Benefit Plans - Pension Assets by Percentage (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Long-term asset	$ 183,486	$ 164,603
Cash and Cash Equivalents [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Long-term asset	12,318	12,984
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Long-term asset	$ 183,486	$ 164,603	$ 186,336
Asset category [Abstract]
Total plan assets (as a percent)	100.00%	100.00%
Expected long-term rate of return on plan assets	3.84%	5.05%
Pension Plan [Member] | Fixed Income Funds [Member]
Asset category [Abstract]
Total plan assets (as a percent)	55.00%	54.00%
Pension Plan [Member] | Multi-Asset [Member]
Asset category [Abstract]
Total plan assets (as a percent)	9.00%	0.00%
Pension Plan [Member] | Equity Securities [Member]
Asset category [Abstract]
Total plan assets (as a percent)	25.00%	35.00%
Pension Plan [Member] | Cash and Cash Equivalents [Member]
Asset category [Abstract]
Total plan assets (as a percent)	7.00%	8.00%
Pension Plan [Member] | Alternative Investments [Member]
Asset category [Abstract]
Total plan assets (as a percent)	4.00%	3.00%
Pension Plan [Member] | Minimum [Member] | Fixed Income Funds [Member]
Asset category [Abstract]
Total plan assets (as a percent)	60.00%
Pension Plan [Member] | Maximum [Member] | Equity Securities [Member]
Asset category [Abstract]
Total plan assets (as a percent)	30.00%
Pension Plan [Member] | Maximum [Member] | Alternative Investments [Member]
Asset category [Abstract]
Total plan assets (as a percent)	5.00%