Property, Plant and Equipment - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 20,200,000	$ 18,100,000	$ 17,300,000
Impairment of long-lived assets	$ 149,000	$ 666,000	$ 300,000