Income Taxes - Additional Information (Detail) - USD ($)	6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014
Income Tax [Line Items]
Effective income tax rate	32.00%	32.30%
Minimum [Member]
Income Tax [Line Items]
Decrease in unrecognized tax benefits	$ 0
Increase in unrecognized tax benefits	0
Maximum [Member]
Income Tax [Line Items]
Decrease in unrecognized tax benefits	900,000
Increase in unrecognized tax benefits	$ 400,000