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DEBT AND OTHER OBLIGATIONS (Narrative) (Details)
$ in Thousands
12 Months Ended
Sep. 29, 2019
USD ($)
Feb. 15, 2019
USD ($)
Oct. 03, 2020
USD ($)
renewal_option
Sep. 29, 2020
USD ($)
Sep. 28, 2019
USD ($)
Sep. 29, 2018
USD ($)
Sep. 30, 2017
USD ($)
Dec. 01, 2013
USD ($)
ft²
Nov. 22, 2013
USD ($)
Debt Instrument [Line Items]                  
Area of Land | ft²               198,000  
Percentage Of Building Area Agreed To Lease From Landlord               70.00%  
Financing obligation     $ 0   $ 14,207     $ 20,000  
Cumulative effect of accounting changes         (769) $ 534 $ 5,420    
Retained earnings                  
Debt Instrument [Line Items]                  
Cumulative effect of accounting changes         (769) $ 534 $ 4,006    
Scenario, Forecast [Member] | Accounting Standards Update 2016-02 [Member]                  
Debt Instrument [Line Items]                  
Financing obligation $ (14,500)                
Decrease property, plant and equipment 15,300     $ 15,300          
Scenario, Forecast [Member] | Accounting Standards Update 2016-02 [Member] | Retained earnings                  
Debt Instrument [Line Items]                  
Cumulative effect of accounting changes $ 800                
K&S Corporate Headquarters [Member]                  
Debt Instrument [Line Items]                  
Lessee Leasing Arrangements, Capital Leases, Renewal Term     10 years            
Annual Rent and Service Charge Minimum Range     $ 4,000            
Annual Rent and Service Charge Maximum Range     $ 5,000            
Lessee Leasing Arrangements, Capital Leases, Term of Contract     10 years            
Lessee Leasing Arrangements, Capital Leases, Number of Renewal Options | renewal_option     2            
Capital Lease Obligations, Interest Rate, Effective Percentage     6.30%            
Building [Member]                  
Debt Instrument [Line Items]                  
Property, Plant and Equipment, Useful Life     25 years            
Citibank [Member]                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Maximum Borrowing Capacity                 $ 5,000
Long-term Line of Credit     $ 3,300   $ 3,100        
MUFG Bank, Ltd., Singapore Branch [Member] | Facility Agreements [Member]                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Maximum Borrowing Capacity   $ 150,000              
Current and Noncurrent Portion [Member]                  
Debt Instrument [Line Items]                  
Financing obligation     $ 15,000            
London Interbank Offered Rate (LIBOR) [Member] | MUFG Bank, Ltd., Singapore Branch [Member] | Facility Agreements [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate   1.50%