Employee Benefit Plans (Schedule of Net Funded Status, Other Postretirement Benefit Plans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.09%	4.09%	3.60%
Change in benefit obligations:
Projected benefit obligations at beginning of year	$ 3,100	$ 2,911
Service cost	73	87	$ 106
Interest cost	94	116	120
Defined Benefit Plan, Benefit Obligation, Benefits Paid	101	122
Actuarial loss (gain)	(179)	108
Change in accumulated benefit obligations during the year	(113)	189
Projected benefit obligations at end of year	2,988	3,100	2,911
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	19,216	16,279
Actual return on plan assets	2,756	2,937
Fair value of plan assets at end of year	21,972	19,216	$ 16,279
Net amounts recognized in the consolidated balance sheets	18,984	16,116
Assets for Plan Benefits, Defined Benefit Plan	18,984	16,116
Prior service cost	$ 0	$ 0
Discount rate	2.34%	3.09%
Expected rate of return on assets	7.25%	7.25%	7.25%
Retirees [Member]
Change in benefit obligations:
Projected benefit obligations at beginning of year	$ 611	$ 583
Projected benefit obligations at end of year	545	611	$ 583
Active Employees Eligible to Retire [Member]
Change in benefit obligations:
Projected benefit obligations at beginning of year	420	362
Projected benefit obligations at end of year	1,232	420	362
Other Active Employees [Member]
Change in benefit obligations:
Projected benefit obligations at beginning of year	2,069	1,966
Projected benefit obligations at end of year	$ 1,211	$ 2,069	$ 1,966