Defined Benefit Pension Plans - Schedule of Net Benefit Costs (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Defined Benefit Pension Plans And Defined Benefit Postretirement Plans Disclosure [Abstract]
Service cost	[1]	$ 248	$ 139	$ 480	$ 277
Interest cost	[2]	20	15	40	29
Expected return on plan assets	[2]	(34)	(28)	(67)	(54)
Net amortization of transitional obligation	[2],[3]		2		5
Prior service credit	[2],[3]	(5)	(5)	(11)	(11)
Actuarial loss recognized in current period	[2],[3]	33	29	65	57
Net periodic pension cost		$ 262	$ 152	$ 507	$ 303

[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).