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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, 2017
Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Balance, beginning of period $ 207,496  
Other comprehensive income before reclassifications 3,060 $ (2,552)
Amounts reclassified from accumulated other comprehensive income 795 317
Tax effects (1,216) 952
Balance, end of period 243,004 207,496
Foreign currency translation adjustments    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Balance, beginning of period 10,525 10,253
Other comprehensive income before reclassifications 590 521
Amounts reclassified from accumulated other comprehensive income 64 (249)
Tax effects 0 0
Balance, end of period 11,179 10,525
Unamortized loss on pension plans    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Balance, beginning of period (8,171) (6,616)
Other comprehensive income before reclassifications 2,470 (3,073)
Amounts reclassified from accumulated other comprehensive income 731 566
Tax effects (1,216) 952
Balance, end of period (6,186) (8,171)
Accumulated Other Comprehensive Income (Loss)    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Balance, beginning of period 2,354 3,637
Balance, end of period $ 4,993 $ 2,354