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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Inventories [Abstract]
Finished goods	$ 45,748	$ 49,235
Work in process	45,958	44,866
Raw material and supplies	27,249	25,082
Total inventories	$ 118,955	$ 119,183

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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