Accounts Receivables Allowances- Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2020	Sep. 27, 2019	Sep. 28, 2018
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance - beginning of year	$ 5,047	$ 6,795	$ 9,410
Provision, net	10,774	11,989	15,465
Charge-offs	(12,928)	(13,737)	(18,080)
Balance - end of year	2,893	5,047	6,795
Compensation Credits and Customer Returns Allowance
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance - beginning of year	4,500	6,300
Balance - end of year	$ 2,800	$ 4,500	$ 6,300