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Income Taxes - Components of Income Tax Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income (loss) from continuing operations before taxes:
United States operations	$ 14,042us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	$ 31,678us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	$ (22,533)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Foreign operations	67,504us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	95,371us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	27,575us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Income from continuing operations before taxes	81,546us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	127,049us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5,042us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Currently payable
United States federal	6,701us-gaap_CurrentFederalTaxExpenseBenefit	(4,493)us-gaap_CurrentFederalTaxExpenseBenefit	(6,945)us-gaap_CurrentFederalTaxExpenseBenefit
United States state and local	1,617us-gaap_CurrentStateAndLocalTaxExpenseBenefit	(26)us-gaap_CurrentStateAndLocalTaxExpenseBenefit	(2,519)us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign	16,592us-gaap_CurrentForeignTaxExpenseBenefit	21,377us-gaap_CurrentForeignTaxExpenseBenefit	14,020us-gaap_CurrentForeignTaxExpenseBenefit
Income tax expense (benefit)	24,910us-gaap_CurrentIncomeTaxExpenseBenefit	16,858us-gaap_CurrentIncomeTaxExpenseBenefit	4,556us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred
United States federal	(9,662)us-gaap_DeferredFederalIncomeTaxExpenseBenefit	3,575us-gaap_DeferredFederalIncomeTaxExpenseBenefit	(22,660)us-gaap_DeferredFederalIncomeTaxExpenseBenefit
United States state and local	(746)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit	1,593us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit	(424)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Foreign	(7,388)us-gaap_DeferredForeignIncomeTaxExpenseBenefit	289us-gaap_DeferredForeignIncomeTaxExpenseBenefit	(19,666)us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Deferred Income tax expense (benefit)	(17,796)us-gaap_DeferredIncomeTaxExpenseBenefit	5,457us-gaap_DeferredIncomeTaxExpenseBenefit	(42,750)us-gaap_DeferredIncomeTaxExpenseBenefit
Total income tax expense (benefit)	$ 7,114us-gaap_IncomeTaxExpenseBenefit	$ 22,315us-gaap_IncomeTaxExpenseBenefit	$ (38,194)us-gaap_IncomeTaxExpenseBenefit

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