Discontinued Operations - Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 08, 2018	Jul. 09, 2017	Jul. 08, 2018	Jul. 09, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Basic (in usd per share)	$ (0.10)	$ 0.17	$ 0.66	$ 0.26
Diluted (in usd per share)	$ (0.10)	$ 0.17	$ 0.65	$ 0.26
Qdoba
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Company restaurant sales	$ 0	$ 107,067	$ 192,620	$ 334,559
Franchise revenues	0	4,678	9,337	15,442
Company restaurant costs (excluding depreciation and amortization)	0	(84,747)	(166,122)	(271,176)
Franchise costs (excluding depreciation and amortization)	0	(879)	(2,338)	(2,962)
Selling, general and administrative expenses	(202)	(8,232)	(18,314)	(28,617)
Depreciation and amortization expenses	0	(5,023)	(5,012)	(16,775)
Impairment and other charges, net	(123)	(1,815)	(2,386)	(9,530)
Interest expense, net	0	(2,229)	(4,787)	(6,788)
Operating (losses) earnings from discontinued operations before income taxes	(325)	8,820	2,998	14,153
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	(3,648)	0	32,081	0
(Losses) earnings from discontinued operations before income taxes	(3,973)	8,820	35,079	14,153
Income taxes	1,097	(3,398)	(15,927)	(5,455)
(Losses) earnings from discontinued operations, net of income taxes	$ (2,876)	$ 5,422	$ 19,152	$ 8,698
Basic (in usd per share)	$ (0.10)	$ 0.18	$ 0.66	$ 0.28
Diluted (in usd per share)	$ (0.10)	$ 0.18	$ 0.65	$ 0.28
Term Loan [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Repayments of Debt			$ 260,000
Term Loan [Member] | Qdoba
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Repayments of Debt			$ 260,000