Debt - Narrative (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jun. 30, 2014	Oct. 03, 2015	Sep. 27, 2014	Sep. 28, 2013	Apr. 04, 2015
Debt Instrument [Line Items]
Debt issuance cost paid to lenders		$ 12,700,000
Interest expense		$ 19,100,000	$ 6,200,000	$ 2,400,000
Senior Term Loan | Senior Credit Facility
Debt Instrument [Line Items]
Face amount	$ 235,000,000.0
Debt term	6 years
Stated interest rate (as a percent)					5.00%
Effective interest rate (as a percent)		6.50%	6.50%
Long-term line of credit		$ 198,300,000	$ 235,000,000
Weighted average interest rate (as a percent)		7.80%	7.80%
Base Rate | Senior Term Loan | Senior Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		4.50%	4.50%
LIBOR | Senior Term Loan | Senior Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		5.50%	5.50%
Variable rate floor (as a percent)		0.01%	0.01%
Revolving Credit Facility | Credit Facility | Senior Revolving Credit Facility
Debt Instrument [Line Items]
Debt term		5 years
Maximum borrowing capacity		$ 60,000,000.0
Line of credit, amount outstanding		$ 0	$ 0
Commitment fee (as a percent)		0.50%
Revolving Credit Facility | Base Rate | Credit Facility | Senior Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		4.50%	4.50%
Revolving Credit Facility | LIBOR | Credit Facility | Senior Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		5.50%	5.50%
Letters of Credit | Credit Facility | Senior Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 15,000,000.0
Line of credit, amount outstanding		$ 5,100,000	$ 5,300,000