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Derivative Financial Instruments and Hedging Activities (Details) (Foreign Exchange Forward [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Number of contracts held	3
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange forwards - Assets	$ 3,183	$ 3,537
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange forwards - Liability	$ 0	$ 31

Fair value of liability associated with derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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- Definition

Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References+ Details