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Components of Income Tax Expense Attributable to Continuing Operations (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Taxes [Line Items]      
Current income tax expense, Federal $ 120,541us-gaap_CurrentFederalTaxExpenseBenefit $ 38,209us-gaap_CurrentFederalTaxExpenseBenefit $ 56,501us-gaap_CurrentFederalTaxExpenseBenefit
Current income tax expense, State 6,645us-gaap_CurrentStateAndLocalTaxExpenseBenefit (402)us-gaap_CurrentStateAndLocalTaxExpenseBenefit (24)us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Current income tax expense, Foreign 43,536us-gaap_CurrentForeignTaxExpenseBenefit 47,300us-gaap_CurrentForeignTaxExpenseBenefit 45,721us-gaap_CurrentForeignTaxExpenseBenefit
Current income tax expense 170,722us-gaap_CurrentIncomeTaxExpenseBenefit 85,107us-gaap_CurrentIncomeTaxExpenseBenefit 102,198us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred income tax (benefit) expense, Federal (47,390)us-gaap_DeferredFederalIncomeTaxExpenseBenefit 12,371us-gaap_DeferredFederalIncomeTaxExpenseBenefit (33,724)us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Deferred income tax (benefit) expense, State (2,419)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit 445us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit 578us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Deferred income tax (benefit) expense, Foreign (29,222)us-gaap_DeferredForeignIncomeTaxExpenseBenefit (13,588)us-gaap_DeferredForeignIncomeTaxExpenseBenefit (21,974)us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Deferred income tax (benefit) expense (79,031)us-gaap_DeferredIncomeTaxExpenseBenefit (772)us-gaap_DeferredIncomeTaxExpenseBenefit (55,120)us-gaap_DeferredIncomeTaxExpenseBenefit
Income tax expense $ 91,691us-gaap_IncomeTaxExpenseBenefit $ 84,335us-gaap_IncomeTaxExpenseBenefit $ 47,078us-gaap_IncomeTaxExpenseBenefit