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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Inventories [Abstract]
Finished goods	$ 58,585	$ 61,540
Work in process	45,446	39,552
Raw material and supplies	24,942	28,711
Total inventories	$ 128,973	$ 129,803

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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