Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

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Income Taxes - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jul. 04, 2015
Jun. 28, 2014
Jul. 04, 2015
Jun. 28, 2014
Dec. 31, 2014
Income Tax Disclosure [Abstract]          
Penalties or interest liability accrued $ 0   $ 0   $ 0
Penalty or interest expense $ 0 $ 0      
Effective tax rate 34.60% 34.00% 34.50% 33.90%