Deferred Tax Assets Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Employee and retiree benefit plans	$ 27,361	$ 38,401
Depreciation and amortization	(175,894)	(170,630)
Inventories	9,627	10,851
Allowances and accruals	9,632	7,629
Interest rate exchange agreement	18,165	20,856
Other	4,636	7,059
Net deferred tax liabilities	$ (106,473)	$ (85,834)