v3.3.1.900

Inventories (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Inventory Disclosure [Abstract] |  |
Finished goods | $ 9,589 | $ 12,393
Raw materials and precious metals | 9,055 | 9,333
Parts and supplies | 18,885 | 13,888
Inventories | $ 37,529 | $ 35,614

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