Annual report pursuant to Section 13 and 15(d)

Acquisitions - Summary of Sales and Amounts Included in Income from Operations of Subsidiary in Consolidated Financial Statements of Company (Detail)

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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 12 Months Ended
Dec. 31, 2013
Sep. 28, 2013
Jun. 29, 2013
Mar. 30, 2013
Dec. 31, 2012
Sep. 29, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Business Acquisition [Line Items]                      
Sales $ 105,456 $ 89,681 $ 70,833 $ 73,967 $ 67,420 $ 68,899 $ 64,989 $ 65,138 $ 339,937 $ 266,446 $ 228,163
Operating Income                 42,305 32,625 30,821
Peco, Inc [Member]
                      
Business Acquisition [Line Items]                      
Sales                 36,452    
Operating Income                 $ 122