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

Financial Instruments (Schedule of Change in Interest Rate Profit (Loss)) (Details)

v3.8.0.1
Financial Instruments (Schedule of Change in Interest Rate Profit (Loss)) (Details) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Increase of 1% [Member]    
Disclosure of detailed information about financial instruments [line items]    
Gain (loss) from increase decrease in interest rate € 804 € 864
Increase of 3% [Member]    
Disclosure of detailed information about financial instruments [line items]    
Gain (loss) from increase decrease in interest rate 2,473 2,587
Decrease of 1% [Member]    
Disclosure of detailed information about financial instruments [line items]    
Gain (loss) from increase decrease in interest rate (863) (857)
Decrease of 3% [Member]    
Disclosure of detailed information about financial instruments [line items]    
Gain (loss) from increase decrease in interest rate € (2,532) € (2,581)