Deferred Compensation Plan - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Deferred compensation plan invested amounts	$ 27,089,000	$ 20,082,000
Deferred compensation plan vested amounts due	26,984,000	19,927,000
Change in market value of trust assets	$ 2,158,000	$ (273,000)	$ 1,925,000
Maximum
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Percentage of compensation deferred	100.00%