Commitments and Contingencies - Summary of Warranty Accrual Included in Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 27, 2014	Jun. 28, 2013	Jun. 27, 2014	Jun. 28, 2013
Commitments and Contingencies Disclosure [Abstract]
Balance at beginning of period	$ 3,659	$ 3,270	$ 3,606	$ 4,292
Transfer to Aurora as part of the sale of discontinued operations	0	0		(939)
Accrual for current period warranties	1,606	1,948	3,355	3,342
Warranty costs incurred	(1,733)	(1,990)	(3,429)	(3,467)
Balance at end of period	$ 3,532	$ 3,228	$ 3,532	$ 3,228