Accumulated Other Comprehensive Income (Loss) into Income Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 29, 2014		Jun. 30, 2013		Jun. 29, 2014		Jun. 30, 2013
Accumulated Other Comprehensive Income Loss [Line Items]
Cost of goods sold	$ (224,017)		$ (210,569)		$ (441,404)		$ (421,926)
Income from continuing operations before taxes	58,836		49,483		102,639		84,851
Tax expense (benefit)	10,006		6,082		18,540		13,749
Net of tax	48,830		43,401		84,099		71,102
Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income Loss [Line Items]
Total reclassifications, net of tax	668		854		1,408		2,034
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income Loss [Line Items]
Income from continuing operations before taxes	(52)		(194)		(129)		(696)
Tax expense (benefit)	5		95		39		322
Net of tax	(47)		(99)		(90)		(374)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges | Commodity Contract | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income Loss [Line Items]
Cost of goods sold	(52)		(194)		(129)		(696)
Pension and Other Postretirement Benefits Plans | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income Loss [Line Items]
Income from continuing operations before taxes	1,097		1,613		2,194		3,755
Tax expense (benefit)	(382)		(660)		(696)		(1,347)
Net of tax	715		953		1,498		2,408
Actuarial losses/(gains)	1,103	[1]	1,618	[1]	2,205	[1]	3,764	[1]
Prior-service costs	(6)	[1]	(6)	[1]	(11)	[1]	(11)	[1]
Transition obligation			$ 1	[1]			$ 2	[1]

[1] These accumulated other comprehensive income components are included in the computation of net benefit cost of pension and other postretirement benefit plans (see Note 12 for additional information).