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Acquisitions and Dispositions - Schedule of Unaudited Pro Forma Financial Information (Detail) - Electro Scientific Industries Inc [Member] - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Acquisition Date [Line Items] |  |
Total net revenues | $ 478,069 | $ 660,513
Net income | $ 49,135 | $ 101,633
Net income per share: |  |
Basic | $ 0.91 | $ 1.87
Diluted | $ 0.90 | $ 1.84

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