XML 24 R29.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Inventories (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2012
Inventory, Net [Abstract] |
Schedule of Inventories | Inventories consist of the following:
| March 31, 2012 | December 31, 2011
Raw materials | $ | 42,557 |  | $ | 41,142 |
Work-in-process | 15,932 |  | 15,548 |
Finished goods | 10,886 |  | 10,535 |
Operating and other supplies | 100,927 |  | 104,736 |
Inventories | $ | 170,302 |  | $ | 171,961 |

X
- Details
Name: | us-gaap_InventoryNetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 -Topic -SubTopic -Publisher SEC -Number 210 -Article 5 -Subparagraph a,b,c -Name Regulation S-X (SX) -Paragraph 6 -Section 2 + Details
Name: | us-gaap_ScheduleOfInventoryCurrentTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration