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Business Segment, Geographic Area, Product and Significant Customer Information - Schedule of Net Revenues and Long-Lived Assets by Geographic Regions (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | $ 573,140 | $ 480,757 | $ 1,127,415 | $ 917,910 |
Long-lived assets | 207,797 |  | 207,797 |  | $ 203,154
United States [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 281,818 | 244,649 | 558,538 | 462,699 |
Long-lived assets | 132,097 |  | 132,097 |  | 124,689
Korea [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 66,983 | 59,827 | 120,994 | 104,705 |
Japan [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 54,087 | 36,865 | 112,361 | 74,657 |
Europe [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 107,193 | 91,630 | 208,577 | 179,873 |
Long-lived assets | 26,622 |  | 26,622 |  | 28,820
Asia (Excluding Korea and Japan) [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 63,059 | $ 47,786 | 126,945 | $ 95,976 |
Long-lived assets | $ 49,078 |  | $ 49,078 |  | $ 49,645

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