Guarantees - Changes in Accrued Warranty (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013		Jun. 30, 2012
Product Warranties Disclosures [Abstract]
Balance at beginning of period	$ 5,340	$ 6,727	$ 4,692	[1]	$ 6,801
Warranty expense accruals	1,928	1,148	2,168		2,813
Warranty payments	(1,457)	(1,741)	(2,866)		(3,480)
Warranty liability assumed			1,817
Balance at end of period	$ 5,811	$ 6,134	$ 5,811		$ 6,134

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