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Other Operating, Net (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 29, 2013
Jun. 30, 2012
Jun. 29, 2013
Jun. 30, 2012
Other Income and Expenses [Abstract]        
Other operating income (loss), associated with foreign currency gains (losses) $ (1,014) $ 159 $ (1,434) $ 519
Other operating income 50 0 130 0
Other operating income (loss) $ 964 $ (159) $ 1,304 $ (519)