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Segment Information and Enterprise Reporting Segment Information and Enterprise Reporting - (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Product	$ 936,408	$ 829,874	$ 738,242
Percentage Of Product Revenue Based On Geographic Area By Destination	100.00%	100.00%	100.00%
Long-Lived Assets	$ 219,926	$ 274,389	$ 257,357
Concentration Risk, Long-lived Asset Geographic Area, Percentage	100.00%	100.00%	100.00%
United States (U.S.)
Revenues from External Customers and Long-Lived Assets [Line Items]
Product	$ 636,371	$ 566,816	$ 502,983
Percentage Of Product Revenue Based On Geographic Area By Destination	68.00%	68.30%	68.10%
Europe, Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Product	$ 183,363	$ 160,910	$ 138,689
Percentage Of Product Revenue Based On Geographic Area By Destination	19.60%	19.40%	18.80%
Asia and Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
Product	$ 87,961	$ 75,534	$ 72,434
Percentage Of Product Revenue Based On Geographic Area By Destination	9.40%	9.10%	9.80%
North and South America (excluding U.S.)
Revenues from External Customers and Long-Lived Assets [Line Items]
Product	$ 28,713	$ 26,614	$ 24,136
Percentage Of Product Revenue Based On Geographic Area By Destination	3.00%	3.20%	3.30%
Reportable Geographical Components | United States (U.S.)
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 216,650	$ 262,373	$ 247,555
Concentration Risk, Long-lived Asset Geographic Area, Percentage	98.50%	95.60%	96.20%
Reportable Geographical Components | International
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 3,276	$ 12,016	$ 9,802
Concentration Risk, Long-lived Asset Geographic Area, Percentage	1.50%	4.40%	3.80%

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Section 50
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