Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended			9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Mar. 31, 2012	Sep. 28, 2013	Sep. 29, 2012
Income Taxes [Line Items]
Effective tax rate	18.10%	31.00%		18.40%	27.50%
Effective tax rate for nondeductible asset impairment charge					2.00%
US R&D tax credit, amount		$ 715,000	$ 400,000
US R&D tax credit reduction in tax rate, percentage		1.50%
Minimum [Member]
Income Taxes [Line Items]
Open tax years by major tax jurisdiction				2010
Maximum [Member]
Income Taxes [Line Items]
Open tax years by major tax jurisdiction				2012