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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 6 Months Ended
Jun. 29, 2019
Jun. 30, 2018
Jun. 29, 2019
Jun. 30, 2018
Revenue, Major Customer [Line Items]        
Concentration Risk, Percentage 100.00% 100.00% 100.00% 100.00%
Product revenue $ 229,510 $ 202,004 $ 460,058 $ 406,393
United States (U.S.) | Reportable Geographical Components        
Revenue, Major Customer [Line Items]        
Concentration Risk, Percentage 67.80% 69.40% 67.90% 69.20%
Product revenue $ 155,513 $ 140,134 $ 312,181 $ 281,175
Europe, Middle East and Africa | Reportable Geographical Components        
Revenue, Major Customer [Line Items]        
Concentration Risk, Percentage 19.80% 17.00% 20.40% 19.30%
Product revenue $ 45,406 $ 34,328 $ 93,878 $ 78,374
Asia and Australia | Reportable Geographical Components        
Revenue, Major Customer [Line Items]        
Concentration Risk, Percentage 9.40% 10.10% 8.70% 8.20%
Product revenue $ 21,685 $ 20,497 $ 39,803 $ 33,403
North and South America (excluding the U.S.) | Reportable Geographical Components        
Revenue, Major Customer [Line Items]        
Concentration Risk, Percentage 3.00% 3.50% 3.00% 3.30%
Product revenue $ 6,906 $ 7,045 $ 14,196 $ 13,441