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Guarantees - Changes in Accrued Warranty (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Product Warranty [Line Items]
Beginning balance	$ 6,801	$ 5,016	$ 3,747
Warranty accruals	4,214	10,987	6,071
Warranty payments	(6,323)	(9,202)	(4,802)
Ending balance	$ 4,692	$ 6,801	$ 5,016

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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