Retirement Plans (Schedule Of Future Cash Flows) (Details) - USD ($)	4 Months Ended	8 Months Ended
	Jan. 22, 2017	Oct. 01, 2017	Jan. 01, 2016
Defined Benefit Plan Disclosure [Line Items]
Minimum required contribution for retirement plans			$ 0
SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	$ 1,122,000
Postretirement Healthcare Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	$ 318,000
Scenario, Forecast [Member] | SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year		$ 3,400,000
Scenario, Forecast [Member] | Postretirement Healthcare Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year		$ 1,000,000