Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

v2.4.0.8
Income Taxes - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Jun. 28, 2014
Jun. 29, 2013
Dec. 31, 2013
Income Tax [Line Items]          
Penalties or interest liability accrued $ 0   $ 0   $ 0
Penalty or interest expense 0 0      
Effective tax rate 34.00% 33.20% 33.90% 26.10%  
2012 R and D Tax Credits [Member] | Research And Development Tax Credit [Member]
         
Income Tax [Line Items]          
R&D tax credits   1.1   1.1  
2013 R and D Tax Credits [Member] | Research And Development Tax Credit [Member]
         
Income Tax [Line Items]          
R&D tax credits   $ 0.4   $ 0.4