Income Taxes - Schedule of Reconciliation of Beginning and Ending Amounts of Unrecognized Income Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of fiscal year	$ 2,799	$ 2,353	$ 2,368
Gross increases for tax positions of prior years	184	534	73
Gross increases for tax positions of the current year	163	0	0
Gross decreases for tax positions of prior years	(31)	(88)	(88)
Balance at end of fiscal year	$ 3,115	$ 2,799	$ 2,353