Deferred Tax Assets Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Employee and retiree benefit plans	$ 38,871	$ 27,361
Depreciation and amortization	(172,766)	(175,894)
Inventories	11,229us-gaap_DeferredTaxAssetsInventory	9,627us-gaap_DeferredTaxAssetsInventory
Allowances and accruals	14,552	9,632
Interest rate exchange agreement	15,448	18,165
Other	4,626us-gaap_DeferredTaxAssetsOther	4,636us-gaap_DeferredTaxAssetsOther
Net deferred tax liabilities	$ (88,040)us-gaap_DeferredTaxAssetsLiabilitiesNet	$ (106,473)us-gaap_DeferredTaxAssetsLiabilitiesNet

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from derivative instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory.

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from postretirement benefits.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the allowance for doubtful accounts.

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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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