Nature of Operations and Summary of Significant Accounting Policies - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	$ 2,698	$ 2,897
Provision charged to expense	103	64
Accounts written off	(26)	(17)
Currency translation	(63)	7
Balance at End of Period	$ 2,712	$ 2,951