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Financial Assets and Financial Liabilities Measured at Fair Value (Details 2) ((Level 2), Measured on a recurring basis, USD $)
In Thousands
Jun. 30, 2011
Dec. 31, 2010
Currency swaps
   
Fair values for derivatives    
Derivative asset (liability), net   $ (1,368)
Forward exchange contracts
   
Fair values for derivatives    
Derivative asset (liability), net $ 2 $ 13