Retirement Plans (Schedule Of Future Cash Flows) (Details) - USD ($) $ in Thousands	4 Months Ended	9 Months Ended
	Jan. 17, 2016	Oct. 02, 2016	Jan. 01, 2015
Defined Benefit Plan Disclosure [Line Items]
Minimum required contribution for retirement plans			$ 0
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net year-to-date contributions	$ 1,496
Postretirement Healthcare Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net year-to-date contributions	$ 387
Scenario, Forecast [Member] | Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year		$ 23,000
Scenario, Forecast [Member] | Postretirement Healthcare Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year		$ 900