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Foreign Currency Derivative Instruments Foreign Currency Derivative Instruments (Datails 2) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Foreign Currency [Abstract]
Derivative Liability, Fair Value, Gross Liability	$ (901)	$ 394
Derivative Liability, Fair Value, Gross Asset	76	65
Derivative Liabilities	$ 977	$ (329)

Fair value, after the effects of master netting arrangements, of a 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. Includes assets not subject to a master netting arrangement and not elected to be offset.

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