Accumulated Other Comprehensive Income - Schedule of Amounts Reclassifications Out of Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Costs of products sold	$ (404,694)	$ (385,551)	$ (810,637)	$ (734,466)
Selling, general and administrative	(32,314)	(34,528)	(65,865)	(68,015)
Income tax provision	(1,287)	(1,105)	(4,397)	(5,945)
Reclassifications Out of Accumulated Other Comprehensive Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Net of tax	2,941	3,909	5,581	7,787
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Pension Plan Items [Member]
Defined Benefit Plan Disclosure [Line Items]
Before tax	3,935	5,959	7,609	12,022
Income tax provision	(1,491)	(2,234)	(2,884)	(4,518)
Net of tax	2,444	3,725	4,725	7,504
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Pension Plan Items [Member] | Prior Service Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Costs of products sold	695	613	1,243	1,226
Selling, general and administrative	226	161	412	322
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Pension Plan Items [Member] | Actuarial Losses [Member]
Defined Benefit Plan Disclosure [Line Items]
Costs of products sold	2,233	4,025	4,429	8,139
Selling, general and administrative	781	1,160	1,525	2,335
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Other Plan Items [Member]
Defined Benefit Plan Disclosure [Line Items]
Before tax	57	77	114	154
Income tax provision	(22)	(29)	(44)	(58)
Net of tax	35	48	70	96
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Other Plan Items [Member] | Prior Service Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Costs of products sold	(59)	(100)	(118)	(200)
Selling, general and administrative	(13)	(25)	(26)	(50)
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Other Plan Items [Member] | Actuarial Losses [Member]
Defined Benefit Plan Disclosure [Line Items]
Costs of products sold	106	155	212	310
Selling, general and administrative	23	47	46	94
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member] | (Gains) Losses on Cash Flow Hedges [Member]
Defined Benefit Plan Disclosure [Line Items]
Costs of products sold	641	188	1,090	258
Income tax provision	(179)	(52)	(304)	(71)
Net of tax	$ 462	$ 136	$ 786	$ 187