Discontinued Operations (Details) $ / shares in Units, $ in Thousands		12 Months Ended
		Oct. 02, 2016 USD ($) center restaurant $ / shares		Sep. 27, 2015 USD ($) $ / shares	Sep. 28, 2014 USD ($) $ / shares
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset impairment charges		$ (544)		$ (557)	$ (570)
number of distribution center leases assigned to third parties | center		1
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		$ (2,197)		$ (3,789)	$ (5,894)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share | $ / shares		$ (0.07)		$ (0.10)	$ (0.14)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share | $ / shares		$ (0.06)		$ (0.10)	$ (0.14)
Discontinued Operations [Member] | Discontinued Operation - Distribution Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Distribution Centers | center		1
Discontinued Operations [Member] | 2013 Qdoba Closures [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Terminated Lease Agreements		3
Asset impairment charges		$ 0		$ 0	$ (2,170)
Disposal Group, Including Discontinued Operation, Future Lease Commitments Net of Straightline Rent and Tenant Improvement Reversals		(2,818)		(4,594)	(4,536)
Provision for Doubtful Accounts		(234)		(366)	0
Disposal group, Including Discontinued Operations, Brokerage Commissions		(58)		(234)	(652)
Restructuring Reserve		$ 2,943	[1]	4,256
Number of Restaurants | restaurant		62
Restructuring Reserve, Accrual Adjustment	[2]	$ 2,818
Cash paid to settle restructuring reserve		(4,131)
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax		(3,181)		(5,496)	(8,247)
Disposal Group, Including Discontinued Operation, Other Expense		$ (71)		$ (302)	$ (889)
Locations Subleased at a Loss		6
Locations Marketed for Sublease		16
Discontinued Operations [Member] | 2013 Qdoba Closures [Member] | Weighted Average [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
RemainingLeaseCommitmentTerm		3 years

[1] (2)The weighted average remaining lease term related to these commitments is approximately three years

[2] (1)Adjustments relate to revisions to certain sublease and cost assumptions due to changes in market conditions, as well as a charge to terminate three lease agreements, and includes interest expense.