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WARRANTIES (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 29, 2017
Dec. 30, 2016
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]    
Balance at beginning of period $ 6,393 $ 4,326
Expense accruals for warranties issued during the period 2,490 1,448
Less current period warranty claims paid 1,475 993
Balance at end of period $ 7,408 $ 4,781