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INVENTORY (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
INVENTORY
Raw materials	$ 15,152	$ 15,526
Work-in-process	14,811	10,511
Finished goods	18,627	15,947
Supplies	1,371	1,234
Total inventory	$ 49,961	$ 43,218

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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