Information Related to Recurring Fair Value Measurement of Derivative Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013
Derivative Asset Fair Value Net
Asset Derivatives, Fair Value, Total	$ 2,695
Fair Value, Inputs, Level 2 | Foreign Currency Derivatives
Derivative Liability Fair Value Net
Net Asset/(Liabilities)	2,638
Fair Value, Inputs, Level 2 | Foreign Currency Derivatives | Noncurrent Assets
Derivative Asset Fair Value Net
Asset Derivatives, Fair Value, Total	2,403
Fair Value, Inputs, Level 2 | Currency Related Swap | Noncurrent Liabilities
Derivative Liability Fair Value Net
Net Asset/(Liabilities)	(12,029)
Fair Value, Inputs, Level 2 | Not a hedge | Foreign Currency Derivatives
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(57)
Fair Value, Inputs, Level 2 | Not a hedge | Foreign Currency Derivatives | Current Assets
Derivative Liability Fair Value Net
Net Asset/(Liabilities)	289
Fair Value, Inputs, Level 2 | Not a hedge | Foreign Currency Derivatives | Noncurrent Assets
Derivative Liability Fair Value Net
Net Asset/(Liabilities)	2,403
Fair Value, Inputs, Level 2 | Not a hedge | Foreign Currency Derivatives | Current Liabilities
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(57)
Net Asset/(Liabilities)	(54)
Fair Value, Inputs, Level 2 | Not a hedge | Currency Related Swap
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(12,029)
Fair Value, Inputs, Level 2 | Not a hedge | Currency Related Swap | Current Liabilities
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(2,476)
Fair Value, Inputs, Level 2 | Not a hedge | Currency Related Swap | Noncurrent Liabilities
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(9,553)
Fair Value, Inputs, Level 2 | Designated as Hedging Instrument | Interest Rate Swap | Current Liabilities
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(119)
Net Asset/(Liabilities)	(119)
Fair Value, Inputs, Level 2 | Contract One | Not a hedge | Foreign Currency Derivatives | Current Assets
Derivative Asset Fair Value Net
Asset Derivatives, Fair Value, Total	3
Fair Value, Inputs, Level 2 | Contract Two | Not a hedge | Foreign Currency Derivatives | Current Assets
Derivative Asset Fair Value Net
Asset Derivatives, Fair Value, Total	$ 289