Fair Value of Financial Instruments - Foreign Currency Exchange Contracts Measured at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring, Foreign Exchange Contract, USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign currency derivative instruments—asset position	$ 516	$ 557
Foreign currency derivative instruments—liability position	(2,130)	(823)
Foreign Currency Derivatives at Fair Value, Net, Total	(1,614)	(266)
Observable market based inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign currency derivative instruments—asset position	516	557
Foreign currency derivative instruments—liability position	(2,130)	(823)
Foreign Currency Derivatives at Fair Value, Net, Total	$ (1,614)	$ (266)