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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

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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

-Topic

-SubTopic

-Publisher SEC

-Number 210

-Article 5

-Subparagraph a,b,c

-Name Regulation S-X (SX)

-Paragraph 6

-Section 2

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