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Income Taxes - Components of Income Tax (Benefit) Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Foreign:
Current	$ 252,476us-gaap_CurrentForeignTaxExpenseBenefit	$ 195,154us-gaap_CurrentForeignTaxExpenseBenefit	$ 163,199us-gaap_CurrentForeignTaxExpenseBenefit
Deferred	(1,369)	(6,318)	17,848
Federal:
Current	(4,601)us-gaap_CurrentFederalTaxExpenseBenefit	(2,073)us-gaap_CurrentFederalTaxExpenseBenefit	12,379us-gaap_CurrentFederalTaxExpenseBenefit
Deferred	(1,866)	2,073	(12,660)
State:
Current	0	0	(3)
Total income tax expense	$ 244,640us-gaap_IncomeTaxExpenseBenefit	$ 188,836us-gaap_IncomeTaxExpenseBenefit	$ 180,763us-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.

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