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INDEBTEDNESS (Narrative) (Details) - USD ($)
3 Months Ended
Oct. 24, 2016
Dec. 29, 2017
Nov. 15, 2017
Sep. 29, 2017
Dec. 30, 2016
Debt Instrument [Line Items]          
Unsecured revolving credit facilities   $ 0   $ 0 $ 12,730,000
Term Loans          
Debt Instrument [Line Items]          
Repayment of term loans $ 7,068,000        
Pre-payment penalty percentage 3.00%        
Interest rate 5.50%        
Financial Standby Letter of Credit          
Debt Instrument [Line Items]          
Letters of credit outstanding   $ 279,000     $ 392,000
Revolving Credit Facility          
Debt Instrument [Line Items]          
Interest rate   2.50%     2.00%
Maximum borrowing capacity     $ 125,000    
Revolving Credit Facility | Maximum | LIBOR          
Debt Instrument [Line Items]          
Margin percentage   1.75%      
Revolving Credit Facility | Minimum | LIBOR          
Debt Instrument [Line Items]          
Margin percentage   1.00%      
Revolving Credit Facility | Revolvers Borrowing Capacity Standard          
Debt Instrument [Line Items]          
Maximum borrowing capacity     75,000,000    
Accordion feature     $ 50,000    
Unsecured Revolving Credit Facilities At Foreign Subsidiaries          
Debt Instrument [Line Items]          
Unsecured revolving credit facilities   $ 0     $ 0