Impairment and other charges, net Restructuring cost (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jul. 07, 2019	Jul. 08, 2018	Jul. 07, 2019	Jul. 08, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		$ (64)	$ 1,872	$ 6,722	$ 4,805
Restructuring and Related Cost, Expected Cost Remaining		200		200
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		287	1,476	5,436	2,828
Strategic Alternative Evaluation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	[1]	(351)	376	1,286	1,188
Qdoba evaluation cost [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	[2]	0	20	0	788
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.