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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of The Changes in AOCI by Component) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 29, 2023 | Sep. 30, 2022
AOCI Attributable To Parent Net Of Tax (Roll Forward) |  |
Balance, beginning of period | $ 488,014 |
Other comprehensive income before reclassifications | 2,627 | $ (6,795)
Amounts reclassified from accumulated other comprehensive income | 45 | 45
Tax effects | 31 | (16)
Balance, end of period | 499,737 | 488,014
Foreign Currency Translation Adjustment |  |
AOCI Attributable To Parent Net Of Tax (Roll Forward) |  |
Balance, beginning of period | 791 | 7,606
Other comprehensive income before reclassifications | 2,790 | (6,815)
Amounts reclassified from accumulated other comprehensive income | 0 | 0
Tax effects | 0 | 0
Balance, end of period | 3,581 | 791
Unrealized loss on available-for-sale securities |  |
AOCI Attributable To Parent Net Of Tax (Roll Forward) |  |
Balance, beginning of period | 0 |
Other comprehensive income before reclassifications | (163) |
Amounts reclassified from accumulated other comprehensive income | 0 |
Tax effects | 42 |
Balance, end of period | (121) | 0
Unamortized loss on defined benefit pension plans |  |
AOCI Attributable To Parent Net Of Tax (Roll Forward) |  |
Balance, beginning of period | (171) | (220)
Other comprehensive income before reclassifications | 0 | 20
Amounts reclassified from accumulated other comprehensive income | 45 | 45
Tax effects | (11) | (16)
Balance, end of period | (137) | (171)
Accumulated Other Comprehensive Income (Loss) |  |
AOCI Attributable To Parent Net Of Tax (Roll Forward) |  |
Balance, beginning of period | 620 | 7,386
Balance, end of period | $ 3,323 | $ 620

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