Information Related to Recurring Fair Value Measurement of Derivative Instruments (Detail) (Fair Value, Inputs, Level 2, USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Currency Related Swap | Noncurrent Liabilities
Derivative Liability Fair Value Net
Net Asset/(Liabilities)	$ (13,045)
Foreign Currency Derivatives
Derivative Asset Fair Value Net
Asset Derivatives, Fair Value, Total	3,013
Derivative Liability Fair Value Net
Net Asset/(Liabilities)	2,560
Foreign Currency Derivatives | Noncurrent Assets
Derivative Asset Fair Value Net
Asset Derivatives, Fair Value, Total	2,865
Not a hedge | Currency Related Swap
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(13,045)
Not a hedge | Currency Related Swap | Noncurrent Liabilities
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(10,610)
Not a hedge | Currency Related Swap | Current Liabilities
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(2,435)
Not a hedge | Foreign Currency Derivatives
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(453)
Not a hedge | Foreign Currency Derivatives | Current Liabilities
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(453)
Net Asset/(Liabilities)	(451)
Not a hedge | Foreign Currency Derivatives | Current Assets
Derivative Asset Fair Value Net
Asset Derivatives, Fair Value, Total	2
Derivative Liability Fair Value Net
Net Asset/(Liabilities)	146
Not a hedge | Foreign Currency Derivatives | Noncurrent Assets
Derivative Liability Fair Value Net
Net Asset/(Liabilities)	2,865
Designated as Hedging Instrument | Foreign Currency Derivatives | Current Assets
Derivative Asset Fair Value Net
Asset Derivatives, Fair Value, Total	146
Designated as Hedging Instrument | Interest Rate Swap | Current Liabilities
Derivative Liability Fair Value Net
Liability Derivatives, Fair value	(185)
Net Asset/(Liabilities)	$ (185)