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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Inventories on a FIFO basis [Abstract]
Raw materials	$ 8,807	$ 7,483
Work in process	12,124	12,996
Finished manufactured goods	24,378	18,850
Total inventories	$ 45,309	$ 39,329

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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