Significant Accounting Policies - Accounts receivable Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Sep. 27, 2014
Accounts Receivable, Allowance for Doubtful Accounts [Roll Forward]
Beginning balance	$ 3,015	$ 1,155	$ 1,386
Additions charged to expenses	2,084	2,716	1,194
Deductions from reserves	(2,679)	(856)	(1,425)
Ending balance	$ 2,420	$ 3,015	$ 1,155