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Comprehensive Income (Details 1) (USD $)
In Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Other Comprehensive Income (Loss), Tax [Abstract]        
Tax from unrealized (loss) gain on hedging activities $ (85) $ 251 $ 113 $ 349
Tax from foreign currency translation adjustments (53) (1,688) 1,440 (1,922)
Tax from defined benefit pension and other postretirement plans $ 466 $ 175 $ 891 $ 320