REVENUE RECOGNITION - Summary of Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 03, 2020	Mar. 29, 2019	Apr. 03, 2020	Mar. 29, 2019
Change in Contract with Customer, Asset [Abstract]
Balance at September 27, 2019			$ 23,700
Costs recovered from product returns during the period			(3,000)
Contract asset from shipments of products, subject to return during the period			3,400
Balance at April 3, 2020	$ 24,100		24,100
Change in Contract with Customer, Liability [Abstract]
Balance at September 27, 2019			26,400
Release of refund liability included in beginning of year refund liability			(3,300)
Additions to refund liabilities			3,800
Balance at April 3, 2020	26,900		26,900
Contract with customer, liability, revenue recognized	$ 1,300	$ 2,600	$ 7,400	$ 8,300