Significant Accounting Policies - Accounts receivable Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Sep. 28, 2013
Accounts Receivable, Allowance for Doubtful Accounts [Roll Forward]
Beginning balance	$ 1,155	$ 1,386	$ 1,443
Additions charged to expenses	2,716	1,194	1,622
Deductions from reserves	(856)	(1,425)	(1,679)
Ending Balance	$ 3,015	$ 1,155	$ 1,386