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Income Taxes - Reconciliation of Provision for Income Taxes at US Federal Statutory Rate to Provision in Statements of Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Provision at US federal statutory rate	$ 162,370	$ 205,419	$ 384,695
Foreign earnings taxed at different rates, including withholding taxes	(56,877)	(107,409)	(165,768)
Foreign losses without income tax benefit	5,843	20,140	3,215
State and local taxes, net of US federal benefit	482	3,760	4,854
Adjustments to previously accrued taxes	(19,134)	(55,026)	(32,200)
Tax restructuring	0	12,400	0
Other	1,815	8,752	388
Provision for income taxes	$ 94,499	$ 88,036	$ 195,184

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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-Name Accounting Standards Codification
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