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Commitments and Contigencies (Details Textual) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 USD ($) t | Oct. 31, 2017 USD ($) | Oct. 02, 2014 USD ($)
Palmarejo gold production royalty |  |  |
Business Acquisition [Line Items] |  |  |
Production to be sold, percent | 50.00% |  | 50.00%
Price per ounce under agreement | $ 800 |  | $ 800
Aggregate deposit to be received | $ 20,000,000 |  | $ 22,000,000
JDS Silver Holdings Ltd. |  |  |
Business Acquisition [Line Items] |  |  |
Silvertip acquisition contingent consideration |  | $ 50,000,000 |
Long-term Purchase Commitment, Milestones | 2 |  |
JDS Silver Holdings Ltd. | First Milestone |  |  |
Business Acquisition [Line Items] |  |  |
Silvertip acquisition contingent consideration |  | 25,000,000 |
Sustained minim and milling per day (in tones) | t | 1,000 |  |
JDS Silver Holdings Ltd. | Second Milestone |  |  |
Business Acquisition [Line Items] |  |  |
Silvertip acquisition contingent consideration |  | 25,000,000.0 |
Maximum payment |  | $ 25,000,000 |
Tonnes of Resource Added | t | 3,700,000 |  |
Amount of resource required (in tonnes) | t | 300,000 |  |
Commitment amount per resource amount reached | $ 5,000,000 |  |
Minimum Resource Tonnes Milestone | t | 2,500,000 |  |

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- Definition Total achievable contingent consideration offered in connection with the acquisition of Coeur Silvertip Holdings Ltd payable upon achieving two milestones. Contingent consideration payable up to $50.0 million in total or $25.0 million per milestone + References No definition available. + Details
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