Operating Results Historically Included Segment (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]
Sales from discontinued operations		$ 9,618	$ 9,090	$ 38,342
Loss from discontinued operations before income taxes	(152)	(4,825)	(1,294)	(3,973)
Loss from discontinued operations, net of tax	(113)	(4,570)	(848)	(3,834)
Loss on disposal of discontinued operations, net of tax	$ (281)		$ (592)