Impairment and other charges, net Restructuring cost (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Apr. 14, 2019	Apr. 15, 2018	Apr. 14, 2019	Apr. 15, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		$ 946	$ 2,575	$ 6,786	$ 2,933
Restructuring and Related Cost, Expected Cost Remaining		600		600
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		642	1,808	5,148	1,352
Strategic Alternative Evaluation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	[1]	304	0	1,638	0
Qdoba evaluation cost [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	[2]	0	767	0	1,580
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		$ 0	$ 0	$ 0	$ 1

[1] Strategic Alternative Evaluation costs are primarily related to third party advisory services.

[2] Qdoba Evaluation costs are primarily related to retention compensation and third party advisory services.