Guarantees - Changes in Accrued Warranty (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013		Sep. 29, 2012
Product Warranties Disclosures [Abstract]
Balance at beginning of period	$ 5,811	$ 6,134	$ 4,692	[1]	$ 6,801
Warranty expense accruals	697	1,006	2,865		3,819
Warranty payments	(1,402)	(1,540)	(4,268)		(5,020)
Warranty liability assumed			1,817
Balance at end of period	$ 5,106	$ 5,600	$ 5,106		$ 5,600

[1] Derived from December 29, 2012 audited financial statements