Benefit Plans - Benefit Plan Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Change in fair value of plan assets:
Beginning balance	$ 164,603
Ending balance	183,486	$ 164,603
Actuarial net loss	1,600
Prior service credit	$ (900)
Payable maximum period to be considered current	12 months
Components of net periodic benefit cost [Abstract]
Net periodic benefit (income) cost	$ (465)	(2,914)	$ (1,150)
Weighted average assumptions in net periodic benefit calculations [Abstract]
Ultimate health care cost trend rate	4.10%
Minimum [Member]
Weighted average assumptions in net periodic benefit calculations [Abstract]
Annual assumed rate of increase in the per capita cost of covered benefits	4.00%
Maximum [Member]
Weighted average assumptions in net periodic benefit calculations [Abstract]
Annual assumed rate of increase in the per capita cost of covered benefits	7.00%
Pension Plan [Member]
Change in benefit obligation [Roll Forward]
Obligation at beginning of year	$ 166,739	186,766
Service cost	0	88	128
Interest cost	5,972	5,745	6,344
Actuarial loss (gain)	17,061	(10,637)
Benefit payments	(9,883)	(10,368)
Settlement charge	0	0
Foreign currency translation adjustment	2,275	(4,855)
Obligation at end of year	182,164	166,739	186,766
Change in fair value of plan assets:
Beginning balance	164,603	186,336
Actual return on plan assets	26,734	(8,282)
Employer contributions	0	999
Benefit payments	(9,883)	(10,368)
Foreign currency translation adjustment	2,032	(4,082)
Ending balance	183,486	164,603	186,336
Funded (underfunded) status at end of year	1,322	(2,136)
Unrecognized net actuarial loss	36,195	39,101
Unrecognized prior service credit	0	0
Funded status of the plans recognized [Abstract]
Long-term asset	8,592	10,580
Current liability	0	0
Long-term liability	(7,270)	(12,716)
Total funded (underfunded) status	1,322	(2,136)
Components of net periodic benefit cost [Abstract]
Service cost	0	88	128
Interest cost	5,972	5,745	6,344
Expected return on plan assets	(8,103)	(9,522)	(9,374)
Amortization of net (gain) loss	1,950	1,151	2,206
Net periodic benefit (income) cost	$ (181)	$ (2,538)	$ (696)
Weighted average assumptions in benefit obligations calculations [Abstract]
Discount rate	1.93%	3.72%
Expected long-term return on plan assets	3.84%	5.05%
Rate of inflation	3.20%	3.40%
Weighted average assumptions in net periodic benefit calculations [Abstract]
Discount rate	3.72%	3.22%	3.61%
Expected long-term return on plan assets	5.05%	5.27%	5.56%
Rate of inflation	3.40%	3.30%	3.30%
Other Postretirement Benefits Plan [Member]
Change in benefit obligation [Roll Forward]
Obligation at beginning of year	$ 14,382	$ 16,407
Service cost	260	235	$ 235
Interest cost	609	447	599
Actuarial loss (gain)	(1,860)	(1,185)
Benefit payments	(832)	(892)
Settlement charge	(198)	(171)
Foreign currency translation adjustment	292	(459)
Obligation at end of year	12,653	14,382	16,407
Change in fair value of plan assets:
Beginning balance	0	0
Actual return on plan assets	0	0
Employer contributions	832	892
Benefit payments	(832)	(892)
Foreign currency translation adjustment	0	0
Ending balance	0	0	0
Funded (underfunded) status at end of year	(12,653)	(14,382)
Unrecognized net actuarial loss	(1,609)	170
Unrecognized prior service credit	(5,485)	(6,387)
Funded status of the plans recognized [Abstract]
Long-term asset	0	0
Current liability	(1,013)	(1,080)
Long-term liability	(11,640)	(13,302)
Total funded (underfunded) status	(12,653)	(14,382)
Components of net periodic benefit cost [Abstract]
Service cost	260	235	235
Interest cost	609	447	599
Amortization of net (gain) loss	(88)	92	(42)
Amortization of prior service credit	(902)	(902)	(901)
Settlement charge	(2)	38	17
Net periodic benefit (income) cost	$ (123)	$ (90)	$ (92)
Weighted average assumptions in benefit obligations calculations [Abstract]
Discount rate	3.70%	4.56%
Rate of compensation increases	5.00%	5.00%
Weighted average assumptions in net periodic benefit calculations [Abstract]
Discount rate	4.56%	3.89%	4.21%
Rate of compensation increases	5.00%	5.00%	5.00%
Foreign Plan [Member] | Pension Plan [Member]
Change in fair value of plan assets:
Percent of above benefit obligation on company sponsored UK pension plan	43.00%	45.00%
Percent above plan assets on company sponsored UK pension plan	39.00%	37.00%