Debt - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Oct. 04, 2017
Debt Instrument [Line Items]
Deferred financing costs	$ 2,429
Senior Secured Term Loan Facility | Secured Debt
Debt Instrument [Line Items]
Deferred financing costs	$ 2,400
Weighted average interest rate (as a percent)	4.40%
Interest expense	$ 9,100
Deferred financing costs amortization	$ 400
Interest rate above applicable rate (as a percent)		2.00%