Summary of Restructuring Charges by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2022	Jul. 02, 2021	Jul. 01, 2022	Jul. 02, 2021
Restructuring Cost And Reserve [Line Items]
Restructuring costs	$ 610	$ 1,165	$ 1,232	$ 2,711
2020 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring costs	610	1,165	1,232	2,503
2020 Restructuring | Photonics
Restructuring Cost And Reserve [Line Items]
Restructuring costs	501	195	1,194	490
2020 Restructuring | Vision
Restructuring Cost And Reserve [Line Items]
Restructuring costs	65	275	106	697
2020 Restructuring | Precision Motion
Restructuring Cost And Reserve [Line Items]
Restructuring costs	$ 44	$ 695	$ (68)	$ 1,316