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Investee Companies and other investments (Schedule of Changes in Investments) (Details) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Changes In Equity And Loans [Abstract]      
Balance as at January 1 € 32,234 € 33,561  
Long term loans extended 335 181  
Repayment of long term loans (2,259) (2,560)  
Interest and reevaluation in connection with long term loans 799 758  
Deferred Interests 57 56  
Elimination of interest on loan from related party (878) (676)  
Company's share of income of investee 117 1,525 € 3,086
Foreign currency translation adjustments (3,624) 611  
Balance as at December 31 € 34,029 € 32,234 € 33,561