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INCOME TAXES (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 28, 2018
Dec. 29, 2017
Sep. 27, 2019
Income Tax Disclosure [Abstract]      
Net impacts of the enactment of the Tax Act $ 6,763    
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options $ 524 $ 433  
Forecast      
Income Tax Contingency [Line Items]      
Accrued interest related to uncertain income tax positions     $ 200