Fair Value of Outstanding Derivative Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Derivative [Line Items]
Derivative assets		$ 216
Derivative liabilities	16	112
Derivatives not qualified as hedging instruments
Derivative [Line Items]
Derivative liabilities		112
Foreign exchange option contracts | Derivatives designated as cash flow hedging instruments
Derivative [Line Items]
Derivative assets		158
Foreign exchange forward contracts
Derivative [Line Items]
Derivative liabilities	16
Foreign exchange forward contracts | Derivatives designated as cash flow hedging instruments
Derivative [Line Items]
Derivative assets		$ 58