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Inventories | 6 Months Ended
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Jun. 30, 2011
Notes to Financial Statements [Abstract] |
Inventories | Inventories consist of the following:
|  | June 30, 2011 |  |  | December 31, 2010 |
Raw materials |  | $ | 66,057 |  |  | $ | 49,098 |
Work-in-process |  |  | 16,564 |  |  |  | 13,979 |
Finished goods |  |  | 7,638 |  |  |  | 7,901 |
Operating and other supplies |  |  | 97,129 |  |  |  | 84,930 |
Inventories |  | $ | 187,388 |  |  | $ | 155,908 |
Inventories are stated at the lower of cost or market, using the first-in, first-out method (“FIFO”).

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- Definition This element represents the complete disclosure related to inventory. This may include, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the major classes of inventory, and the nature of the cost elements included in inventory. If inventory is stated above cost, accrued net losses on firm purchase commitments for inventory and losses resulting from valuing inventory at the lower-of-cost-or-market may also be included. For LIFO inventory, may disclose the amount and basis for determining the excess of replacement or current cost over stated LIFO value and the effects of a LIFO quantities liquidation that impacts net income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 3 -Section A -Paragraph 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 6 -Subparagraph a, b, c -Article 5 + Details
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