2014 [Member] Rate | Dec. 31, 2013 Maximum [Member] Rate | Dec. 31, 2013 Maximum [Member] Rate | Dec. 31, 2013 Maximum [Member] Debt Instrument, Redemption Period, End of 2015 [Member] Rate | Dec. 31, 2013 Maximum [Member] Debt Instrument, Redemption Period, After 2016 [Member] Rate | Dec. 31, 2013 LIBOR [Member] | Dec. 31, 2013 LIBOR [Member] Maximum [Member] | Dec. 31, 2013 Alternate Base Rate [Member] Minimum [Member] | Dec. 31, 2013 Alternate Base Rate [Member] Maximum [Member] | Dec. 31, 2013 Palmarejo gold production royalty [Member] oz | Dec. 31, 2012 Palmarejo gold production royalty [Member] | Dec. 31, 2013 Palmarejo gold production royalty [Member] Maximum [Member] oz
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ore on leach pads | $ 50,495,000 | $ 50,495,000 | $ 22,991,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Future lease payments, 2014 | 8,200,000 | 8,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Future lease payments, 2015 | 5,100,000 | 5,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Future lease payments, 2016 | 1,600,000 | 1,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Future lease payments, 2017 | 800,000 | 800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Future lease payments, 2018 | 800,000 | 800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Future lease payments, Thereafter | 3,300,000 | 3,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  |  |  |  |  |  |  |  | 3.25% | 3.25% |  |  | 7.875% |  |  | 7.875% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of bank loan |  |  |  |  |  |  |  |  |  | 5,300,000 |  |  |  |  |  |  | 300,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and capital leases | 2,505,000 | 2,505,000 | 55,983,000 |  |  |  |  |  |  | 0 | 48,081,000 |  | 48,700,000 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Repurchased Face Amount |  |  |  |  |  |  |  |  |  | 43,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value of the equity component |  |  |  |  |  |  |  |  |  | 10,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest Expense, Debt |  |  |  |  |  |  |  |  |  | 466,000 | 1,581,000 | 1,581,000 |  | 21,853,000 | 0 | 0 |  |  |  |  |  | 0 | 2,339,000 |  | 4,383,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accretion of debt discount |  | 576,000 | 2,536,000 | 2,324,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective interest rate on the notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowing under term facility | 100,000,000 | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7.0 | 4.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, increase, additional borrowings |  | 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, commitment fee amount | 612,000 |  | 213,000 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of variable rate basis |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.0225 |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.00% | 1.25% | 3.00% |  |  |
Ratio of consolidated debt to adjusted EBITDA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.00 |  |  |  |  | 1.00 |  | 3.25 |  |  |  | 4.75 |  |  |  |  |  |  |  |
Ratio of adjusted EBITDA to interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.00 |  | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 3.00 | 2.75 | 1.50 | 2.00 | 2.75 | 3.00 |  |  |  |  |  |  |
Line of Credit Facility, Limit on Losses |  | 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum tangible net worth required for credit facility | 900,000,000 | 900,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Minimum Adjusted EBITDA |  | 100,000,000 |  |  |  | 50,000,000 | 75,000,000 | 100,000,000 | 110,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ratio of Secured Indebtedness to EBITDA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.00 |  |  |  |  |  |  | 1.25 |  |  |  |  |  |  |  |  |  |  |  |
Minimum Cash Balance Tested Quarterly |  | 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ratio of Consolidated Debt to Adjusted EBITDA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.00 |  |  |  |  |  |  | 3.00 |  |  |  |  |  |  |  |  |  |  |  |
Percentage of tangible net worth |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 85.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of net income | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Interest Rate at Period End |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.75% | 2.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Amount Outstanding | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of Long-term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 68,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on debt extinguishments |  | 0 | 1,036,000 | 5,526,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gold under collars protection |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 243,750 | 122,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average call feature of each collar |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,968 | 1,968 | 97,000 |  |  |  | 17.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average put feature of each collar |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 968 | 968 |  |  | 1,150 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 57,000,000 | 74,700,000 |
Sale Portion Life of Mine |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty Guarantees, Commitments, Ounces of Gold |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 400,000
Royalty agreement minimum obligation for the period | 400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty Agreement Minimum Obligation for Per Month | 4,167 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty Agreement Period |  |  |  |  | 8 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Actual Gold Production |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of Royalty on Ounces of Gold | 259,069 | 259,069 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Further Payment Made on Number of Additional Ounces of Gold |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 140,931 |  |
Payments to Acquire Royalty Interests in Mining Properties |  | 57,034,000 | 74,734,000 | 73,191,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional Long term debt and capital lease obligations(Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Implicit Interest Rate |  | 30.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accretion of Royalty Obligation |  | 17,641,000 | 19,139,000 | 22,230,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining Minimum Obligation Under Royalty Agreements | 51,200,000 | 51,200,000 | 61,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expensed Interest |  | 41,303,000 | 26,169,000 | 34,774,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized interest |  | $ (2,694,000) | $ (2,663,000) | $ (2,175,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

X
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- Definition Accretion Of Royalty Obligation. + References No definition available. + Details
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- Details
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- Definition Further payment made on number of additional Ounces of Gold. + References No definition available. + Details
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- Definition Gold under collars protection. + References No definition available. + Details
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- Definition Implicit interest rate. + References No definition available. + Details
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- Definition Line of Credit Facility, Limit on Losses + References No definition available. + Details
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- Definition Line of Credit Facility, Minimum Adjusted Earnings Before Income Taxes, Depreciation and Amortization + References No definition available. + Details
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- Definition Line of Credit Facility, Minimum Cash Balance Tested + References No definition available. + Details
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- Details
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- Definition Ore on leach pad current. + References No definition available. + Details
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- Definition Payment of royalty on ounces of gold. + References No definition available. + Details
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- Definition Quantity of gold on which monthly minimum obligation to be paid. + References No definition available. + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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