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Derivative Instruments (Narrative) (Details) - Scenario, Forecast [Member] $ in Thousands	1 Months Ended
	Jun. 30, 2019 USD ($) $ / $	May 31, 2019 USD ($) $ / $	Dec. 31, 2018 USD ($) $ / $
Derivative [Line Items]
Purchase of derivative instruments	$ 16,500	$ 30,000	$ 20,000
Foreign exchange rate	3.96	3.88	630.75

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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

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- Definition

Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521

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- Definition

The cash outflow for derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments.

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