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Financial Instruments - Fair Value and Notional Principal Amounts of Outstanding or Unsettled Derivative Instruments (Detail) (Foreign exchange-forward contracts (current) [Member], Not designated as hedging instruments [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2013 Prepaid expenses and other current assets [Member]	Dec. 31, 2012 Accrued and other current liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset
Liability	1	64
U.S. Dollar Notional	$ 23,042	$ 2,710

Fair value of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be offset against an obligation to return collateral under a master netting arrangement.

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- Definition

Fair value of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be offset against a right to receive collateral under a master netting arrangement.

+ References+ Details