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Fair Value Measurements - Financial Assets and Liabilities Measured on a Recurring Basis at Fair Value (Detail) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Mutual fund assets | $ 26,448 | $ 25,082
Derivative assets: |  |
Foreign currency contracts | 345 | 185
Total assets at fair value | 26,793 | 25,267
Derivative liabilities: |  |
Foreign currency contracts | 29 | 10
Level 1 [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Mutual fund assets | 26,448 | 25,082
Derivative assets: |  |
Total assets at fair value | 26,448 | 25,082
Level 2 [Member] |  |
Derivative assets: |  |
Foreign currency contracts | 345 | 185
Total assets at fair value | 345 | 185
Derivative liabilities: |  |
Foreign currency contracts | $ 29 | $ 10

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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- Definition The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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