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Acquisitions - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
9 Months Ended 0 Months Ended
Sep. 27, 2014
Sep. 28, 2013
May 13, 2013
Challenger Lifts Inc [Member]
May 28, 2014
Pro-Cut International, Inc [Member]
Business Acquisition [Line Items]        
Cash purchase price of acquisition $ 41.3 $ 38.2 $ 38.2 $ 41.3
Sales of acquired entity       $ 24