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           Inventories - Summary of Inventories (Detail) (USD $) 
        In Thousands, unless otherwise specified  | 
        
           Sep. 28, 2013 
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           Dec. 31, 2012 
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|---|---|---|
| Inventory Disclosure [Abstract] | ||
| Finished Goods | $ 17,034 | $ 10,864 | 
| Work in Progress | 17,971 | 8,960 | 
| Raw Material | 32,250 | 28,800 | 
| Inventory, Net | $ 67,255 | $ 48,624 | 
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- Definition 
          Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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