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VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($)
$ in Thousands
 12 Months Ended
Oct. 02, 2020
Sep. 27, 2019
Sep. 28, 2018
Allowance for doubtful accounts      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Year $ 2,550 $ 1,637 $ 2,231
Additions Charged to Costs and Expenses 2,095 2,003 21
Less Deductions 1,948 1,090 615
Balance at End of Year 2,697 2,550 1,637
Reserves for inventory valuation      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Year 5,223 5,124 5,428
Additions Charged to Costs and Expenses 878 1,009 394
Less Deductions 716 910 698
Balance at End of Year 5,385 5,223 5,124
Valuation of deferred tax assets      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Year 5,964 6,402 8,724
Additions Charged to Costs and Expenses 875 430 1,148
Less Deductions 315 868 3,470
Balance at End of Year 6,524 5,964 6,402
Reserves for sales returns      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Year 4,880 1,532 1,930
Additions Charged to Costs and Expenses 1,532 7,040 3,927
Less Deductions 3,369 3,692 4,325
Balance at End of Year $ 3,043 $ 4,880 $ 1,532