Discontinued Operations - Summary Results for Discontinued Operations in Consolidated Statement of Earnings (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net sales									$ 0	$ 13,945	$ 62,489
Loss from discontinued operations									(141)	(13,971)	(4,673)
Income tax benefit									218	1,299	1,837
Gain on sale of discontinued operations									930	68,745	0
Income tax expense on sale									0	(11,773)	0
Income (loss) from discontinued operations	$ 191	$ 516	$ 300	$ 0	$ 2,185	$ 10,814	$ (205)	$ 31,506	$ 1,007	$ 44,300	$ (2,836)