Net Gains (Losses) Recorded in Other Income and Consolidated Statements of Income (Expense), Net Relating to Foreign Exchange Contracts Not Designated as Hedges (Detail) (Derivatives Not Designated as Hedging Instruments, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivatives Not Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Gains/(Losses) recognized in other income, net	$ 3,836	$ (11,258)	$ (2,815)