Warranty Accrual Included in Other Accrued Liabilities (Detail) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013
Schedule of Accrued Liabilities [Line Items]
Balance at beginning of period	$ 9,073	$ 7,351	$ 6,660	$ 9,786
Accruals for warranties issued during the period	4,419	3,674	12,675	8,781
Adjustments related to pre-existing warranties	(559)	(524)	(1,000)	(2,323)
Settlements made during the period	(2,982)	(2,470)	(8,384)	(8,213)
Balance at end of period	$ 9,951	$ 8,031	$ 9,951	$ 8,031