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Amounts Recognized in Financial Statements with Respect to Plans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total cost of the Plans during the period	$ 1,618	$ 1,525
Amount of related income tax benefit recognized during the period	697	953
Net cost of the Plans during the period	$ 921	$ 572

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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