Amounts Recognized in Financial Statements with Respect to Plans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total cost of the Plans during the period	$ 1,141	$ 1,427	$ 4,133	$ 4,613
Amount of related income tax benefit recognized during the period	315	669	1,294	2,001
Net cost of the Plans during the period	$ 826	$ 758	$ 2,839	$ 2,612