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SIGNIFICANT ACCOUNTING POLICIES - Cash Flow (Details) - USD ($)
$ in Thousands
6 Months Ended
Jul. 01, 2018
Jun. 25, 2017
Cash Flow Information    
Interest paid (net of amount capitalized) $ 29,244 $ 35,127
Income taxes paid (net of refunds) 12,019 $ 8,870
Other non-cash financing activities    
Reduction of financing obligation due to sale of real properties by pension plan (2,667)  
Reduction of PP&E due to sale of real properties by pension plan $ (2,854)