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Interest and Other Expense (Income), Net (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jul. 01, 2012
Jun. 30, 2013
Jul. 01, 2012
Other Income and Expenses [Abstract]        
Interest income $ (64) $ (150) $ (169) $ (360)
Interest expense 11,913 11,339 23,606 22,776
Other expense, net 1,016 169 1,468 1,772
Total interest and other expense, net $ 12,865 $ 11,358 $ 24,905 $ 24,188