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Income Taxes - Additional Information (Detail) (USD $)
3 Months Ended 6 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Jun. 28, 2014
Jun. 29, 2013
Income Tax Disclosure [Abstract]        
Income tax interest and penalties accrued $ 0 $ 0 $ 0 $ 0
Unrealized tax benefit 4,000   4,000  
Effective tax rate 11.10% 19.00% 18.20% 18.60%
Discrete charge $ 2,550,000