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Warranty - Summary of Accrued Warranty Obligation (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Product Warranty [Line Items]
Balance at the beginning of the year	$ 4,252	$ 4,613
Warranty expense	1,837	1,068
Warranty payments	(1,707)	(1,792)
Balance at the end of the period	$ 4,382	$ 3,889

- 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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