Operating Results Historically Included Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales from discontinued operations.									$ 44,655	$ 61,984	$ 97,624
Income (loss) from discontinued operations before income taxes.									(5,041)	7,837	18,073
Income (loss) from discontinued operations, net of tax.	(1,317)	(4,570)	414	322	1,244	1,489	3,143	1,449	(5,151)	7,325	19,286
Gain on disposal of discontinued operations, net of tax.	$ 2,255								$ 2,255