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Accrued Warranties (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011
Product Warranty Liability [Line Items]
Beginning Balance	$ 2,365	$ 1,857
Provision for warranty expense	1,457	1,170
Warranty expired	(1,377)	(811)
Ending Balance	$ 2,445	$ 2,216

- Definition

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.

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