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SHAREHOLDERS' EQUITY AND EMPLOYEE BENEFIT PLANS (Total equity-based compensation expense) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2023 | Oct. 01, 2022 | Oct. 02, 2021
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Total equity-based compensation expense (reversal) | $ 22,744 | $ 18,986 | $ 15,502
Relative TSR PSUs |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Total equity-based compensation expense (reversal) | 4,949 | 4,255 | 3,916
Time-based RSUs |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Total equity-based compensation expense (reversal) | 14,304 | 11,655 | 10,314
Growth PSUs |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Total equity-based compensation expense (reversal) | 2,491 | 2,127 | 444
Common Stock |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Total equity-based compensation expense (reversal) | 1,000 | 949 | 828
Cost of sales |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Total equity-based compensation expense (reversal) | 1,192 | 960 | 828
Selling, general and administrative |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Total equity-based compensation expense (reversal) | 16,239 | 13,911 | 10,998
Research and development |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Total equity-based compensation expense (reversal) | $ 5,313 | $ 4,115 | $ 3,676

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