Amounts Recognized in Financial Statements with Respect to Plans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total cost of the Plans during the period	$ 1,374	$ 1,661	$ 2,992	$ 3,186
Amount of related income tax benefit recognized during the period	282	379	979	1,332
Net cost of the Plans during the period	$ 1,092	$ 1,282	$ 2,013	$ 1,854