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Leases (Narrative) (Details)
€ in Thousands, $ in Thousands
1 Months Ended 6 Months Ended
Apr. 30, 2021
EUR (€)
Jun. 30, 2022
EUR (€)
Jun. 30, 2022
USD ($)
[1]
Dec. 31, 2021
EUR (€)
Disclosure of maturity analysis of operating lease payments [line items]        
Lease Liability   € 16,881    
Right-of-use asset   € 23,360 $ 24,270 € 23,367
Pumped storage [Member]        
Disclosure of maturity analysis of operating lease payments [line items]        
Operating lease agreements (Years)   31 years    
Lease Liability   € 1,335    
Right-of-use asset   € 1,335    
Amount of outstanding € 17      
[1] * Convenience translation into US$ (exchange rate as at June 30, 2022: EUR 1 = US$1.039)