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Revenue from Contracts with Customers - Schedule of Deferred Revenue and Customer Advances by Arrangement (Detail) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 USD ($)
Change in Contract with Customer, Liability [Line Items] |
Beginning balance, January 1 | $ 17,474
Additions to deferred revenue and customer advances | 17,219
Amount of deferred revenue and customer advances recognized in income | (13,933)
Ending balance, March 31 | 24,074
Electro Scientific Industries Inc [Member] |
Change in Contract with Customer, Liability [Line Items] |
Deferred revenue and customer advances assumed | $ 3,314

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