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Inventories Stated at Lower of Average Cost or Market (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2013	Dec. 31, 2012
Inventory [Line Items]
Raw materials	$ 15,778	$ 14,921
Work-in-progress	8,327	5,526
Finished goods	1,689	5,746
Inventories	$ 25,794	$ 26,193

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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