Deferred Compensation Plan - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 28, 2012	Sep. 30, 2011	Sep. 28, 2012	Sep. 30, 2011	Dec. 30, 2011
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Deferred compensation plan invested amounts	$ 26,585,000		$ 26,585,000		$ 20,082,000
Deferred compensation plan vested amounts due	26,468,000		26,468,000		19,927,000
Change in market value of trust assets	$ 1,094,000	$ 2,511,000	$ 2,027,000	$ 1,656,000
Maximum
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Percentage of compensation deferred			100.00%