Goodwill and Intangible Assets - Schedule of intangible assets subject to amortization (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020	Dec. 31, 2020
Finite-lived Intangible Assets [Roll Forward]
Intangible assets subject to amortization, beginning balance			$ 980,310
Intangible assets acquired during the period			4,628
Currency translation during the period			(25,614)
Intangible assets subject to amortization, ending balance	$ 959,324		959,324
Accumulated amortization, beginning balance			755,971
Amortization during the period	7,336	$ 6,980	14,834	$ 13,856
Currency translation during the period			(20,703)
Accumulated amortization, ending balance	750,102		750,102
Intangible assets subject to amortization, net as of July 3, 2021	209,222		209,222		$ 224,339
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Intangible assets subject to amortization, beginning balance			699,795
Intangible assets acquired during the period			0
Currency translation during the period			(15,911)
Intangible assets subject to amortization, ending balance	683,884		683,884
Accumulated amortization, beginning balance			481,256
Amortization during the period			14,025
Currency translation during the period			(10,992)
Accumulated amortization, ending balance	484,289		484,289
Intangible assets subject to amortization, net as of July 3, 2021	199,595		199,595
Patents
Finite-lived Intangible Assets [Roll Forward]
Intangible assets subject to amortization, beginning balance			273,570
Intangible assets acquired during the period			4,628
Currency translation during the period			(9,709)
Intangible assets subject to amortization, ending balance	268,489		268,489
Accumulated amortization, beginning balance			273,426
Amortization during the period			131
Currency translation during the period			(9,693)
Accumulated amortization, ending balance	263,864		263,864
Intangible assets subject to amortization, net as of July 3, 2021	4,625		4,625
Other
Finite-lived Intangible Assets [Roll Forward]
Intangible assets subject to amortization, beginning balance			6,945
Intangible assets acquired during the period			0
Currency translation during the period			6
Intangible assets subject to amortization, ending balance	6,951		6,951
Accumulated amortization, beginning balance			1,289
Amortization during the period			678
Currency translation during the period			(18)
Accumulated amortization, ending balance	1,949		1,949
Intangible assets subject to amortization, net as of July 3, 2021	$ 5,002		$ 5,002