Fair Value of Derivative Instruments and Location in the Balance Sheets (Detail) - Foreign Exchange Forward And Option Contracts [Member] - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Derivative instruments, assets derivatives	$ 45	$ 1,320
Derivative instruments, liabilities derivatives	294	14
Derivatives Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Derivative instruments, assets derivatives	45	1,262
Derivative instruments, liabilities derivatives	250	3
Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivatives, Fair Value [Line Items]
Derivative instruments, assets derivatives		58
Derivative instruments, liabilities derivatives	$ 44	$ 11

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

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- Definition

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.

+ References

No definition available.

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