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Investee Companies and other investments (Schedule of Identifiable Assets Acquired and Liabilities Assumed) (Details) - EUR (€) € in Thousands | Dec. 31, 2017 | Oct. 18, 2017 | Dec. 31, 2016 | [1] | Dec. 31, 2015 | [1]
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Disclosure of associates [abstract] |  |  |  |
Receivable from concessions project |  | € 28,927 |  |
Intangible asset |  | 5,505 |  |
Restricted cash |  | 1,795 |  |
Long-term loan | € (42,091) | (21,370) | € (16,961) | € (11,984)
Working Capital, net (excluding cash and cash equivalents) |  | (119) |  |
Deferred tax |  | (4,887) |  |
Total net identifiable assets |  | € 9,851 |  |
[1] | Please refer to note 2C for functional and presentation currency.

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