Information Related to Recurring Fair Value Measurement of Derivative Instruments (Detail) (Fair Value, Inputs, Level 2, USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Currency Related Swap | Noncurrent Liabilities
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Net Asset/(Liabilities)	$ (15,876)	$ (19,678)
Foreign Currency Derivatives
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Net Asset/(Liabilities)	3,830
Derivative Asset Fair Value Net
Asset Derivatives, Fair Value, Total	4,301
Foreign Currency Derivatives | Noncurrent Assets
Derivative Asset Fair Value Net
Asset Derivatives, Fair Value, Total	4,141
Not a hedge | Currency Related Swap
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(15,876)	(19,678)
Not a hedge | Currency Related Swap | Noncurrent Liabilities
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(13,245)	(17,189)
Not a hedge | Currency Related Swap | Current Liabilities
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(2,631)	(2,489)
Not a hedge | Foreign Currency Derivatives
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(471)
Not a hedge | Foreign Currency Derivatives | Current Liabilities
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Net Asset/(Liabilities)	(468)	413
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(471)	(2,262)
Not a hedge | Foreign Currency Derivatives | Current Assets
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Net Asset/(Liabilities)	157
Derivative Asset Fair Value Net
Asset Derivatives, Fair Value, Total	3	2,675
Not a hedge | Foreign Currency Derivatives | Noncurrent Assets
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Net Asset/(Liabilities)	4,141
Not a hedge | Commodity Derivatives | Current Liabilities
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Net Asset/(Liabilities)		(144)
Derivative Liability Fair Value Net
Liability Derivatives, Fair value		(144)
Designated as Hedging Instrument [Member] | Foreign Currency Derivatives | Current Assets
Derivative Asset Fair Value Net
Asset Derivatives, Fair Value, Total	157
Designated as Hedging Instrument [Member] | Interest Rate Swap | Current Liabilities
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Net Asset/(Liabilities)	(224)	(206)
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	$ (224)	$ (206)