Financial Instruments - Derivative Instruments Measured at Fair Value (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	$ 2,978	$ 10,146
Foreign currency contracts [Member]
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	2,689	9,476
Total Fair Value, Derivative Liabilities	9,554	8,933
Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	289	670
Fair Value of Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	1,035	1,250
Fair Value of Derivatives Designated as Hedging Instruments [Member] | Foreign currency contracts [Member]
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	746	580
Total Fair Value, Derivative Liabilities	5,515	6,024
Fair Value of Derivatives Designated as Hedging Instruments [Member] | Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	289	670
Fair Value of Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	1,943	8,896
Fair Value of Derivatives Not Designated as Hedging Instruments [Member] | Foreign currency contracts [Member]
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	1,943	8,896
Total Fair Value, Derivative Liabilities	4,039	2,909
Fair Value of Derivatives Not Designated as Hedging Instruments [Member] | Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	$ 0	$ 0