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Derivative Financial Instruments (Details Textual) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 USD ($) oz $ / oz | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Jan. 21, 2009
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract] |  |  |  |
Gain (loss) on derivative instruments | $ 5,202,000 | $ 3,618,000 | $ 82,768,000 |
Remaining ounces under royalty obligation | oz | 33,495 |  |  |
Fair Value Assumptions, Risk Free Interest Rate | 19.90% | 11.80% |  |
Price per ounce under agreement | $ 412 |  |  |
Put Option [Member] |  |  |  |
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract] |  |  |  |
Contract expiration date | 3 years |  |  |
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 | $ 21,900,000 |  |
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net | 17,000,000 | 18,400,000 | 104,800,000 |
Realized losses | $ 13,900,000 | 20,400,000 | 28,600,000 |
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 | $ 300,000 | 100,000 | 2,000,000 |
Unrealized Gain (Loss) on Derivatives | 296,000 | (123,000) | (1,995,000) |
Gold Put Purchase and Call Sold Options Net [Member] |  |  |  |
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract] |  |  |  |
Derivative Liability, Fair Value |  | 1,039,000 |  |
Embedded Derivative Financial Instruments [Member] |  |  |  |
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract] |  |  |  |
Gain (loss) on derivative instruments | 3,101,000 | (2,001,000) | 76,200,000 |
Derivative Liability, Fair Value |  | 21,912,000 |  |
Silver and gold options [Member] |  |  |  |
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract] |  |  |  |
Gain (loss) on derivative instruments | 1,283,000 | 1,058,000 | 7,119,000 |
Mark-to-market gains and (losses) on forward foreign exchange contract | $ (1,300,000) | (600,000) | 0 |
Unrealized Gain (Loss) on Derivatives |  | 1,500,000 | $ 8,900,000 |
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 concentrate sales agreements [Member] |  |  |  |
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract] |  |  |  |
Derivative, Notional Amount | $ (8,849,000) |  |  |
Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract] |  |  |  |
Outstanding provisionally priced sales consists of silver | oz | 590,750 |  |  |
Derivative Average Price | $ / oz | 14.98 |  |  |
Derivative Instruments Settle in Year One [Member] | Gold concentrates sales agreements [Member] |  |  |  |
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract] |  |  |  |
Derivative, Notional Amount | $ (33,996,000) |  |  |
Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract] |  |  |  |
Outstanding provisionally priced sales consists of Gold | oz | 30,627 |  |  |
Derivative Average Price | $ / oz | 1,110 |  |  |
Derivative Instruments Settle Thereafter [Member] | Silver concentrate sales agreements [Member] |  |  |  |
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract] |  |  |  |
Derivative, Notional Amount | $ 0 |  |  |
Notional ounces | oz | 0 |  |  |
Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract] |  |  |  |
Derivative Average Price | $ / oz | 0 |  |  |
Derivative Instruments Settle Thereafter [Member] | Gold concentrates sales agreements [Member] |  |  |  |
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract] |  |  |  |
Derivative, Notional Amount | $ 0 |  |  |
Notional ounces | oz | 0 |  |  |
Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract] |  |  |  |
Derivative Average Price | $ / oz | 0 |  |  |
Prepaid Expenses and Other Current Assets [Member] |  |  |  |
Additional Derivative Financial Instruments and Fair Value of Financial Instruments (Textual) [Abstract] |  |  |  |
Fair value of the contract | $ 28,000 | 3,925,000 |  |
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 of the contract |  | $ 3,882,000 |  |

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