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Cash and Cash Equivalents (Details) - EUR (€)
€ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash and Cash Equivalents        
Other cash equivalents € 16,798 € 42,900 € 12,001  
Cash at bank and at hand 69,939 43,653 93,686  
Cash and cash equivalents € 86,736 € 86,553 € 105,687 € 35,840