Information Related to Recurring Fair Value Measurement of Derivative Instruments in Our Consolidated Condensed Balance Sheet (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Asset Derivatives, Fair Value, Total	$ 1,303
Fair Value, Inputs, Level 2 | Currency Related Swap
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Net Asset/(Liabilities)	(9,063)
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	1,158
Fair Value, Inputs, Level 2 | Designated as Hedging Instrument | Foreign Currency Derivatives | Current Liabilities
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Liability Derivatives, Fair value	412
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	9,063
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	2,532
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	6,531
Fair Value, Inputs, Level 2 | Not a hedge | Foreign Currency Derivatives
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Net Asset/(Liabilities)	891
Liability Derivatives, Fair value	412
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)	1,158
Fair Value, Inputs, Level 2 | Contract One | Designated as Hedging Instrument | Foreign Currency Derivatives | Current Liabilities
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Net Asset/(Liabilities)	(412)
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]
Net Asset/(Liabilities)	145
Asset Derivatives, Fair Value, Total	$ 145