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BUSINESS COMBINATION (Pro Forma Results) (Details) - Uniqarta - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Apr. 03, 2021
Mar. 28, 2020
Apr. 03, 2021
Mar. 28, 2020
Business Acquisition [Line Items]        
Revenue $ 340,163 $ 150,741 $ 608,020 $ 295,038
Net income $ 72,674 $ 11,839 $ 121,068 $ 23,388