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Acquisition - Schedule of Unaudited Pro Forma Financial Information (Detail) - Electro Scientific Industries Inc [Member] $ / shares in Units, $ in Millions | 12 Months Ended
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Dec. 31, 2019 USD ($) $ / shares
Acquisition Date [Line Items] |
Total net revenues | $ | $ 1,914.6
Net income | $ | $ 171.5
Net income per share: |
Basic | $ / shares | $ 3.14
Diluted | $ / shares | $ 3.11

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