Income Taxes - Components of Net Deferred Taxes (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred tax assets
Deferred tax assets	$ 59,017us-gaap_DeferredTaxAssetsGross	$ 90,621us-gaap_DeferredTaxAssetsGross
Less: valuation allowance	(6,907)	(16,847)
Net deferred tax assets	52,110us-gaap_DeferredTaxAssetsNet	73,774us-gaap_DeferredTaxAssetsNet
Deferred tax liabilities
Deferred tax liabilities	(172,525)us-gaap_DeferredIncomeTaxLiabilities	(284,561)us-gaap_DeferredIncomeTaxLiabilities
Net deferred tax liabilities	(120,415)us-gaap_DeferredTaxAssetsLiabilitiesNet	(210,787)us-gaap_DeferredTaxAssetsLiabilitiesNet
United States [Member]
Deferred tax assets
Deferred pension plan amounts	23,497	8,859
Accrued expenses not currently deductible	14,250	31,769
Other	11,267	14,542
Deferred tax liabilities
Excess of net book basis over remaining tax basis	(166,959)	(275,073)
Other	(4,969)	(6,002)
Foreign Tax Authority [Member]
Deferred tax assets
Net operating loss carry forwards	6,907	33,021
Deferred pension plan amounts	3,096	2,130
Other		300
Deferred tax liabilities
Excess of net book basis over remaining tax basis	(200)	(1,034)
Other	$ (397)	$ (2,452)

Amount of deferred tax liability attributable to taxable temporary differences.

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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 foreign operating loss carryforwards.

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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 accrued liabilities.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of deferred tax liability attributable to taxable temporary differences from the entity's basis in a discontinued operation.

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