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Derivative Instruments and Hedging Activities (Details 2) (Foreign Exchange Contract [Member], Not Designated as Hedging Instrument [Member], Interest income and other, net [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Foreign Exchange Contract [Member] \| Not Designated as Hedging Instrument [Member] \| Interest income and other, net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	$ (1,175)	$ 3,074	$ 4,297

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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