Fair Value and Presentation in Consolidated Balance Sheets for Derivatives non of which are Designated as Accounting Hedges (Detail) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Asset Derivatives, Fair Value	[1]	$ 56	$ 232
Liability Derivatives, Fair Value	[1]	955	562
Foreign Exchange Contracts | Accrued Liabilities | Not Designated as Hedging Instrument
Derivative [Line Items]
Liability Derivatives, Fair Value		955	562
Foreign Exchange Contracts | Other Current Assets | Not Designated as Hedging Instrument
Derivative [Line Items]
Asset Derivatives, Fair Value		$ 56	$ 232

[1] Based on observable market transactions of spot and forward rates.