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           Acquisitions - Summary of Sales and Amounts Included in Income from Operations of Subsidiary in Consolidated Financial Statements of Company (Detail) (USD $) 
        In Thousands, unless otherwise specified  | 
        3 Months Ended | 9 Months Ended | 3 Months Ended | ||
|---|---|---|---|---|---|
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           Sep. 28, 2013 
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           Sep. 29, 2012 
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           Sep. 28, 2013 
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           Sep. 29, 2012 
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           Sep. 28, 2013
 
          Peco, Inc [Member] 
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| Loans At Acquisition Date [Line Items] | |||||
| Sales | $ 89,681 | $ 68,899 | $ 234,481 | $ 199,026 | $ 15,698 | 
| Operating Income | $ 12,352 | $ 7,655 | $ 31,394 | $ 24,696 | $ 30 | 
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- Details 
          
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- Definition 
          The net result for the period of deducting operating expenses from operating revenues. No definition available. 
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- Definition 
          Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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