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Restricted Cash, Deposits and Marketable Securities (Schedule of Restricted Cash) (Details) - EUR (€) € in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | [2]
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Disclosure of Restricted cash deposits and marketable securities [Abstract] |  |  |  |  |  |
Marketable securities |  | € 2,162 | [1] | € 972 | [1],[2] | € 5,971
Short-term restricted cash |  | 3,265 | [3] | 15 | [2],[3] | 73
Restricted marketable securities | [4] | 3,250 |  |  |  |
Long-term restricted non-interest bearing bank deposits | [5] | 1,458 |  | 1,089 |  |
Restricted cash and long-term bank deposits | [6] | 2,202 |  | 4,045 |  |
Long-term restricted cash and deposits |  | € 3,660 |  | € 5,134 | [2] | € 4,886
[1] | During 2016 and 2017, the Company invested in a traded Corporate Bond (rated Baa3 by Moody's) with a coupon rate of 3.389% and a maturity date of December 30, 2018. During 2017, the Company invested in a traded Corporate Bond (rated Baa3 by Moody's) with a coupon rate of 4.435% and a maturity date of December 30, 2020 and in 5.8% WACHOVIA Fixed Interest Float.
[2] | Please refer to note 2C for functional and presentation currency.
[3] | Current accounts and bank deposits securing short term obligations.
[4] | Marketable securities securing the Company's Forward contracts.
[5] | Deposits used to secure obligations towards the land owners and to secure obligations under financial leasing agreements and loan agreements (see Notes 10 and 11).
[6] | Bank deposits securing the Company's swap and Forward contracts. The annual interest rate as of December 31, 2016 was 0.35% - 0.4%. During 2017 the deposits were released due to the closing of the said swap and Forward contracts.

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