Derivative Instruments - Derivative Instruments Measured at Fair Value (Detail) (Forward Foreign Exchange Contracts [Member], Accrued and Other Current Liabilities [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2014
Derivatives, Fair Value [Line Items]
Derivative Fair Value	$ 419
Designated As Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Notional Amount	7,040
Derivative Fair Value	$ 419