Warranty - Summary of Accrued Warranty Obligation (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012
Product Warranties Disclosures [Abstract]
Balance at the beginning of the year	$ 4,252	$ 4,613
Warranty expense	3,615	3,279
Warranty payments	(3,564)	(3,612)
Balance at the end of the period	$ 4,303	$ 4,280