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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Finished goods	$ 39,988	$ 30,703
Work in process	60,227	57,737
Raw materials	16,424	24,505
Supplies	32	40
Inventory, Net	$ 116,671	$ 112,985

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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