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Revenue from Contracts with Customers - Schedule of Deferred Revenue and Customer Advances by Arrangement (Detail) $ in Thousands | 6 Months Ended
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Jun. 30, 2019 USD ($)
Change in Contract with Customer, Liability [Line Items] |
Beginning balance, January 1 | $ 17,474
Additions to deferred revenue and customer advances | 34,772
Amount of deferred revenue and customer advances recognized in income | (27,407)
Ending balance, June 30 | 29,468
Electro Scientific Industries Inc [Member] |
Change in Contract with Customer, Liability [Line Items] |
Deferred revenue and customer advances assumed | $ 4,629

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