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Acquisitions - Schedule of Unaudited Pro Forma Financial Information (Detail) - Electro Scientific Industries Inc [Member] - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Acquisition Date [Line Items] |  |  |  |
Total net revenues | $ 462,451 | $ 573,070 | $ 1,414,660 | $ 1,917,348
Net income | $ 47,669 | $ 91,111 | $ 127,676 | $ 357,333
Net income per share: |  |  |  |
Basic | $ 0.87 | $ 1.67 | $ 2.34 | $ 6.55
Diluted | $ 0.86 | $ 1.65 | $ 2.32 | $ 6.48

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