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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details 2) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Derivative instruments, gain or (loss)    
Foreign Exchange Contract, Amount of Gain or (Loss) Recognized in Income on Derivative, not designated as hedging instruments $ (2,598) $ 7,116
Foreign Exchange Contracts
   
Derivative instruments, gain or (loss)    
Foreign Exchange Contract, Amount of Gain or (Loss) Recognized in Income on Derivative, not designated as hedging instruments $ (2,598) $ 7,116