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Derivatives - Additional Disclosures (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Derivative Instruments,Gain (Loss) [Line Items] |  |  |  |  |
Net loss on foreign currency exchange contracts | [1] | $ 1,598 | $ 477 | $ 1,364 | $ 676
Other income (expense), net | Not designated as hedging instrument | Foreign currency exchange contracts |  |  |  |  |
Derivative Instruments,Gain (Loss) [Line Items] |  |  |  |  |
Net loss on foreign currency exchange contracts |  | $ 1,600 | $ 500 | $ 1,400 | $ 700
[1] | This represents the gains (losses) incurred on foreign currency hedging derivatives (see Note 17 for further details).

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5618551-113959 + Details
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