Other (Income) Expense, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Other operating (income) expense, net:
(Gain) loss on property, plant and equipment disposals	$ 353	$ (1,047)	$ 170
Gain on sale of building	(25,121)	0	0
(Gain) loss on currency exchanges	41	126	(72)
Amortization of intangibles	0	305	306
Retirement expenses	72	64	155
Miscellaneous (income) expense	667	1,010	(118)
Other operating (income) expense, net	$ (23,988)	$ 458	$ 441