Benefit Plans - The Company's Pension Plan Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	$ 78,502	$ 70,676
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	20,935	20,888
Fixed income
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	56,246	46,470
Insurance contracts and other
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	756	1,793
Cash and cash equivalents, and other
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	565	1,525
Level 1
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	6,718	5,399
Level 1 | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	1,796	1,361
Level 1 | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	4,535	3,336
Level 1 | Insurance contracts and other
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Level 1 | Cash and cash equivalents, and other
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	387	702
Level 2
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Level 2 | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Level 2 | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Level 2 | Insurance contracts and other
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Level 2 | Cash and cash equivalents, and other
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Level 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	609	632
Level 3 | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Level 3 | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Level 3 | Insurance contracts and other
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	609	632
Level 3 | Cash and cash equivalents, and other
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
NAV
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	71,175	64,645
NAV | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	19,139	19,527
NAV | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	51,711	43,134
NAV | Insurance contracts and other
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	147	1,161
NAV | Cash and cash equivalents, and other
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	$ 178	$ 823