Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Consolidated Results of Operation of Company with Acquired Business (Detail)

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Acquisitions - Consolidated Results of Operation of Company with Acquired Business (Detail) (Peco, Inc [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Sep. 28, 2013
Sep. 29, 2012
Peco, Inc [Member]
       
Loans At Acquisition Date [Line Items]        
Sales $ 93,517 $ 87,689 $ 280,714 $ 256,571
Net Income $ 7,278 $ 5,588 $ 23,209 $ 17,973
Basic Earnings Per Share $ 0.42 $ 0.33 $ 1.33 $ 1.05
Diluted Earnings Per Share $ 0.40 $ 0.31 $ 1.27 $ 0.99