Postretirement Benefits Expected Future Benefit Payments (Details) $ in Thousands	Dec. 30, 2018 USD ($)
Retirement Benefits [Abstract]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	$ 149
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	149
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	169
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	170
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	191
Defined Benefit Plan, Expected Future Benefit Payments, Rolling Year Five	185
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 1,178