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Derivative Instruments and Hedging Activities (Details 1) (Derivatives not designated as hedging instruments [Member], Equity contract [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Derivatives not designated as hedging instruments [Member] \| Equity contract [Member]
Summary of the effect of derivative instruments not designated as hedging instruments on income
Gains (losses) recognized in other loss (income), net	$ 333		$ 61

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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