Information Related to Recurring Fair Value Measurement of Derivative Instruments in Our Consolidated Condensed Balance Sheet (Detail) $ in Thousands	Jun. 30, 2015 USD ($)
Foreign Currency Derivatives | Not a hedge
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value, Total	$ 7,289
Fair Value, Inputs, Level 2 | Currency Related Swap
Derivatives Fair Value [Line Items]
Net Asset/(Liabilities)	(13,962)
Fair Value, Inputs, Level 2 | Currency Related Swap | Not a hedge
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair value	(13,962)
Fair Value, Inputs, Level 2 | Currency Related Swap | Not a hedge | Current Liabilities
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair value	(4,463)
Fair Value, Inputs, Level 2 | Currency Related Swap | Not a hedge | Non-current Liabilities
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair value	(9,499)
Fair Value, Inputs, Level 2 | Foreign Currency Derivatives | Designated as Hedging Instrument | Current Liabilities
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair value	(785)
Fair Value, Inputs, Level 2 | Foreign Currency Derivatives | Not a hedge
Derivatives Fair Value [Line Items]
Net Asset/(Liabilities)	6,504
Liability Derivatives, Fair value	(785)
Fair Value, Inputs, Level 2 | Foreign Currency Derivatives | Not a hedge | Non-current Assets
Derivatives Fair Value [Line Items]
Net Asset/(Liabilities)	5,094
Asset Derivatives, Fair Value, Total	5,094
Fair Value, Inputs, Level 2 | Commodity derivatives | Designated as Hedging Instrument | Current Liabilities
Derivatives Fair Value [Line Items]
Net Asset/(Liabilities)	(48)
Liability Derivatives, Fair value	(48)
Fair Value, Inputs, Level 2 | Contract One | Foreign Currency Derivatives | Designated as Hedging Instrument | Current Liabilities
Derivatives Fair Value [Line Items]
Net Asset/(Liabilities)	(785)
Fair Value, Inputs, Level 2 | Contract Two | Foreign Currency Derivatives | Not a hedge | Current Assets
Derivatives Fair Value [Line Items]
Net Asset/(Liabilities)	2,195
Asset Derivatives, Fair Value, Total	$ 2,195