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Share-Based Compensation - Options Activity (Details) - € / shares
 9 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Number of Shares Underlying Outstanding Options    
Number outstanding, options (in shares) 325,078 372,329
Granted, options (in shares) 0  
Exercised, options (in shares) (41,417)  
Forfeited, options (in shares) (3,973)  
Canceled, options (in shares) 0  
Expired, options (in shares) (1,861)  
Vested and exercisable, options (in shares) 301,611  
Weighted-average exercise price, options (in Euro per share) € 20.88  
Weighted-average remaining contractual term outstanding, options 4 years 4 months 13 days  
Aggregate intrinsic value, options € 11.46