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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 | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | $ 487,152 | $ 486,267 | $ 1,614,567 | $ 1,404,177 |
Long-lived assets | 214,538 |  | 214,538 |  | $ 203,154
United States [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 243,273 | 237,592 | 801,811 | 700,291 |
Long-lived assets | 138,549 |  | 138,549 |  | 124,689
Korea [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 43,468 | 60,908 | 164,462 | 165,613 |
Japan [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 38,964 | 38,411 | 151,325 | 113,068 |
Asia (Excluding Korea and Japan) [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 105,336 | 94,084 | 313,913 | 273,957 |
Long-lived assets | 49,801 |  | 49,801 |  | 49,645
Europe [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 56,111 | $ 55,272 | 183,056 | $ 151,248 |
Long-lived assets | $ 26,188 |  | $ 26,188 |  | $ 28,820

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