Employee Retirement Plans Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2021 USD ($)	Sep. 26, 2020 USD ($)	Oct. 02, 2021 USD ($) plan	Sep. 26, 2020 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of defined contribution 401K savings plans | plan			2
Non-US Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 194	$ 649	$ 584	$ 1,918
Interest cost	4,287	6,456	12,927	19,086
Expected return on assets	(19,516)	(18,089)	(58,851)	(53,476)
Amortization of net loss (gain)	3,150	842	9,498	2,489
Amortization of prior service cost (credit)	716	642	2,158	1,897
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (11,169)	$ (9,500)	$ (33,684)	$ (28,086)