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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
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Jul. 01, 2017 | Jul. 02, 2016 | Jul. 01, 2017 | Jul. 02, 2016
Analysis of Product Revenues Based upon the Geographic Area Shipped |  |  |  |
Total product revenue | $ 182,802 | $ 164,607 | $ 360,899 | $ 327,897
Total product revenue, in percentage | 100.00% | 100.00% | 100.00% | 100.00%
North and South America | Reportable Geographical Components |  |  |  |
Analysis of Product Revenues Based upon the Geographic Area Shipped |  |  |  |
Total product revenue | $ 5,666 | $ 4,972 | $ 11,843 | $ 9,206
Total product revenue, in percentage | 3.10% | 3.00% | 3.30% | 2.80%
Europe, Middle East and Africa | Reportable Geographical Components |  |  |  |
Analysis of Product Revenues Based upon the Geographic Area Shipped |  |  |  |
Total product revenue | $ 33,693 | $ 25,988 | $ 64,195 | $ 57,958
Total product revenue, in percentage | 18.40% | 15.80% | 17.80% | 17.70%
Asia and Australia | Reportable Geographical Components |  |  |  |
Analysis of Product Revenues Based upon the Geographic Area Shipped |  |  |  |
Total product revenue | $ 16,988 | $ 16,602 | $ 33,724 | $ 30,184
Total product revenue, in percentage | 9.30% | 10.10% | 9.30% | 9.20%
United States | Reportable Geographical Components |  |  |  |
Analysis of Product Revenues Based upon the Geographic Area Shipped |  |  |  |
Total product revenue | $ 126,455 | $ 117,045 | $ 251,137 | $ 230,549
Total product revenue, in percentage | 69.20% | 71.10% | 69.60% | 70.30%

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