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Derivatives - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Derivative Instruments,Gain (Loss) [Line Items] |  |  |  |
Net gain (loss) on foreign currency exchange contracts | $ (105) | $ 1,865 | $ (376) | $ 534
Not Designated as Hedging Instrument | Foreign Currency Exchange Contracts | Other Income (Expense), Net |  |  |  |
Derivative Instruments,Gain (Loss) [Line Items] |  |  |  |
Net gain (loss) on foreign currency exchange contracts | $ (100) | $ 1,900 | $ (400) | $ 500

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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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