Retirement Plans (Schedule Of Future Cash Flows) (Details) - USD ($)	6 Months Ended
	Oct. 01, 2017	Apr. 16, 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		$ 2,243,000
Postretirement Healthcare Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer		$ 530,000
Scenario, Forecast [Member] | SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year	$ 2,300,000
Scenario, Forecast [Member] | Postretirement Healthcare Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year	$ 800,000