Guarantees - Changes in Accrued Warranty (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014		Sep. 28, 2013
Product Warranties Disclosures [Abstract]
Balance at beginning of period	$ 4,582	$ 5,719	$ 5,155	[1]	$ 4,602
Warranty expense accruals	1,633	690	3,960		2,857
Warranty payments	(1,252)	(1,401)	(4,152)		(4,284)
Warranty liability assumed					1,833
Balance at end of period	$ 4,963	$ 5,008	$ 4,963		$ 5,008

[1] Derived from December 28, 2013 audited financial statements