Guarantees - Changes in Accrued Warranty (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013		Mar. 31, 2012
Product Warranties Disclosures [Abstract]
Balance at beginning of period	$ 4,692	[1]	$ 6,801
Warranty expense accruals	240		1,665
Warranty payments	(1,409)		(1,739)
Warranty liability assumed	1,817
Balance at end of period	$ 5,340		$ 6,727

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