Benefit Plans - Benefit Plan Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Change in fair value of plan assets:
Beginning balance	$ 186,336
Ending balance	164,603	$ 186,336
Actuarial net loss	1,800
Prior service credit	$ (900)
Payable maximum period to be considered current	12 months
Funded status of the plans recognized [Abstract]
Long-term liability	$ (14,237)	(11,606)
Components of net periodic benefit cost [Abstract]
Net periodic benefit (income) cost	$ (2,914)	(1,150)	$ 1,687
Weighted average assumptions in net periodic benefit calculations [Abstract]
Ultimate health care cost trend rate	3.00%
Minimum [Member]
Weighted average assumptions in net periodic benefit calculations [Abstract]
Annual assumed rate of increase in the per capita cost of covered benefits	6.40%
Maximum [Member]
Weighted average assumptions in net periodic benefit calculations [Abstract]
Annual assumed rate of increase in the per capita cost of covered benefits	8.40%
Pension Plan [Member]
Change in benefit obligation [Roll Forward]
Obligation at beginning of year	$ 186,766	178,736
Service cost	88	128	532
Interest cost	5,745	6,344	7,553
Actuarial (gain) loss	(10,637)	4,688
Benefit payments	(10,368)	(10,171)
Settlement charge	0	0
Foreign currency translation adjustment	(4,855)	7,041
Obligation at end of year	166,739	186,766	178,736
Change in fair value of plan assets:
Beginning balance	186,336	169,140
Actual return on plan assets	(8,282)	19,175
Employer contributions	999	2,271
Benefit payments	(10,368)	(10,171)
Foreign currency translation adjustment	(4,082)	5,921
Ending balance	164,603	186,336	169,140
Underfunded status at end of year	(2,136)	(430)
Unrecognized net actuarial loss	39,101	34,627
Unrecognized prior service credit	0	0
Funded status of the plans recognized [Abstract]
Long-term asset	10,580	9,894
Current liability	0	0
Long-term liability	(12,716)	(10,324)
Total underfunded status	(2,136)	(430)
Components of net periodic benefit cost [Abstract]
Service cost	88	128	532
Interest cost	5,745	6,344	7,553
Expected return on plan assets	(9,522)	(9,374)	(9,615)
Amortization of net loss (gain)	1,151	2,206	2,898
Settlement charge	0	0	1,214
Net periodic benefit (income) cost	$ (2,538)	$ (696)	$ 2,582
Weighted average assumptions in benefit obligations calculations [Abstract]
Discount rate	3.72%	3.22%
Expected long-term return on plan assets	5.05%	5.27%
Rate of inflation	3.40%	3.30%
Weighted average assumptions in net periodic benefit calculations [Abstract]
Discount rate	3.22%	3.61%	4.02%
Expected long-term return on plan assets	5.27%	5.56%	5.59%
Rate of inflation	3.30%	3.30%	3.20%
Other Postretirement Benefits Plan [Member]
Change in benefit obligation [Roll Forward]
Obligation at beginning of year	$ 16,407	$ 15,274
Service cost	235	235	$ 232
Interest cost	447	599	594
Actuarial (gain) loss	(1,185)	923
Benefit payments	(892)	(883)
Settlement charge	(171)	(209)
Foreign currency translation adjustment	(459)	468
Obligation at end of year	14,382	16,407	15,274
Change in fair value of plan assets:
Beginning balance	0	0
Actual return on plan assets	0	0
Employer contributions	892	883
Benefit payments	(892)	(883)
Foreign currency translation adjustment	0	0
Ending balance	0	0	0
Underfunded status at end of year	(14,382)	(16,407)
Unrecognized net actuarial loss	170	1,540
Unrecognized prior service credit	(6,387)	(7,289)
Funded status of the plans recognized [Abstract]
Long-term asset	0	0
Current liability	(1,080)	(1,070)
Long-term liability	(13,302)	(15,337)
Total underfunded status	(14,382)	(16,407)
Components of net periodic benefit cost [Abstract]
Service cost	235	235	232
Interest cost	447	599	594
Amortization of net loss (gain)	92	(42)	(60)
Amortization of prior service credit	(902)	(901)	(896)
Settlement charge	38	17	0
Net periodic benefit (income) cost	$ (90)	$ (92)	$ (130)
Weighted average assumptions in benefit obligations calculations [Abstract]
Discount rate	4.56%	3.89%
Rate of compensation increases	5.00%	5.00%
Weighted average assumptions in net periodic benefit calculations [Abstract]
Discount rate	3.89%	4.21%	4.25%
Rate of compensation increases	5.00%	5.00%	5.00%
United Kingdom [Member] | Pension Plan [Member]
Change in fair value of plan assets:
Percent of above benefit obligation on company sponsored UK pension plan	45.00%	44.00%
Percent above plan assets on company sponsored UK pension plan	37.00%	39.00%