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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Inventories [Abstract]
Raw materials	$ 24,612	$ 27,006
Work in process	43,639	43,512
Finished goods	36,569	36,756
Total inventories	$ 104,820us-gaap_InventoryNet	$ 107,274us-gaap_InventoryNet

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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