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Inventories (Details) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2015
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Dec. 31, 2014
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|---|---|---|
| Inventory Disclosure [Abstract] | ||
| Finished goods | $ 10,064us-gaap_InventoryFinishedGoodsNetOfReserves | $ 12,393us-gaap_InventoryFinishedGoodsNetOfReserves |
| Raw materials and precious metals | 9,165uan_InventoryRawMaterialsAndPreciousMetalsNetOfReserves | 9,333uan_InventoryRawMaterialsAndPreciousMetalsNetOfReserves |
| Parts and supplies | 14,642us-gaap_InventoryPartsAndComponentsNetOfReserves | 13,888us-gaap_InventoryPartsAndComponentsNetOfReserves |
| Inventories | $ 33,871us-gaap_InventoryNet | $ 35,614us-gaap_InventoryNet |
| X | ||||||||||
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- Definition
Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process and precious metals. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date for elements of machinery or equipment held for the purpose of replacing similar parts in the course of repair or maintenance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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