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Consideration Transferred (Detail) - USD ($) $ in Thousands | Aug. 01, 2017 | Dec. 14, 2016 | Apr. 01, 2016
--- | --- | --- | ---
Spectrum Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Cash consideration | $ 122,932 |  |
Equity consideration | 247,575 |  |
Working capital adjustment | 955 |  |
Total consideration transferred | $ 371,462 |  |
Atoll GmbH |  |  |
Business Acquisition [Line Items] |  |  |
Cash consideration, less $74 of working capital adjustments |  |  | $ 10,176
Equity consideration |  |  | 14,138
Working capital adjustment |  |  | 74
Estimated fair value of contingent consideration |  |  | 952
Total consideration transferred |  |  | $ 25,266
TangenX Technology Corporation |  |  |
Business Acquisition [Line Items] |  |  |
Cash consideration |  | $ 37,532 |
Working capital adjustment |  | (382) |
Total consideration transferred |  | $ 37,150 |

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