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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 |  |

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