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INVENTORIES (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Inventory valuation reserves	$ 1,786	$ 1,729
Inventories
Raw materials	14,651	13,122
Work-in-process	8,666	10,188
Finished goods	19,135	17,273
Supplies	1,045	967
Total inventory	$ 43,497	$ 41,550

Amount of valuation reserve for inventory.

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- Definition

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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