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Business Segment, Geographic Area, Product and Significant Customer Information - Net Revenues by Reportable Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | $ 217,966 | $ 184,697 | $ 431,805 | $ 391,050
Operating Segments [Member] | Advanced Manufacturing Capital Equipment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | 178,966 | 146,479 | 358,199 | 311,977
Operating Segments [Member] | Global Service [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | 29,685 | 27,231 | 57,428 | 52,398
Operating Segments [Member] | Asia Region Sales [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | 56,777 | 40,790 | 112,154 | 92,889
Operating Segments [Member] | Other [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | 18,796 | 19,183 | 40,012 | 40,076
Corporate and Eliminations [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | $ (66,258) | $ (48,986) | $ (135,988) | $ (106,290)

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