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INTANGIBLE AND OTHER ASSETS (Amortization Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Sep. 28, 2019
Sep. 29, 2018
INTANGIBLE AND OTHER ASSETS        
Amortization expense for intangible assets $ 1,700 $ 2,900 $ 5,100 $ 8,900
Estimated aggregate future amortization expense by fiscal year        
2019 (remaining) 1,880   1,880  
2020 7,029   7,029  
2021 3,207   3,207  
2022 2,367   2,367  
2023 809   809  
Thereafter $ 1,365   $ 1,365