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INTANGIBLE AND OTHER ASSETS (Amortization Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 30, 2019
Mar. 31, 2018
INTANGIBLE AND OTHER ASSETS    
Amortization expense for intangible assets $ 1,700 $ 3,000
Estimated aggregate future amortization expense by fiscal year    
2019 (remaining) 5,115  
2020 6,309  
2021 2,483  
2022 1,629  
2023 59  
2024 $ 51