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Derivative Financial Instruments - Summary of Provisionally Priced Sales $ in Thousands | Dec. 31, 2017 USD ($) oz $ / oz
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Silver concentrate sales agreements | 2018 |
Derivative instruments Settlement |
Derivative, notional amount | $ | $ 383
Derivative average price | $ / oz | 16.61
Outstanding Provisionally Priced Sales Consists of Silver | oz | 23,065
Silver concentrate sales agreements | Thereafter |
Derivative instruments Settlement |
Derivative, notional amount | $ | $ 0
Derivative average price | $ / oz | 0.00
Outstanding Provisionally Priced Sales Consists of Silver | oz | 0
Gold concentrates sales agreements | 2018 |
Derivative instruments Settlement |
Derivative, notional amount | $ | $ 53,214
Derivative average price | $ / oz | 1,283.11
Outstanding Provisionally Priced Sales Consists of Gold | oz | 41,476
Gold concentrates sales agreements | Thereafter |
Derivative instruments Settlement |
Derivative, notional amount | $ | $ 0
Derivative average price | $ / oz | 0.00
Outstanding Provisionally Priced Sales Consists of Gold | oz | 0

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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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