Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Financial Instruments (Schedule of Fair Values Hierarchy) (Details)

v3.8.0.1
Financial Instruments (Schedule of Fair Values Hierarchy) (Details) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Disclosure of fair value measurement of assets [line items]    
Income receivable in connection with the Erez electricity pumped storage project (see Note 6) € 1,249 € 1,265
Option to require additional shares in investee  
Marketable securities 5,412 972
Forward contracts 29,011  
Forward contracts [1] 2,650 48
Swap contracts 539 € (2,758)
Currency swap € 1,244  
Forward contract [Member]    
Disclosure of fair value measurement of assets [line items]    
Valuation techniques for determining fair value Fair value measured on the basis of discounting the difference between the forward price in the contract and the current forward price for the residual period until redemption using market interest rates appropriate for similar instruments, including the adjustment required for the parties' credit risks. Fair value measured on the basis of discounting the difference between the forward price in the contract and the current forward price for the residual period until redemption using market interest rates appropriate for similar instruments, including the adjustment required for the parties’ credit risks.
Swap contract [Member]    
Disclosure of fair value measurement of assets [line items]    
Valuation techniques for determining fair value Fair value is measured by discounting the future cash flows, over the period of the contract and using market interest rates appropriate for similar instruments, including the adjustment required for the parties' credit risks. Fair value is measured by discounting the future cash flows, over the period of the contract and using market interest rates appropriate for similar instruments, including the adjustment required for the parties’ credit risks.
Currency swap [Member]    
Disclosure of fair value measurement of assets [line items]    
Valuation techniques for determining fair value Fair value is measured by discounting the future cash flows, over the period of the contract and using market interest rates appropriate for similar instruments, including the adjustment required for the parties' credit risks.  
Income receivable in connection with the Erez Electricity PSP [Member]    
Disclosure of fair value measurement of assets [line items]    
Valuation techniques for determining fair value The fair value of the income receivable in connection with the Erez electricity pumped storage project was calculated according to the cash flows expected to be received in 4.5 years following the financial closing of the project, discounted at a weighted interest rate of 2.36% reflecting the credit risk of the debtor. The fair value of the income receivable in connection with the Erez electricity pumped storage project was calculated according to the cash flows expected to be received in 4.5 years following the financial closing of the project, discounted at a weighted interest rate of 2.36% reflecting the credit risk of the debtor.
Marketable securities [Member]    
Disclosure of fair value measurement of assets [line items]    
Valuation techniques for determining fair value Market price Market price
Level 1 [Member]    
Disclosure of fair value measurement of assets [line items]    
Income receivable in connection with the Erez electricity pumped storage project (see Note 6)
Option to require additional shares in investee  
Marketable securities
Forward contracts  
Forward contracts
Swap contracts
Currency swap  
Level 2 [Member]    
Disclosure of fair value measurement of assets [line items]    
Income receivable in connection with the Erez electricity pumped storage project (see Note 6)
Option to require additional shares in investee  
Marketable securities 5,412 972
Forward contracts  
Forward contracts 2,650 48
Swap contracts 539  
Currency swap 1,244  
Level 3 [Member]    
Disclosure of fair value measurement of assets [line items]    
Income receivable in connection with the Erez electricity pumped storage project (see Note 6) 1,249 1,265
Option to require additional shares in investee [1]  
Marketable securities  
Forward contracts 29,011  
Forward contracts
Swap contracts
Currency swap  
[1] Less than 1 thousand