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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 9 Months Ended
Sep. 26, 2020
Sep. 28, 2019
Sep. 26, 2020
Sep. 28, 2019
Revenue, Major Customer [Line Items]        
Product revenue $ 278,112 $ 228,916 $ 848,690 $ 688,974
Concentration Risk, Percentage 100.00% 100.00% 100.00% 100.00%
United States (U.S.) | Reportable Geographical Components        
Revenue, Major Customer [Line Items]        
Product revenue $ 186,919 $ 157,646 $ 571,158 $ 469,827
Concentration Risk, Percentage 67.20% 68.90% 67.30% 68.20%
Europe, Middle East and Africa | Reportable Geographical Components        
Revenue, Major Customer [Line Items]        
Product revenue $ 54,257 $ 42,356 $ 176,781 $ 136,234
Concentration Risk, Percentage 19.50% 18.50% 20.80% 19.80%
Asia and Australia | Reportable Geographical Components        
Revenue, Major Customer [Line Items]        
Product revenue $ 27,583 $ 22,721 $ 73,155 $ 62,524
Concentration Risk, Percentage 9.90% 9.90% 8.60% 9.10%
North and South America (excluding the U.S.) | Reportable Geographical Components        
Revenue, Major Customer [Line Items]        
Product revenue $ 9,353 $ 6,193 $ 27,596 $ 20,389
Concentration Risk, Percentage 3.40% 2.70% 3.30% 2.90%