Retirement Plans (Schedule Of Future Cash Flows) (Details) - USD ($)	6 Months Ended
	Apr. 15, 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	$ 2,200,000
Postretirement Healthcare Plans
Defined Benefit Plan Disclosure [Line Items]
Net year-to-date contributions	$ 877,000
Forecast | SERP
Defined Benefit Plan Disclosure [Line Items]
Remaining estimated net contributions during fiscal 2018		$ 2,200,000
Forecast | Postretirement Healthcare Plans
Defined Benefit Plan Disclosure [Line Items]
Remaining estimated net contributions during fiscal 2018		$ 500,000