Fair Value Measurement - Significant Change In Fair Value Measurement Of Assets And Liabilities (Details) € in Thousands  | 
12 Months Ended | 
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 Dec. 31, 2023  
EUR (€) 
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| Disclosure of fair value measurement of assets [line items] | |
| Assets at beginning of period | € 1,659,698 | 
| Assets at end of period | 2,071,577 | 
| Level 3 | |
| Disclosure of fair value measurement of assets [line items] | |
| Assets at beginning of period | 339 | 
| Additions | 3,279 | 
| Assets at end of period | 3,618 | 
| Financial Assets - Investments FVTPL | Level 3 | |
| Disclosure of fair value measurement of assets [line items] | |
| Assets at beginning of period | 339 | 
| Additions | 97 | 
| Assets at end of period | 436 | 
| Non-current secured notes at FVTPL | Level 3 | |
| Disclosure of fair value measurement of assets [line items] | |
| Additions | 3,182 | 
| Assets at end of period | € 3,182 | 
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- Definition The amount of a present economic resource controlled by the entity as a result of past events. Economic resource is a right that has the potential to produce economic benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. No definition available. 
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- Definition The increase (decrease) in the fair value measurement of assets. [Refer: At fair value [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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