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Financial Instruments (Schedule of Change in Interest Rate Profit (Loss)) (Details) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Increase of 1% [Member]    
Disclosure of detailed information about financial instruments [line items]    
Gain (loss) from increase decrease in interest rate € 580 € 1,012
Increase of 3% [Member]    
Disclosure of detailed information about financial instruments [line items]    
Gain (loss) from increase decrease in interest rate 1,701 2,604
Decrease of 1% [Member]    
Disclosure of detailed information about financial instruments [line items]    
Gain (loss) from increase decrease in interest rate (542) (581)
Decrease of 3% [Member]    
Disclosure of detailed information about financial instruments [line items]    
Gain (loss) from increase decrease in interest rate € (1,663) € (2,172)