Retirement Plans (Schedule Of Future Cash Flows) (Details) - USD ($)	4 Months Ended
	Jan. 21, 2018	Sep. 30, 2018	Jan. 01, 2017
Defined Benefit Plan Disclosure [Line Items]
Minimum required contribution for retirement plans			$ 0
SERP
Defined Benefit Plan Disclosure [Line Items]
Net year-to-date contributions	$ 1,100,000
Postretirement Healthcare Plans
Defined Benefit Plan Disclosure [Line Items]
Net year-to-date contributions	$ 610,000
Forecast | SERP
Defined Benefit Plan Disclosure [Line Items]
Remaining estimated net contributions during fiscal 2018		$ 3,300,000
Forecast | Postretirement Healthcare Plans
Defined Benefit Plan Disclosure [Line Items]
Remaining estimated net contributions during fiscal 2018		$ 700,000