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Debt (Details Textual) $ in Thousands |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 23, 2015 USD ($) | Mar. 31, 2015 | Sep. 30, 2015 USD ($) oz | Sep. 30, 2014 USD ($) | Sep. 30, 2015 USD ($) debt oz | Sep. 30, 2014 USD ($) | Dec. 31, 2014 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Cash payments on gold production royalty |  |  | $ (10,159) | $ (11,351) | $ (30,281) | $ (38,379) |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Number of lines of credits, outstanding | debt |  |  |  |  | 2 |  |
Debt |  |  | 11,775 |  | $ 11,775 |  | $ 17,498
Amortization of debt issuance costs |  |  | (104) | (107) | (313) | (252) |
Write off revolver costs, interest expense |  |  | 0 | 0 | 0 | 3,035 |
Line of credit facility, commitment fee amount |  |  | 0 | 0 | 0 | 179 |
Loss on termination of revolving credit facility |  |  | $ 0 | 0 | 0 | 3,035 |
Percentage of Actual Gold Production |  |  | 50.00% |  |  |  |
Additional Long term debt and capital lease obligations(Textual) [Abstract] |  |  |  |  |  |  |
Remaining Minimum Obligation Under Royalty Agreements |  |  | $ 20,300 |  | 20,300 |  | $ 34,000
Accretion of Royalty Obligation |  |  | 1,642 | 2,545 | 5,444 | 8,639 |
Capitalized interest |  |  | 926 | 423 | 2,670 | 942 |
Expensed Interest |  |  | $ 12,446 | $ 11,616 | $ 33,945 | $ 36,980 |
Convertible Senior Notes Due March 2028 [Member] |  |  |  |  |  |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Interest rate on notes |  |  | 3.25% |  | 3.25% |  | 3.25%
Debt Instrument, Face Amount |  |  |  |  |  |  | $ 0
Senior Notes due 2021 [Member] |  |  |  |  |  |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount |  |  | $ 2,000 |  | $ 2,000 |  |
Interest rate on notes |  |  | 7.875% |  | 7.875% |  | 7.875%
Debt |  |  | $ 432,900 |  | $ 432,900 |  |
Banco Bisa Line of Credit [Member] |  |  |  |  |  |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Borrowing under term facility |  |  | $ 12,000 |  | $ 12,000 |  |
Line of Credit Facility, Interest Rate at Period End |  |  | 6.00% |  | 6.00% |  |
Banco de Credito Line of Credit [Member] |  |  |  |  |  |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Borrowing under term facility |  |  | $ 15,000 |  | $ 15,000 |  |
Line of Credit Facility, Interest Rate at Period End |  |  | 6.00% |  | 6.00% |  |
Palmarejo gold production royalty [Member] |  |  |  |  |  |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Effective interest rate on the notes |  |  | 30.50% |  | 30.50% |  |
Palmarejo gold production royalty [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Commodity Royalty Payments | oz |  |  | 354,004 |  | 354,004 |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Remaining ounces under royalty obligation | oz |  |  | 45,996 |  | 45,996 |  |
Palmarejo gold production royalty [Member] | Maximum [Member] |  |  |  |  |  |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Payable ounces under royalty obligation | oz |  |  | 400,000 |  | 400,000 |  |
Convertible Senior Notes Due March 2028 [Member] |  |  |  |  |  |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Debt |  |  | $ 0 |  | $ 0 |  | $ 5,334
Debt Instrument, Repurchased Face Amount |  |  | 4,600 |  | 4,600 |  |
San Bartolome Letter of Credit Facility [Member] |  |  |  |  |  |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Line of Credit Facility, Fair Value of Amount Outstanding |  |  | 9,142 |  | 9,142 |  | 14,785
Short Term Credit Agreement [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unamortized debt issuance expense |  |  | 5,200 |  | 5,200 |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Short-term Debt |  |  | 50,000 |  | 50,000 |  |
Debt |  |  | 94,557 |  | 94,557 |  |
Term Loan due 2020 [Member] | Secured Debt [Member] |  |  |  |  |  |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Long-term Debt | $ 100,000 |  |  |  |  |  |
Prepayment premium for payments between first and second anniversary (as a percent) | 105.00% |  |  |  |  |  |
Prepayment premium for payments after second anniversary (as a percent) | 103.00% |  |  |  |  |  |
Amortization payments (as a percent) | 1.00% |  |  |  |  |  |
Debt Instrument, Term | 5 years |  |  |  |  |  |
Senior Notes due 2021 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount (Premium), Net |  |  | $ 6,400 |  | $ 6,400 |  | $ 7,300
Palmarejo [Member] |  |  |  |  |  |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Expected Royalty Duration |  |  |  |  | 1.0 |  |
Eurodollar [Member] | Short Term Credit Agreement [Member] |  |  |  |  |  |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  | 2.50% |  |  |  |  |
Eurodollar [Member] | Term Loan due 2020 [Member] | Secured Debt [Member] |  |  |  |  |  |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) | 1.00% |  |  |  |  |  |
Adjusted Eurodollar [Member] | Term Loan due 2020 [Member] | Secured Debt [Member] |  |  |  |  |  |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) | 8.00% |  |  |  |  |  |

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- Definition The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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