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Inventories (Tables) | 9 Months Ended
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Sep. 30, 2013
Inventory, Net [Abstract] |
Schedule of Inventories |
Inventories consist of the following: | September 30, 2013 | December 31, 2012
Raw materials | $ | 68,091 |  | $ | 40,725 |
Work-in-process | 22,286 |  | 15,259 |
Finished goods | 12,834 |  | 9,753 |
Operating and other supplies | 128,294 |  | 94,188 |
Inventories (1) | $ | 231,505 |  | $ | 159,925 |
(1) | The balance at September 30, 2013 includes inventory maintained at the recently acquired Sebree smelter. See Note 2 Acquisition of Sebree aluminum smelter for additional information about the Sebree acquisition.

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- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 2 -Paragraph 6 -Subparagraph a,b,c -Article 5 + Details
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