Reclassification of Amounts from Other Comprehensive Income Loss to Earnings (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of goods sold	$ (486,899)		$ (477,893)
Selling, administrative and general expenses	(64,655)		(64,912)
Benefit from income taxes	38,818		38,397
Net loss	(54,836)		(52,053)
Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net loss	4,286		4,022
Reclassification out of Accumulated Other Comprehensive Income | Reclassification Adjustment for Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest expense	1,415		1,555
Benefit from income taxes	(561)		(617)
Net loss	854		938
Reclassification out of Accumulated Other Comprehensive Income | Amortization of Pension and Postretirement Plan Actuarial Loss and Prior Service Cost
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of goods sold	4,457	[1]	3,935	[1]
Selling, administrative and general expenses	1,185	[1]	1,134	[1]
Benefit from income taxes	(2,210)	[1]	(1,985)	[1]
Net loss	$ 3,432	[1]	$ 3,084	[1]

[1] See Note 10 for a breakdown of the amortization cost between actuarial loss and prior service cost.