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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, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | $ 217,966 | $ 184,697 | $ 431,805 | $ 391,050 |
Long-lived assets | 71,936 |  | 71,936 |  | $ 74,687
United States [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 123,413 | 107,931 | 243,594 | 225,309 |
Long-lived assets | 56,699 |  | 56,699 |  | 57,701
Korea [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 27,349 | 19,536 | 59,421 | 50,266 |
Japan [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 17,046 | 14,416 | 34,302 | 31,343 |
Asia (Excluding Korea and Japan) [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 30,743 | 24,002 | 54,426 | 45,765 |
Long-lived assets | 9,520 |  | 9,520 |  | 10,887
Europe [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 19,415 | $ 18,812 | 40,062 | $ 38,367 |
Long-lived assets | $ 5,717 |  | $ 5,717 |  | $ 6,099

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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