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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of The Changes in AOCI by Component) (Details) - USD ($)
$ in Thousands
 12 Months Ended
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