Financial Instruments - Derivative Instruments Designated as Cash Flow and Net Investment Hedging Instruments (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)	$ (4,943)	$ 8,650
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	1,419	(7,623)
Cross Currency Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)	1,975	1,206
Cross Currency Swap [Member] | Other expense, net [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(2,787)	(2,467)
Forward Currency Contracts [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)	(6,523)	7,179
Forward Currency Contracts [Member] | Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)	(395)	265
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)
Forward Currency Contracts [Member] | Other expense, net [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	$ 4,206	$ (5,156)