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Summary of Significant Accounting Policies (Basis of Presentation) (Details) $ in Thousands	12 Months Ended
	Dec. 28, 2018 USD ($) customer Segment	Dec. 29, 2017 USD ($)	Dec. 30, 2016 USD ($)
Accounting Policies [Abstract]
Number of Reportable Segments \| Segment	2
Weeks In Reporting Period	Fifty-two	Fifty-two	Fifty-two
Number of Customers \| customer	4
Schedule of Assets Useful Life [Line Items]
Cumulative effect adjustment of the adoption of ASU 2016-09		$ (510)
Net foreign currency transaction gains (losses)	$ (1,600)	(10,900)	$ 4,300
Retained Earnings [Member]
Schedule of Assets Useful Life [Line Items]
Cumulative effect adjustment of the adoption of ASU 2016-09		$ 302
Stock Options [Member]
Schedule of Assets Useful Life [Line Items]
Contractual life	10 years
Award vesting period	3 years
Restricted Stock And Unit Awards [Member] \| Director [Member]
Schedule of Assets Useful Life [Line Items]
Award vesting period	1 year
Minimum [Member] \| Restricted Stock And Unit Awards [Member]
Schedule of Assets Useful Life [Line Items]
Award vesting period	3 years
Minimum [Member] \| Performance Based Restricted Stock And Restricted Stock Units [Member]
Schedule of Assets Useful Life [Line Items]
Award vesting period	2 years
Minimum [Member] \| Patents [Member]
Schedule of Assets Useful Life [Line Items]
Intangible Asset, Useful Life	5 years
Minimum [Member] \| Customer Lists [Member]
Schedule of Assets Useful Life [Line Items]
Intangible Asset, Useful Life	7 years
Minimum [Member] \| Other Intangible Assets [Member]
Schedule of Assets Useful Life [Line Items]
Intangible Asset, Useful Life	1 year
Maximum [Member] \| Restricted Stock And Unit Awards [Member]
Schedule of Assets Useful Life [Line Items]
Award vesting period	4 years
Maximum [Member] \| Performance Based Restricted Stock And Restricted Stock Units [Member]
Schedule of Assets Useful Life [Line Items]
Award vesting period	3 years
Maximum [Member] \| Patents [Member]
Schedule of Assets Useful Life [Line Items]
Intangible Asset, Useful Life	15 years
Maximum [Member] \| Customer Lists [Member]
Schedule of Assets Useful Life [Line Items]
Intangible Asset, Useful Life	20 years
Maximum [Member] \| Other Intangible Assets [Member]
Schedule of Assets Useful Life [Line Items]
Intangible Asset, Useful Life	10 years
Building and Building Improvements [Member] \| Minimum [Member]
Schedule of Assets Useful Life [Line Items]
Property, Plant and Equipment, Useful Life	12 years
Building and Building Improvements [Member] \| Maximum [Member]
Schedule of Assets Useful Life [Line Items]
Property, Plant and Equipment, Useful Life	30 years
Machinery and Equipment [Member] \| Minimum [Member]
Schedule of Assets Useful Life [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Machinery and Equipment [Member] \| Maximum [Member]
Schedule of Assets Useful Life [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Office Equipment [Member] \| Minimum [Member]
Schedule of Assets Useful Life [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Office Equipment [Member] \| Maximum [Member]
Schedule of Assets Useful Life [Line Items]
Property, Plant and Equipment, Useful Life	10 years