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Derivative Instruments and Hedging Activities (Details 2) (Derivatives Not Designated as Hedging Instruments, USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Fair value of derivative instruments
Asset Derivatives	$ 72	$ 2,803
Liability Derivatives	4,172	435
Foreign exchange contracts \| Current assets
Fair value of derivative instruments
Asset Derivatives	72	2,803
Foreign exchange contracts \| Current liabilities
Fair value of derivative instruments
Liability Derivatives	$ 4,172	$ 435

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.

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- Definition

Fair value of derivative liability, 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