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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	$ 255,299us-gaap_CurrentFederalTaxExpenseBenefit	$ 167,690us-gaap_CurrentFederalTaxExpenseBenefit	$ 169,833us-gaap_CurrentFederalTaxExpenseBenefit
State	20,438	12,942	15,366
Foreign	21,584us-gaap_CurrentForeignTaxExpenseBenefit	15,457us-gaap_CurrentForeignTaxExpenseBenefit	8,593us-gaap_CurrentForeignTaxExpenseBenefit
Deferred	(52,033)	(2,729)	(26,259)
Total provision for income taxes for continuing operations	$ 245,288us-gaap_IncomeTaxExpenseBenefit	$ 193,360us-gaap_IncomeTaxExpenseBenefit	$ 167,533us-gaap_IncomeTaxExpenseBenefit

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

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

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