Income Taxes - 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	$ 74,224us-gaap_CurrentFederalTaxExpenseBenefit	$ 173,930us-gaap_CurrentFederalTaxExpenseBenefit	$ 109,272us-gaap_CurrentFederalTaxExpenseBenefit
State	9,542	23,287	12,397
Foreign	39,978us-gaap_CurrentForeignTaxExpenseBenefit	37,193us-gaap_CurrentForeignTaxExpenseBenefit	14,657us-gaap_CurrentForeignTaxExpenseBenefit
Total current tax provision	123,744us-gaap_CurrentIncomeTaxExpenseBenefit	234,410us-gaap_CurrentIncomeTaxExpenseBenefit	136,326us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	20,799	(15,457)	16,134
State	3,698	(451)	1,627
Foreign	9,167	(562)	4,772
Total deferred tax provision (benefit)	33,664us-gaap_DeferredIncomeTaxExpenseBenefit	(16,470)us-gaap_DeferredIncomeTaxExpenseBenefit	22,533us-gaap_DeferredIncomeTaxExpenseBenefit
Total provision for income taxes from continuing operations	$ 157,408us-gaap_IncomeTaxExpenseBenefit	$ 217,940us-gaap_IncomeTaxExpenseBenefit	$ 158,859us-gaap_IncomeTaxExpenseBenefit

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

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