Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Detail)

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Basis of Presentation (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jul. 04, 2015
Jun. 28, 2014
Jul. 04, 2015
Jun. 28, 2014
Jan. 14, 2015
Business Acquisition          
Research and development, design and related engineering $ 21,300,000 $ 20,600,000 $ 43,600,000 $ 37,900,000  
Derivative instruments outstanding $ 0   $ 0    
Armstrong Aerospace, Inc.          
Business Acquisition          
Date of acquisition     Jan. 14, 2015    
Percentage of acquired stock         100.00%