Schedule II Valuation and Qualifying Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Allowance for doubtful accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 463	$ 556	$ 1,013
Additions Not Charged to Expense	1	(2)	(22)
Additions (Reductions) Charged (Credited) to Expense	(57)	(25)	(429)
Deductions/ Write-offs	99	66	6
Balance at End of Year	308	463	556
Reserve for excess and obsolete inventories [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	25,575	23,783	25,680
Additions Not Charged to Expense	611	88	167
Additions (Reductions) Charged (Credited) to Expense	8,884	5,796	1,743
Deductions/ Write-offs	7,008	4,092	3,807
Balance at End of Year	$ 28,062	$ 25,575	$ 23,783