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Trade and Other Receivables and Assets (Narrative) (Details) € in Thousands, $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended | 11 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jan. 31, 2018 USD ($) | Jan. 31, 2018 EUR (€) | Nov. 30, 2016 USD ($) | Nov. 30, 2016 EUR (€) | Jul. 31, 2018 USD ($) | Jul. 31, 2018 EUR (€) | Jun. 30, 2018 USD ($) | Jun. 30, 2018 EUR (€) | Mar. 31, 2019 USD ($) | Mar. 31, 2019 EUR (€) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 EUR (€)
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Accumulated profit from forward contracts | € |  | € 631 |  | € 4,255 |  |  |  |  |  |  |  | € 497
Proceeds from forward contracts | € |  |  |  |  |  |  |  | € 3,076 |  |  |  | € 3,076
Forward contract [Member] |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from forward contracts | € |  |  |  |  |  | € 710 |  |  |  | € 710 |  |
USD [Member] |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Accumulated profit from forward contracts | $ | $ 735 |  | $ 4,474 |  |  |  |  |  |  |  | $ 597 |
Proceeds from forward contracts | $ |  |  |  |  |  |  | $ 3,646 |  |  |  | $ 3,646 |
USD [Member] | Forward contract [Member] |  |  |  |  |  |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from forward contracts | $ |  |  |  |  | $ 828 |  |  |  | $ 828 |  |  |

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- Definition The amount of accumulated profit from forward contracts. + References No definition available. + Details
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- Definition Proceeds from forward contracts. + References No definition available. + Details
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- Details
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- Details
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