Postretirement Benefits Expected Future Benefit Payments (Details) $ in Thousands	Dec. 29, 2019 USD ($)
Retirement Benefits [Abstract]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	$ 142
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	142
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	157
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	173
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	156
Defined Benefit Plan, Expected Future Benefit Payments, Rolling Year Five	155
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 1,065