Derivative Instruments - Effect of Derivative Instruments on the Consolidated Results of Operations and Accumulated other Comprehensive Income (Detail) - Non-Designated Derivatives - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Derivative Instruments Gain Loss [Line Items]
Gains (Losses) Recognized in Income		$ 3,020	$ 3,927
Forward Currency Exchange Contracts
Derivative Instruments Gain Loss [Line Items]
Gains (Losses) Recognized in Income	[1]	$ 3,020	$ 3,927

[1] The gains (losses) on these derivatives substantially offset the (losses) gains on the economically hedged portion of the foreign intercompany balances.