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Derivative Instruments And Hedging Activities (Tables)
9 Months Ended
Sep. 30, 2011
Derivative Instruments And Hedging Activities [Abstract] 
Summary Of The Effect Of Derivative Instruments On The Condensed Consolidated Statements Of Operations

Derivatives Not Designated

as Hedging Instruments

  

Location of Gain (Loss)

Recognized in Results

of Operations

   Amount of Gain (Loss)
Recognized in Results

of Operations
 
      Three months ended September 30,  
      2011     2010  

Foreign currency forward contracts

   Other income (expense), net    $ (1,119 )    $ 2,568   

Derivatives Not Designated

as Hedging Instruments

  

Location of Gain (Loss)

Recognized in Results

of Operations

   Amount of Gain (Loss)
Recognized in Results

of Operations
 
      Nine months ended September 30,  
      2011      2010  

Foreign currency forward contracts

   Other income (expense), net    $ 840       $ (2,498 )