Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Income Taxes [Line Items]
Effective tax rate	19.00%	23.60%	18.60%	25.80%
US R&D tax credit, amount			$ 400,000
US R&D tax credit reduction in tax rate, percentage			0.60%
Minimum [Member]
Income Taxes [Line Items]
Open tax years by major tax jurisdiction			2009
Maximum [Member]
Income Taxes [Line Items]
Open tax years by major tax jurisdiction			2011