Postretirement Benefits Expected Future Benefit Payments (Details) $ in Thousands	12 Months Ended
	Jan. 01, 2017 USD ($)
Compensation and Retirement Disclosure [Abstract]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	$ 145
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	145
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	165
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	167
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	166
Defined Benefit Plan, Expected Future Benefit Payments, Rolling Year Five	173
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	$ 1,092