Discontinued Operations - Revenues and Components of Net Income Related to Discontinued Operations (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
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Add: Gain (loss) on disposal, net of taxes			$ 14,813	$ 0
Income (loss) from discontinued operations, net of taxes	91	(3,761)	15,619	1,338
HFC business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	161	16,291	9,717	38,147
Operating income	154	3,070	669	5,193
Less : provision for (benefit from) income taxes	57	6,831	(137)	3,855
Add: Gain (loss) on disposal, net of taxes	(6)	0	14,813	0
Income (loss) from discontinued operations, net of taxes	$ 91	$ (3,761)	$ 15,619	$ 1,338