Schedule of Restructuring and Other Net (Detail) (USD $) In Thousands, unless otherwise specified		3 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended			12 Months Ended		3 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended			12 Months Ended
	Sep. 28, 2014	Mar. 30, 2014 Q3 2013 Activity	Dec. 31, 2013 Q3 2013 Activity	Sep. 28, 2014 Q3 2013 Activity	Jun. 29, 2014 Q3 2013 Activity	Mar. 30, 2014 Q4 2013 Activity	Dec. 31, 2013 Q4 2013 Activity	Sep. 28, 2014 Q2 2014 Activity	Jun. 29, 2014 Q2 2014 Activity	Sep. 28, 2014 Q3 2014 Activity	Dec. 31, 2013 Pre-2013 Activities	Sep. 28, 2014 Severance and Benefits	Mar. 30, 2014 Severance and Benefits Q3 2013 Activity	Dec. 31, 2013 Severance and Benefits Q3 2013 Activity	Sep. 28, 2014 Severance and Benefits Q3 2013 Activity	Jun. 29, 2014 Severance and Benefits Q3 2013 Activity	Mar. 30, 2014 Severance and Benefits Q4 2013 Activity	Dec. 31, 2013 Severance and Benefits Q4 2013 Activity	Sep. 28, 2014 Severance and Benefits Q2 2014 Activity	Jun. 29, 2014 Severance and Benefits Q2 2014 Activity	Sep. 28, 2014 Severance and Benefits Q3 2014 Activity	Dec. 31, 2013 Severance and Benefits Pre-2013 Activities	Dec. 31, 2013 Facility Exit Costs Pre-2013 Activities
Restructuring Cost and Reserve
Beginning Balance	$ 210	$ 371		$ 210	$ 210	$ 114		$ 42			$ 1,327	$ 210	$ 371		$ 210	$ 210	$ 114		$ 42			$ 243	$ 1,084
Provision			1,337				600		572	225				1,337				600		572	225
Change in estimate											(553)												(553)
Cash payments		(161)	(966)			(114)	(486)	(42)	(530)	(225)	(774)		(161)	(966)			(114)	(486)	(42)	(530)	(225)	(243)	(531)
Ending balance	$ 210	$ 210	$ 371	$ 210	$ 210		$ 114		$ 42		$ 0	$ 210	$ 210	$ 371	$ 210	$ 210		$ 114		$ 42		$ 0	$ 0