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Derivative Financial Instruments - Summary of Provisionally Priced Sales (Details) $ in Thousands | Sep. 30, 2019 USD ($) oz $ / oz
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Silver concentrate sales agreements | 2018 |
Derivative instruments Settlement |
Derivative, notional amount | $ (10,406)
Derivative average price | $ / oz | 17.53
Outstanding Provisionally Priced Sales Consists of Silver | oz | 593,523
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 | $ (23,032)
Derivative average price | $ / oz | 1,472
Outstanding Provisionally Priced Sales Consists of Gold | oz | 15,652
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 | $ (14,451)
Derivative average price | $ / oz | 1.07
Outstanding Provisionally Priced Sales Consists of Gold | oz | 13,512,379
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 | $ (7,650)
Derivative average price | $ / oz | 0.93
Outstanding Provisionally Priced Sales Consists of Gold | oz | 8,212,898
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 | (37,500)
Fixed interest rate swap payable | $ 240
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 | $ (37,500)
Variable interest rate swap receivable | $ 185
Average variable interest rate | 2.37%
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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