Guarantees - Changes in Accrued Warranty (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014		Jun. 29, 2013
Product Warranties Disclosures [Abstract]
Balance at beginning of period	$ 4,816	$ 5,255	$ 5,155	[1]	$ 4,602
Warranty expense accruals	1,137	1,921	2,327		2,166
Warranty payments	(1,371)	(1,457)	(2,900)		(2,866)
Warranty liability assumed					1,817
Balance at end of period	$ 4,582	$ 5,719	$ 4,582		$ 5,719

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