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PROPERTY, PLANT AND EQUIPMENT (Details 2) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Dec. 26, 2015
Operating leases      
Rental expense for operating leases $ 25,612 $ 24,756 $ 25,546
Minimum lease payments under operating leases      
2016 21,562    
2017 15,839    
2018 15,639    
2019 12,227    
2020 7,325    
Subsequent 27,325    
Total minimum lease payments $ 99,917