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INDEBTEDNESS (Narrative) (Details) - USD ($)
6 Months Ended
Mar. 29, 2019
Mar. 30, 2018
Nov. 15, 2017
Financial Standby Letter of Credit      
Debt Instrument [Line Items]      
Letters of credit outstanding $ 279,000 $ 279,000  
Revolving Credit Facility      
Debt Instrument [Line Items]      
Maximum borrowing capacity     $ 125,000,000
Interest rate 3.50% 2.90%  
Revolving Credit Facility | Minimum | LIBOR      
Debt Instrument [Line Items]      
Margin percentage 1.00%    
Revolving Credit Facility | Maximum | LIBOR      
Debt Instrument [Line Items]      
Margin percentage 1.75%    
Revolving Credit Facility | Revolvers Borrowing Capacity Standard      
Debt Instrument [Line Items]      
Maximum borrowing capacity     75,000,000
Accordion feature     $ 50,000,000
Unsecured Revolving Credit Facilities At Foreign Subsidiaries      
Debt Instrument [Line Items]      
Unsecured revolving credit facilities $ 0 $ 0