Information Related to Recurring Fair Value Measurement of Derivative Instruments in Our Consolidated Balance Sheet (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Asset Derivatives, Fair Value, Total	$ 2,036	$ 4,301
Fair Value, Inputs, Level 2 | Foreign Currency Derivatives | Noncurrent Assets
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Asset Derivatives, Fair Value, Total	1,969	4,141
Fair Value, Inputs, Level 2 | Currency Related Swap
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Net Asset/(Liabilities)	(11,829)	(15,876)
Fair Value, Inputs, Level 2 | Not a hedge | Foreign Currency Derivatives
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Liability Derivatives, Fair value		(471)
Net Asset/(Liabilities)	2,036	3,830
Fair Value, Inputs, Level 2 | Not a hedge | Foreign Currency Derivatives | Current Assets
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Net Asset/(Liabilities)		157
Fair Value, Inputs, Level 2 | Not a hedge | Foreign Currency Derivatives | Noncurrent Assets
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Net Asset/(Liabilities)	1,969	4,141
Fair Value, Inputs, Level 2 | Not a hedge | Foreign Currency Derivatives | Current Liabilities
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Liability Derivatives, Fair value		(471)
Net Asset/(Liabilities)		(468)
Fair Value, Inputs, Level 2 | Not a hedge | Currency Related Swap
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Liability Derivatives, Fair value	(11,829)	(15,876)
Fair Value, Inputs, Level 2 | Not a hedge | Currency Related Swap | Current Liabilities
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Liability Derivatives, Fair value	(2,471)	(2,631)
Fair Value, Inputs, Level 2 | Not a hedge | Currency Related Swap | Noncurrent Liabilities
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Liability Derivatives, Fair value	(9,358)	(13,245)
Fair Value, Inputs, Level 2 | Designated as Hedging Instrument | Interest Rate Swap | Current Liabilities
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Liability Derivatives, Fair value	(81)	(224)
Net Asset/(Liabilities)	(81)	(224)
Fair Value, Inputs, Level 2 | Contract One | Not a hedge | Foreign Currency Derivatives | Current Assets
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Asset Derivatives, Fair Value, Total	1	3
Net Asset/(Liabilities)	1
Fair Value, Inputs, Level 2 | Contract Two | Not a hedge | Foreign Currency Derivatives | Current Assets
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Asset Derivatives, Fair Value, Total	66	157
Net Asset/(Liabilities)	$ 66