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Inventories (Tables) | 9 Months Ended
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Sep. 30, 2013
Components of Inventories | The components of inventories are as follows:
|  | September 30, 2013 |  |  | December 31, 2012 |
(In thousands) |  |  |  |  |  |
Raw materials |  | $ | 134,709 |  |  | $ | 125,909 |
Work in process |  |  | 9,680 |  |  |  | 8,287 |
Finished goods |  |  | 78,533 |  |  |  | 78,788 |
Supplies and materials |  |  | 113,973 |  |  |  | 119,284 |
Inventories at FIFO or average cost |  |  | 336,895 |  |  |  | 332,268 |
Excess of FIFO or average cost over LIFO cost |  |  | (70,003 | ) |  |  | (63,501 | )
Inventories, net |  | $ | 266,892 |  |  | $ | 268,767 |

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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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