Commitments and Contingencies - Summary of Warranty Accrual Included in Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012
Commitments and Contingencies Disclosure [Abstract]
Balance at beginning of period	$ 3,228	$ 4,725	$ 4,292	$ 5,558
Transfer to Aurora as part of the sale of discontinued operations	0	0	(939)	0
Accrual for current period warranties	1,991	1,314	5,333	4,407
Warranty costs incurred	(1,705)	(1,677)	(5,172)	(5,603)
Balance at end of period	$ 3,514	$ 4,362	$ 3,514	$ 4,362