Components of Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal	$ 51,399us-gaap_CurrentFederalTaxExpenseBenefit	$ 48,905us-gaap_CurrentFederalTaxExpenseBenefit	$ 57,106us-gaap_CurrentFederalTaxExpenseBenefit
State	4,487	5,954	8,449
Foreign	7,519us-gaap_CurrentForeignTaxExpenseBenefit	7,321us-gaap_CurrentForeignTaxExpenseBenefit	8,385us-gaap_CurrentForeignTaxExpenseBenefit
Current income tax provision	63,405us-gaap_CurrentIncomeTaxExpenseBenefit	62,180us-gaap_CurrentIncomeTaxExpenseBenefit	73,940us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	38,879	9,559	5,999
State	2,958	2,637	(610)
Foreign	(3,081)	(5,071)	(6,888)
Deferred income tax provision (benefit)	38,756us-gaap_DeferredIncomeTaxExpenseBenefit	7,125us-gaap_DeferredIncomeTaxExpenseBenefit	(1,499)us-gaap_DeferredIncomeTaxExpenseBenefit
Provision for income taxes	$ 102,161us-gaap_IncomeTaxExpenseBenefit	$ 69,305us-gaap_IncomeTaxExpenseBenefit	$ 72,441us-gaap_IncomeTaxExpenseBenefit

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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