Information Related to Recurring Fair Value Measurement of Derivative Instruments in Our Consolidated Balance Sheet (Detail) (Fair Value, Inputs, Level 2, USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Foreign Currency Derivatives | Not a hedge
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Asset Derivatives, Fair Value, Total	$ 1,490	$ 2,036
Net Asset/(Liabilities)	1,490	2,036
Foreign Currency Derivatives | Not a hedge | Current Assets
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Asset Derivatives, Fair Value, Total	145
Net Asset/(Liabilities)	145
Foreign Currency Derivatives | Not a hedge | Current Assets | Contract One
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Asset Derivatives, Fair Value, Total		1
Net Asset/(Liabilities)		1
Foreign Currency Derivatives | Not a hedge | Current Assets | Contract Two
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Asset Derivatives, Fair Value, Total		66
Net Asset/(Liabilities)		66
Foreign Currency Derivatives | Not a hedge | Noncurrent Assets
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Asset Derivatives, Fair Value, Total	1,345	1,969
Net Asset/(Liabilities)	1,345	1,969
Currency Related Swap
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Net Asset/(Liabilities)		(11,829)
Currency Related Swap | Not a hedge
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Liability Derivatives, Fair value	(9,164)	(11,829)
Net Asset/(Liabilities)	(9,164)
Currency Related Swap | Not a hedge | Current Liabilities
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Liability Derivatives, Fair value	(2,466)	(2,471)
Currency Related Swap | Not a hedge | Noncurrent Liabilities
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Liability Derivatives, Fair value	(6,698)	(9,358)
Interest Rate Swap | Designated as Hedging Instrument | Current Liabilities
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Liability Derivatives, Fair value		(81)
Net Asset/(Liabilities)		$ (81)