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Inventories Stated at Lower of Average Cost or Market (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 28, 2014
Dec. 31, 2013
Inventory [Line Items]    
Raw materials $ 12,517 $ 13,005
Work-in-progress 8,596 8,196
Finished goods 1,500 1,561
Inventories $ 22,613 $ 22,762