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Segment Information and Enterprise Reporting - Analysis of Product Revenues Based upon Geographic Area Shipped (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Revenue, Major Customer [Line Items]
Product revenue	$ 269,625	$ 230,548
Concentration Risk, Percentage	100.00%	100.00%
United States (U.S.) | Reportable Geographical Components
Revenue, Major Customer [Line Items]
Product revenue	$ 189,519	$ 156,668
Concentration Risk, Percentage	70.30%	68.00%
Europe, Middle East and Africa | Reportable Geographical Components
Revenue, Major Customer [Line Items]
Product revenue	$ 54,357	$ 48,472
Concentration Risk, Percentage	20.20%	21.00%
Asia and Australia | Reportable Geographical Components
Revenue, Major Customer [Line Items]
Product revenue	$ 19,312	$ 18,118
Concentration Risk, Percentage	7.20%	7.90%
North and South America (excluding the U.S.) | Reportable Geographical Components
Revenue, Major Customer [Line Items]
Product revenue	$ 6,437	$ 7,290
Concentration Risk, Percentage	2.30%	3.10%

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