Retirement Plans (Schedule Of Future Cash Flows) (Details) - USD ($)	4 Months Ended
	Jan. 19, 2020	Jan. 01, 2018
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	$ 1,639,000
Remaining estimated net contributions during fiscal 2020	3,732,000
Postretirement Healthcare Plans
Defined Benefit Plan Disclosure [Line Items]
Net year-to-date contributions	386,000
Remaining estimated net contributions during fiscal 2020	$ 1,011,000