Income Taxes (Schedule of Unrecognized Tax Benefits Rollforward) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 28, 2019	Dec. 29, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefit - beginning balance	$ 19,125	$ 18,688	$ 15,287
Gross decreases - tax positions in prior periods	(3,964)	(2,383)	0
Gross increases - tax positions in prior periods	312	1,220	1,591
Gross increases - tax positions in current year	6,595	1,607	2,370
Settlements	0	0	(541)
Increase resulting from currency translation	136
Decrease resulting from currency translation		(7)	(19)
Unrecognized tax benefit - ending balance	$ 22,204	$ 19,125	$ 18,688

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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Amount of unrecognized tax benefits.

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