Deferred Compensation Plan - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Jun. 28, 2013	Jun. 29, 2012	Dec. 28, 2012
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Deferred compensation plan invested amounts	$ 33,305,000		$ 33,305,000		$ 27,089,000
Deferred compensation plan vested amounts due	33,175,000		33,175,000		26,984,000
Change in market value of trust assets	$ 168,000	$ (555,000)	$ 2,234,000	$ 933,000
Maximum
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Percentage of compensation deferred				100.00%