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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 | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | $ 209,332 | $ 186,798 | $ 641,137 | $ 577,848
Operating Segments [Member] | Advanced Manufacturing Capital Equipment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | 174,101 | 146,360 | 532,300 | 458,337
Operating Segments [Member] | Global Service [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | 29,891 | 28,278 | 87,319 | 80,676
Operating Segments [Member] | Asia Region Sales [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | 46,733 | 40,549 | 158,887 | 133,438
Operating Segments [Member] | Other [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | 19,289 | 21,444 | 59,301 | 61,520
Corporate and Eliminations [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net revenues | $ (60,682) | $ (49,833) | $ (196,670) | $ (156,123)

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