Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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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.

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No definition available.

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- Definition

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4CC
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- Definition

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e689-108580

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Derivative Instruments - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Foreign currency forward exchange contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 1,060,000	$ 992,800	$ 1,060,000	$ 992,800	$ 962,100
Maximum \| Foreign currency forward exchange contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum term for foreign currency forward exchange contracts			18 months
Derivatives not designated as hedging instruments:
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of (loss) gain recognized in the statements of operations	4,366	(31,800)	$ 3,868	(17,112)
Cost of sales \| Derivatives designated as hedging instruments: \| Foreign currency forward exchange contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reclassification adjustment for realized (losses) gains included in net loss	2,492	(4,800)	3,251	(9,200)
Cost of sales \| Derivatives not designated as hedging instruments: \| Foreign currency forward exchange contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of (loss) gain recognized in the statements of operations	$ 0	$ (248)	$ 0	$ (248)