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ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
Dec. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Total accumulated other comprehensive loss $ (32,318) $ (26,496) $ (32,318) $ (26,496) $ (29,093)
Foreign currency translation adjustments 3,213 4,157 (3,225) 8,244  
Cumulative Foreign Currency Translation Adjustments [Member]          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Total accumulated other comprehensive loss (24,510) (19,380) (24,510) (19,380) (21,285)
Pension and Post-retirement Liability Adjustment [Member]          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Total accumulated other comprehensive loss $ (7,808) $ (7,116) (7,808) (7,116) (7,808)
Tax impact     $ 4,400 $ 4,200 $ 4,400