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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

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