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Derivative Instruments and Hedging Activities (Details 2) (Foreign Exchange Derivative Instruments [Member], Derivatives Not Designated as Hedging Instruments [Member], Other, Net [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Foreign Exchange Derivative Instruments [Member] \| Derivatives Not Designated as Hedging Instruments [Member] \| Other, Net [Member]
Changes in fair value of foreign exchange contracts
Amount of Gain or (Loss) Recognized in Income on Derivatives	$ (484)	$ (772)	$ (4,932)

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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