Fair Value Measurements and Financial Instruments - Additional Information (Detail) - Foreign Exchange Contract [Member] - Cash Flow Hedging [Member] - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative, Notional Amount	$ 110,665	$ 154,237
Derivative, Maturity Date	Dec. 31, 2019

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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