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WARRANTIES (Details) - USD ($)
$ in Thousands
9 Months Ended
Jun. 28, 2020
Jun. 28, 2019
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]    
Balance at beginning of period $ 9,190 $ 8,499
Expense accruals for warranties issued during the period 8,252 6,830
Less current period warranty claims paid 6,529 5,741
Balance at end of period $ 10,913 $ 9,588