Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets related to:
Expenses not yet deducted for tax purposes	$ 343,156	$ 362,265
Pension liability not yet deducted for tax purposes	227,880	405,048
Capital loss		16,803
Valuation allowance		(16,803)
Deferred tax assets, total	571,036	767,313
Deferred tax liabilities related to:
Employee and retiree benefits	188,235	205,268
Inventory	152,641	191,047
Other intangible assets	110,272	23,295
Property, plant, and equipment	53,751	41,130
Other	29,733	28,321
Deferred tax liabilities, total	534,632	489,061
Net deferred tax assets	36,404	278,252
Current portion of deferred tax (assets) liabilities	(22,165)	1,211
Noncurrent net deferred tax assets	$ 14,239	$ 279,463