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Derivative Financial Instruments - Summary of Provisionally Priced Sales (Details) $ in Thousands | Jun. 30, 2019 USD ($) oz $ / oz
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Silver concentrate sales agreements | 2018 |
Derivative instruments Settlement |
Derivative, notional amount | $ (10,423)
Derivative average price | $ / oz | 15.22
Outstanding Provisionally Priced Sales Consists of Silver | oz | 685,006
Silver concentrate sales agreements | Thereafter |
Derivative instruments Settlement |
Derivative, notional amount | $ 0
Derivative average price | $ / oz | 0
Outstanding Provisionally Priced Sales Consists of Silver | oz | 0
Gold concentrates sales agreements | 2018 |
Derivative instruments Settlement |
Derivative, notional amount | $ (9,663)
Derivative average price | $ / oz | 1,302
Outstanding Provisionally Priced Sales Consists of Gold | oz | 7,424
Gold concentrates sales agreements | Thereafter |
Derivative instruments Settlement |
Derivative, notional amount | $ 0
Derivative average price | $ / oz | 0
Outstanding Provisionally Priced Sales Consists of Gold | oz | 0
Zinc concentrates sales agreements [Member] | 2018 |
Derivative instruments Settlement |
Derivative, notional amount | $ (16,448)
Derivative average price | $ / oz | 1.14
Outstanding Provisionally Priced Sales Consists of Gold | oz | 14,401,624
Zinc concentrates sales agreements [Member] | Thereafter |
Derivative instruments Settlement |
Derivative, notional amount | $ 0
Derivative average price | $ / oz | 0
Outstanding Provisionally Priced Sales Consists of Gold | oz | 0
Lead concentrates sales agreements [Member] | 2018 |
Derivative instruments Settlement |
Derivative, notional amount | $ (7,964)
Derivative average price | $ / oz | 0.89
Outstanding Provisionally Priced Sales Consists of Gold | oz | 8,996,543
Lead concentrates sales agreements [Member] | Thereafter |
Derivative instruments Settlement |
Derivative, notional amount | $ 0
Derivative average price | $ / oz | 0
Outstanding Provisionally Priced Sales Consists of Gold | oz | 0
Fixed Interest Rate Swap One |
Derivative instruments Settlement |
Derivative, notional amount | $ (50,000)
Fixed Interest Rate Swap Two |
Derivative instruments Settlement |
Derivative, notional amount | (75,000)
Fixed Interest Rate Swap Two | 2018 |
Derivative instruments Settlement |
Derivative, notional amount | (75,000)
Fixed interest rate swap payable | $ 967
Fixed Interest rate | 2.51%
Fixed Interest Rate Swap Two | Thereafter |
Derivative instruments Settlement |
Derivative, notional amount | $ 0
Fixed interest rate swap payable | $ 0
Fixed Interest rate | 0.00%
Variable Interest Rate Swap Two | 2018 |
Derivative instruments Settlement |
Derivative, notional amount | $ (75,000)
Variable interest rate swap receivable | $ 787
Average variable interest rate | 2.49%
Variable Interest Rate Swap Two | Thereafter |
Derivative instruments Settlement |
Derivative, notional amount | $ 0
Variable interest rate swap receivable | $ 0
Average variable interest rate | 0.00%

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