Accumulated Other Comprehensive Income (Loss) into Income Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014		Mar. 31, 2013
Accumulated Other Comprehensive Income Loss [Line Items]
Cost of goods sold	$ (217,387)		$ (211,357)
Income from continuing operations before taxes	43,803		35,368
Tax expense	(8,534)		(7,667)
Net of tax	35,269		27,701
Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income Loss [Line Items]
Total reclassifications, net of tax	740		1,180
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	(77)		(502)
Tax expense	34		227
Net of tax	(43)		(275)
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	(77)		(502)
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		2,140
Tax expense	(314)		(685)
Net of tax	783		1,455
Actuarial losses/(gains)	1,102	[1]	2,145	[1]
Prior-service costs	(5)	[1]	(6)	[1]
Transition obligation	$ 0	[1]	$ 1	[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).