Defined Benefit Pension Plans - Schedule of Net Benefit Costs (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 02, 2020	Sep. 27, 2019	Oct. 02, 2020	Sep. 27, 2019
Compensation And Retirement Disclosure [Abstract]
Service cost	[1]	$ 320	$ 240	$ 959	$ 720
Interest cost	[2]	12	20	34	60
Expected return on plan assets	[2]	(47)	(36)	(136)	(103)
Prior service credit	[2],[3]	(9)	(6)	(26)	(17)
Actuarial loss recognized in current period	[2],[3]	79	32	238	97
Net periodic pension cost		$ 355	$ 250	$ 1,069	$ 757

[1] Recognized in selling general and administrative expenses on the Condensed Consolidated Statements of Income.

[2] Recognized in other income (expense), net on the Condensed Consolidated Statements of Income.

[3] Amounts reclassified from accumulated other comprehensive income (loss).