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

Investments in an Associate - Summary of Investments in Associate (Details)

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Investments in an Associate - Summary of Investments in Associate (Details) - Swissfillon AG - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Significant Investments In Associates [Line Items]      
At January 1 € 2,009 € 1,917  
Proportionate share of net profit for the year 547 92 € (262)
Derecognition of the associate after minority interest sale (2,556) 0  
At December 31 € 0 € 2,009 € 1,917